chap 1 tues 11 jan

8/7/2019 chap 1 tues 11 jan

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INTRODUCTIONINTRODUCTION


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Chapter 1Chapter 1

Introduction To ScienceIntroduction To Science


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What is Science?What is Science?

1.1. Science is the systematic study of natureScience is the systematic study of natureand its effects on us and theand its effects on us and theenvironment.environment.

2.2. Science helps to explain naturalScience helps to explain naturalphenomena.phenomena.

3.3. Scientific knowledge is always growing.Scientific knowledge is always growing.


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Natural PhenomenaNatural Phenomena

ACTIVITY 1ACTIVITY 1

List down natural phenomena thatList down natural phenomena thatyou can see around youyou can see around you

everyday.everyday.

2 minutes only2