Latest Topic :
Recent Topics

SOURCES AND IMPORTANCE OF HISTORY.


SOURCES AND IMPORTANCE OF HISTORY.
Meaning of History
History is the study of man and his activities in different times

These activities enable man to obtain his needs.

Man’s basic needs are food,cloths and shelter

IMPORTANCE OF STUDYING HISTORY
1. History enables us to understand how man has been working on his environment

2. History helps us to understand the past and the present,that help us to predict the future.

3. It helps us to understand the relationship between people in different periods

4. It helps us to understand technological transformation in human life eg. From stone age to iron age.

5. It helps us to get knowledge on society.

6. It helps us in making investigation on different problems

7. History helps us to understand our origin.

TWO LEVELS OF LOOKING AT STUDYING HISTORY.
1st Level. History explains about man’s struggle to master his environment.

Ie. People irrigating because of drought.

2nd Level :History shows the relationship between man and man’s past.

SOURCES OF HISTORY.
We can obtain historical information through various sources.The main sources are:

· Oral tradition

· Historical sites

· Written records/documents

· Archives

· Museums

· Archeology

· Audio – Visual record ,eg : C assets,Cd’s,TV Programs etc.

· Anthropology

· Linguistic

1. ORAL TRADITIONAL
This involves the passing information by word of mouth through talking and listening.

Oral Traditional pass historical information into two ways.
1. Through culture practices like art,music,religion,riddles,songs,proverbs,superstition,poems and stories.

2. Narration of past events.

FUNCTION OF ORAL TRADITION
1. It preserves historical information of society

2. It collects and pass historical information between generations in the society.

3. It helps researchers in data collection.

ADVANTAGES OF ORAL TRADITION
1. It preserves and reveal historical information which are not recorded.

2. Both illiterate people can obtain historical information

3. Within oral tradition there warnings and teachings.

4. It is the easiest and the cheapest method of obtaining information.

5. It is more live source,since it involves physical interaction.

DISADVANTAGE OF ORAL TRADITION
1. It needs much attention and power of memory.

2. False information can be given by a story – teller.

3. Narration of past events are centered to those people of status i.e kings,Queens,chief.White talking little about common society.

4. There is language problems when narrators use vernacular language.

5. It is difficult to distinguish what is real and what is imaginary information

6. Translation is very difficult because some languages are no longer in existence.

2.HISTORICAL SITES.
Are special places where by the past human remain can be found and shown to the public.
These are places in which the remains of once lived human in the past can be found.
1. They comprise man’s physical development,tools that were made and used from time to time.

2. In these areas we find/see past human product and animal bones.

Example of historical sites include Ismila,Oldivai Gorge,Kondoa Irangi,Bagamoyo,Zanzibar,Kilwa,Mafia,Engaruka,Kagera etc.in Tanzania,Nsongezi,Biggo, Ntubi,Rusinga island,Magosi and Ishago in Uganda.

Lake Rudolf (Turkana), Lake Naivasha,Njoro,Olongesailie,Lake Magadi,Lamu,Mombasa and Mt.Kenya in Kenya.

MAP OF EAST AFRICA SHOWING IMPORTANT HISTORICAL SITES.


FUNCTIONS OF HISTORICAL SITES.
1. Preserve historical information for the coming generations.

2. They are useful sources of information and to reconstruct history.

3. They are the symbols of social culture heritage to the society concern past human tools,rock,paints etc.


ADVANTAGE OF HISTORICAL SITES.
1. They helps for practical historical learning. Eg, through observation of the human tools, rock,paints.

2. Used to reveal past settlement patterns,levels of technology,economic development of political organization reached by the past societies.

3. Act as centers of tourism.

4. They help in transforming theoretical teaching of history to practical historical learning.

5. It acts as the resources centres to researchers.

6. It provides employment opportunities,eg guiders.

3.ARCHAEOLOGY.
Is the scientific study of past human remains.

· This is the study of the material remains of man’s past scientific methods.

· The one specializes in archaeology is called ARCHAEOLOGIST.

· Archaeology involve excavations (digging) of the remains of man’s past historical sites and interpretation.

· The famous archaeologist in East Africa was Dr,Louis Leaky with his wife Mary Lakey.

· Archaeology involves the use of carbon 14 dating to determine plants and animal remains.


FUNCTIONS OF ARCHAEOLOGY.
1. Give important information about man through different stages.

2. It is a useful method of revealing soil covered historical remains.

3. It arouse curiosity of searching past man historical information.

ADVANTAGES OF ARCHAEOLOGY.

1. It helps to know when and how people lived in a certain place.

2. Past object tells us about the life and culture of past.

3. It helps us to know and reveal the technology,pastoral,agricultural and commercial activities of the past man.

4. Through excavation we get knowledge of artifacts eg. Pottery,building etc.

5. It reveal the religious beliefs of the past man.

6. We can compliment another sources of information through archaeology.eg history.

7. We can know the past relationship between different people such as trading activities,migration,marriage,birth,death and political relation.

DISADVANTAGES OF ARCHAEOLOGY.

· It consumes time because of excavation.

· It can not reveal the past people’s language.

· It can not give out reasons for historical events such as wars.

· It needs full experts and advanced technology.

· Poorly interpreted remains can bring false information.

· It can be tell anything about the past social organization.

4. ARCHIEVES.
These are places where collection of private and public documents and old records are preserved .
These documents includes personal letters, Early Travelers and Missionary records,Traders writings,personal and government files,political parties documents etc.


FUNCTION OF ARCHIVES.
a. Archives preserve public and private records that have enduring value to the society.

b. The records in the archives are made available for use by the public.However not all records can be viewed by everyone.

c. Archives collect records of enduring value from various places,Forexample, the nation archives have records from different regions of the country.

d. The archives staff maintains registers of the record in the archives.

e. Archives promote awareness of the availabilities and use of non-current records to the public.

f. Archives have facilities for restoring damaged documents of enduring value

g. The historical information in the archives ensures continuity. Fore example, company policies from previous years can be still guide the employees today.


ADVANTAGES OF ARCHIVES.
1. Easy to identify ideas and literacy level of the past man.

2. It is easy to identify the exact date of the historical event.

3. It used to store historical information.

4. Easy to get historical information from different places and different people.

DISADVANTAGES OF ARCHIVES.
1. It may lead false information, if Author is biased

2. Illiterate people cannot get historical information.

3. It is not get information of the society whose information are not documented.

4. It is difficult to get remote information from archives.

5. It is not renewable once disrupted either by wind other external force.

5.MUSEUMS.
· These are places or buildings where information and objects are preserved.

· It involves all terms which shows culture,political economic and technological development from the past to present.

· Objects can be Eary coins,clothes,minerals cowries,religious and ceremonial symbols.

· Museums can be national ,regional ,district and villages.eg National museums in Dar es salaam,Bagamoyo,Butiama, Kalenga-Iringa.

FUNCTIONS OF MUSEUMS.
1. Preserve historical documents and objects.

2. Shows concrete remains of objects.

3. It is the place for tourist and study tour.

4. It is the center for culture and national identity.

ADVANTAGES OF MUSEUMS.
1. It preserve objects which are used as teaching aids.

2. Museums preserve culture and national identity.

3. It used by researchers(source of information)

4. It acts as tourist center

5. People learn about technological development.

6. Enable learners to arouse creativity.

DISADVANTAGES OF MUSEUMS.
1. It needs knowledgeable people

2. It is possible to distort information through biases by the museum attendant

3. Poor preservation of the past items eg. Coins, pieces of cloth, slaves chain can distort information.

4. It needs extensive care to maintain its beauty or origin.

6.WRITTEN RECORDS.
Are the documents which comprises written historical information.

· These includes books.letters,maps,magazines,journal,newspaper,minutes of meetings and conferences

· Written records can be found in libraries,school,colleges,universities,internet cafes,offices etc.

FUNCTION OF WRITTEN RECORDS.

a. Written records provides pictures of society.

b. These records reflect public opinion, at the time of writing .Forexample ,the letters to the editor in newspaper express the readers feelings on current issue.

c. Written records serve as stores of a large variety of information,including discoveries, government policies, statement ,religious beliefs. fashion,seeches and agreement.

d. In-depth reports of daily events are kepts as written “ecods,Forexample in a diary,newspaper or biography.

ADVANTAGES OF WRITTEN RECORDS.
· It is easy to get information

· Easy to make references.

· It is helpful in doing researches.

· They can be kept for a long time.

DISADVANTAGES OF WRITTEN RECORDS.

1. It can give false information if they are biased by the author.

2. It is difficult to read everything from written records.

3. They are subject to the badly written.

4. Illiterate people can be get information.

7. LINGUISTICS
Is the scientific study and analysis of language.
It includes the study of sound,structure,information and relationship between various language groups.

ADVANTAGES OF LINGUISTICS.
· It helps to get information from various sources.

· Enable to discover links between different people

· It help to determine dates of historical event eg, Aluta Continua “(period of struggle for independence in Mozambique).

LIMITATIONS OF LINGUISTICS.
1. It consume time and finance learning a particular language.

2. Through translation one can commit some important work

3. The present language may be corrupted.

8. ANTHROPOLOGY.
Is the study of the society’s culture system,beliefs,ideas etc.

The study can be give important information about movements,settlements and production activities of the past.

DATING HISTORICAL EVENTS.
Historical usually divide time into several categories ,namely.
Day – is a duration of twenty four hours (24 hrs)


A week is a duration of seven days (7 days).

Month – is a duration of four weeks (4 weeks).

A year – is duration of twelve months (12 months).

A decade – is a duration of ten (10 yrs).

A century – is a duration of one one hundred years (100 yrs).

A millennium – is a duration of thousand years (1000 yrs).

A generation is the average differences on ages between a child and his/her parent.

Age – is a period based on man’s economic activities and the type of tools used eg. Stone age,iron age,industrial age,science and technology age. Ect.

A period – is determined by one continuous event lasting for a number of yers.eg period of slave trade in Eas Africa.

Period of long distance trade.

Period of colonial rule in Africa

Some points have been chosen in order to divide time.

Tears ZERO –present the year when Jesus Chris was born.

It is know as Anno Domino.

(AD) Meaning the year of the lord.

All years before Zero are called (B.C) meaning (Before Christ).

HOW TO DETERMINE DATES.

Dates are instrument in the science of History,this historians divided dates into four ways.
1. Recalling events:-here important events are recalled /remembered eg. Drought ,farming,floods,birth,eruption of diseases etc.

2. By studying language:- some names help people to remember dates of some events,eg word “ Karafuu-started when cloves were introduced in Zanzibar.

3. Carbon 14- is scientific method of determining dates.It used in the finding dates for remains of animals or plants which died beyond 5000 years ago.

· Carbon 14 is a gas found in carbon –dioxide which exist in the atmosphere.

· It obsorbed by plant or other living organisms.When died carbon 14 that has already observed starts to decay at a fixed rate from the time of death.

1. Orders of events ,ways of showing order of events ,periods and ages,among them are:-
· Time graph

· Time chart

· Time line

· Family tree

1. Example of time chart.

2. Example of time graph.

3. Example of time line

4. Family tree

INTRODUCTION TO CHEMISTRY


INTRODUCTION TO CHEMISTRY
What is chemistry?
Chemistry is the branch of science which deals with composition, decomposition and properties of matter.
Or
It is a branch of science which deals with composition, properties and changes of matter.

Note; in chemistry we study how different substances combine with other substances to form new substances.
- People who study chemistry are called chemists.

- Material objects made by application of chemistry, are fertilizers, pesticides, detergents etc.

What is importance of chemistry?

Chemistry is important for our lives and development due to;
1. It helps in manufacturing of medicine to cure sick people.

2. It helps in manufacturing of cooking oil and sugar in the food industry.

3. It helps in manufacturing of detergents like omo, Foma etc for cleaning purposes.

4. It helps in manufacturing of fertilizers for agriculture activity.

5. It helps in manufacturing of chemical substances which kill weeds and pests.

6. It helps in manufacturing of fuel i.e. petrol diesel etc

7. It helps in manufacturing of shoes and clothes.

8. We study chemistry in order to start career. For example to be doctors, pharmacists, physicists etc.

9. We study chemistry in order to answer question about natural things i.e. why does iron rust?

REVIEW EXERCISE
1. Define the following,

i. Chemistry

ii. Laboratory

2. People who study chemistry are known as ……………………………..

3. Mention different material/ objects made by application of chemistry.

i. ………………………………..

ii. ………………………………...

iii. ………………………………..

iv. ………………………………..

v. …………………………………

4. Mention the importance of chemistry in your daily life.

i. ……………………………………

ii. ……………………………………

iii. …………………………………….

iv. ……………………………………

v. …………………………………….

INTRODUCTION TO BIOLOGY


INTRODUCTION TO BIOLOGY

What is biology?
Biology is study of living things or organism.
Living things include bacteria, fungi, animals, pants etc.

Biology is derived/comes from two Greek words;
Bios – means “Life”

Logos – means “study”

The people who study biology are called Biologist. Very small organisms are microorganism. The simplest living things are made up of one cell these are called unicellular organism e.g. bacteria, protozoan and amoeba (also called microscope organism). Large organisms are made up of many cells

These are called multi-cellular organism e.g. fish, trees, man.


WHAT IS LIFE
Life is the state of living thing which plants, animals, and other living organisms have before they die.
The basic unit of life is cell. All living things are made up of cell, cell are so small that they cannot be seen with naked eye.

BRANCHES OF BIOLOGY
There are two main branches of biology
1. Botany – study of plants

2. Zoology – study of animals only

However there are many minor branches of biology. That deal with different aspects of living things

Example;
 
1.Anatomy
Physics structure of organisms

2.Cytology
Deals with cell

3.Ecology
Relation between organisms and their environment

4.Mycology
Deals with fungi

5.Taxonomy
How organisms are named and groups

6.Physiology
How organisms body parts function

7.Parasitology
Deals with parasites

8.Immunology
The body defense against infections and disease

IMPORTANCE OF STUDYING BIOLOGY
1. It helps a man to understand himself/herself better

2. Knowledge of biology enables human being to conserve the environment.

3. It helps man to evaluate environment uses such as pollution, global warming and environment degradation's.

4. Biology help to understand cause, symptoms, method of transmission, prevention, and treatment of diseases this improve the standard of living.

5. It provides answer to fundamental questions.

6. It helps us to enter in careers such as medicine, agriculture, reproductive, health and genetic engineering.

7. Biology helps us appreciate nature.

THE RELATIONSHIP BETWEEN BIOLOGY AND OTHER SUBJECT FIELD
Biology related to many other field of study such as medicine, agriculture, pharmacy such as veterinary, medicine and nutrition.

1. AGRICULTURE
Biology research finding on crops and livestock have led to improve agriculture production.

2. MEDICINE AND PHARMACY
Medicine is the study of prevention and treatment and cure of disease.

3. NUTRITION
Biology is used by dieticians to determine the kind of diets suitable for people with different health problems.

4. FORESTRY
Biologists have developed varieties of trees that grow well in dry areas, also that mature fast so as to prevent desertification.

CHARACTERISTICS OF LIVING THINGS
Living things have characteristics which make them different from non – living thing. These are;

1. NUTRITION/FEEDING
All living things take in food or make their own food. Food enables living things to grow, develop and carry out on life process.

2. RESPIRATION
Respiration is a process by which food substances are broken down to produce useful energy in a cell.

3. EXCRETION
Is the process by which excess waste or harmful material resulting from the chemical reaction occur in body cell are removed out of body.

4. SENSITIVITY/IRRITABILITY
It is the ability of an organism to detect and respond to a change in its environment.

5. GROWTH
Growth is an increase in size and mass of an organism that becomes more complicated and more efficient.

6. MOVEMENT/LOCOMOTION
Is an action of changing posture or position of an organism. Movement which involves the whole body is called locomotion. E.g. Animals but plants just show movement in term of growth of their body parts. E.g. Roots, shoots and leaves.

7. REPRODUCTION
Is the process whereby living things gives rise to new individuals of their own kinds. This ensures that there is continued existence of the species and life forms.

Non – living things are referred to as inanimate.

Living things are referred to as animate.

SCIENTIFIC PROCESS IN BIOLOGY
Biology is a practical science that involves carrying out experiment, observation, measuring and experimentation are skills that we need when studying Biology, and we use our sense organs to make observation.
These organs are;
1. The eyes for seeing

2. The nose for smelling

3. The ears for hearing

4. The tongue for tasting

5. The skin for feeling

Scientific measurements are taken using specific instrument and units.
Some basic biological measures are.......................




In biological investigation like in any other scientific research, methods are listed. The scientific method is a set of steps that scientific used to study things.
Those methods are;
1. Problem identification.

2. Formulation of hypothesis.

3. Experimentation.

4. Observation and data collection.

5. Interpretation of data.

6. Conclusion.

Problem identification
In day to day life one time comes across question which require explanation or problem which needs solution or something to prove e.g. it is observed that buffaloes in Serengeti park are dying at great rate what would be the cause of death or there is poor harvesting or Earth warms are mostly found in the soil wells handed are as why?

Formulation of hypothesis
A hypothesis is a suggestion of the answer to the question asked. It is an intelligent guess that tries to explain as an observation for example Earth worms prefer shaded areas because in the soil shaded there is more moist. A hypothesis can’t be termed as a biological acceptable to explain action. Therefore experiment should be designed, proved or disapproved. If hypothesis is correct we say it is accepted, if disapproved we say rejected.

Experimentation
An experimentation is a test that is carried out under controlled conditions to determine whether a hypothesis is correct or not. In any experiment there is control experiment and experiment test. Example of experiment; Earth worms prefer moist or dry condition.


Observation and data collection
The scientist observes what happens from the time the experiment was set up to the time it ends. It is important to note all the changes made from the beginning to the end of the experiment and recording.

Interpretation of data
At the end of experiment the scientist analysis the observations and data recorded. The scientist may look for pattern or in the data.

Conclusion
A conclusion is a statement that summarizes what a scientist has learnt from an experiment. When scientist read conclusion, they test whether the data or information collected support the hypothesis (accepted) or not support the hypothesis (reject), if so another hypothesis must be formulated and repeat the whole experiment.

BIOLOGY LABORATORY
A laboratory is a special room designed for carrying out scientific experiment. A biology laboratory is a special building designed for carrying out biological experiments. A laboratory should have adequate space for carrying out experiment, proper lighting, good ventilation, source of water, and means of heating and adequate space for storing apparatus, chemicals and specimens.

LABORATORY RULES
In biology laboratory we use hazardous chemical, fragile equipment or dangerous specimens. For this reason, it’s important to follow a certain rules and regulation for our safety and safety for others.

These rules are;
1. No food or drink is allowed in any biology lab. No gum chewing. No putting on of makeup. Lunches, thermoses, and water bottles can be stored inside backpacks or purses. They are not allowed on lab benches, the floor, near computers, or in sinks. Coffee cups are not allowed in the teaching and research labs

2. Be polite- no pushing, shoving, fighting or horseplay.

3. Always wear goggles when you work with chemicals, hot liquids, or other materials that could harm you. Use caution when working with organic solvents if you wear contact lenses (especially soft lenses) – if you’re in doubt about what chemicals you’re working with ask the instructor.

4. Wear gloves while working in the laboratory – gloves are not provided- you must purchase examination gloves yourself. Gloves are available for purchase at the campus bookstore. Please let us know if you have an allergy to latex.

5. If you have allergies or asthma or think you might be pregnant please inform the instructor.

6. Always wear closed toed shoes and long pants or a long skirt during labs to protect your legs and feet from spills.

7. Always alert your teacher to any spills on your skin or clothing.

8. Never taste or smell ANY chemicals unless your teacher tells you it is safe to do so.

9. Tie or pin long hair, scarves and head-wear out of the way to avoid contact with flames or chemicals.

10. Be sure you know how to use equipment before beginning an experiment. If you are unsure - ask!

11. Children are not allowed in the laboratory. There are too many hidden dangers for young people.

12. Mouth pipe ting or drinking of solutions is strictly prohibited.

13. Broken glassware or sharp metal pieces should be placed in “sharps” boxes (also labeled “broken glass”) unless it is contaminated with body fluids or microorganisms. Contaminated sharps should be placed in an appropriate labeled metal or glass container for sterilizing.

14. Organic fluids (e.g., ether, acetone, chloroform) or other volatile liquids should be used inside a fume hood.

15. Chemical wastes should never be placed in a sink drain without permission. Please consult your instructor in all cases.

16. Media with microorganisms (liquid or solid) should be placed in a Biohazard bag or labeled autoclavable beakers for sterilizing and disposal.

17. All glassware should be rinsed after use and test tubes placed upside down in the racks provided. Slides and covers lips should be discarded.

18. Students and instructors should know the locations and operation of all safety equipment. This includes fire extinguishers, eye washes, body showers, first aid kits, and the nearest exit from their room.

Distinguishing the biology laboratory from other facilities
The biology laboratory is different from other school facilities such as classroom, library or physics and chemistry laboratory.

A class room has desk and chairs, students are taught in a class room.

A library has variety of reading materials some libraries have tables and chairs where we can sit and read.

A biology laboratory has models, specimens, cage, aquaria and chart which may not be in physics or chemistry laboratory.

Some of unique things found in biological laboratory are preserved specimens of organisms such as insect, micro organism and plants.

WARNING SIGNS/SAFETY SYMBOLS
These are warning signs that are found on apparatus and chemical containers in the laboratory. Some may be found in or on the boxes used to hold either chemicals or apparatus. These signs must be obeyed in order to ensure safety in the laboratory before one uses a chemical, one should know whether that chemical is Toxic, Corrosive, Flammable, Oxidant, Explosive, Harmful or Irritant.

TOXIC
Toxic substances are dangerous and may cause death immediately or after few days. When handling toxic substances one should be very careful. In case a chemical gets into contact with your skin it should be washed out with a lot of water.


CORROSIVE
Corrosive substances can burn one’s skin. They can cause blindness in case they come into contact with the eyes. Example of corrosive are sulphuric acid, hydrochloric acid, nitric acid, and concentrated alkalis e.g. Sodium hydroxide, potassium hydroxide, ammonium hydroxide.

FLAMMABLE
These are substances which can catch fire easily. The substances should never be brought near open flammable.


OXIDANT
These are chemical that can accelerate burning in the presence of an oxidizing agent; a small fire can be made bigger. Example in the heating of potassium permanganate mixed with saw dust.

EXPLOSIVE
An explosion is a forceful rapid reaction, which involves throwing off of particles at high speed. Chemicals carrying the sign of explosive may cause explosion if not handled carefully and according to the instruction.

HARMFUL/IRRITANT
These are chemicals which can make you sick but it does not kill you, it can cause illness. This substance may not kill immediately, but may have effects after long exposure.

BIOLOGY APPARATUS
Biology apparatus are the tools and equipment's needed in order to study biological experiments effectively.
APPARATUS ............................


THE MICROSCOPE
The microscope is an instrument used to magnify very small specimen so that can be seen clearly.

THERE ARE TWO TYPES OF MICROSCOPE
1. Light microscope

2. Electronic microscope

Light microscope can magnify object up to 2000 times. This is the type of microscope that commonly used in school laboratory.

Electronic microscope can magnify a specimen up to 50000 times.


PARTS OF A LIGHT MICROSCOPE AND THEIR FUNCTION
Eye piece
Has a lens which magnify specimen

Body tube
Support the objective revolving nose piece

Rotating nose piece
Support the objective lens

Objective lens
Magnify specimen under observation. It has three lenses, lower power, medium power and high power

Course adjustment knob
Raises or lower the body tube in order to the image into focus

Arm
Support the body tube, knobs, stage diaphragm and mirror. It’s one of the part which is held when moving the microscope

Fine adjustment
Raises or lowers the body tube in order to bring the image into sharp focus

Ocular tube
The tube allow light to pas straight from the objective lens to the eye piece lens.

THE STRUCTURE OF THE LIGHT MICROSCOPE

How to use light Microscope
1. Place the microscope on the laboratory bench or table makes sure it’s not near the edge.

2. Mount the specimen on a microscope slide, cover it with cover slip.

3. Make sure the low piece objective lens is on line with the eye piece lens.

4. Place the slide with the specimen on the stage.

5. While looking through the eye piece, use your hand to adjust the stage so the light is directed at the specimen on the stage.

6. Adjust the course adjustment knob to bring the specimen focus.

7. Adjust the fine adjustment knob to bring the specimen into sharp focus.

8. Rotate the nose piece to a lighter power objective lens if you want to observe more details on the specimen.

How to care for light Microscope
1. Turn the adjustment knobs slowly, always start with course adjustment knob.

2. Always lift microscope using both hands, one hand holding the arm and other holding the base.

3. When not in use cover the microscope with clean cloth and store it in a dry, dust free space.

4. Clean dirty lenses using lens tissue or soft cloth.

5. Don’t place the microscope at the edge of the table or bench as it could be knocked over.

6. When not in use for a long time remove the lenses and put them in desiccators.

7. Don’t touch the microscope with wet hands.

8. Don’t touch the surface of the mirror of the mirror of the lens with your fingers.

9. Lubricate moving parts regularly.

10. Always use a cover slip in order to protect the lens of the microscope from the substances in the specimen.

11. Remove the slides from the stage immediately after use.

INTRODUCTION TO PHYSICS

INTRODUCTION TO PHYSICS

What is physics?
Physics is the branch of science which deals with matter in relation to energy.
Matter is anything which occupies space and it has weight.
Energy is the capacity or ability to do work.

What is science?
Science is the systematic study of nature.
A person who studies physics is called a physicist.

Branches of physics
Physics is divided into various branches such as;
i. Mechanics – this is the study of motion of bodies in the frame of reference.

ii. Optics – this is the study of physical properties of light.

iii. Atomic physics – this is the study of atoms specifically the electrons and its properties.

iv. Electromagnetism – this is the study of electrical and magnetic fields as two aspects of the same phenomenon.

v. Geophysics – this is the study of physical properties of the earth.

vi. Astronomy – this is the study of celestial bodies such as stars, galaxies, planets, etc

vii. Electronics – this is the study of the flow of electrons in a circuit.

RELATIONSHIP BETWEEN PHYSICS AND OTHER SUBJECTS
1. Chemistry – devices used in studying chemistry such as Bunsen burner and centrifugal device are made from the application of physics. The study atomic physics is also very useful in chemistry.

2. Biology – physics has simplified the study of living things. Those powerful microscopes used in studying biology are made from the application of physics. Different instruments for measuring blood pressure, body temperature, etc are also made by using physics laws.

3. Geography – various devices used in geography to study whether and climate are made from application of physics. Example of these devices are barometers, thermometers wind vane.

4. Mathematics – physics are usually simplified by using mathematics expressions. Thus, Mathematics is the language used by physicist to simplify its information and communication.

5. History – the study radioactivity in physics has enabled the use of Carbon 14 to determine dates in historical excavation.

IMPORTANCE OF STUDYING PHYSICS

1. Knowledge expansion
The study of physics expands our knowledge. We learn about how different machines work and also understand how some natural phenomena such as earthquake, floods and winds occur.

2. Carrier development
People who study physics may further study to be doctors, engineers, computer scientists and many other carriers which require the knowledge of physics.

3. Basic for most modern technology
Studying physics gives a better understand on a modern technology. Devices such as x-ray machines, gas cookers, refrigerators are made from the principles of physics.

APPLICATION OF PHYSICS IN DAILY LIFE
1. Communication – we use radio, television, telephone for communication among us every day.

2. Entertainment – we use music players, Dvd players, computer games, etc. for entertainment.

3. Transportation – we use cars, airplane, and ships for traveling from one place to another place.

4. In medicine – we use various machine in hospitals for diagnosis and treatment e.g. x-ray machine, ultra sound machine, thermometers, etc

5. Agriculture – we use farm equipment's such as tractors, harvester, sprinklers, etc
 
Support : Share Materials | Email; | edutza1@gmail.com
Copyright © 2011. Global Education - All Rights Reserved
Template Created by Clement Charles Published by Global Education
Proudly powered by Blogger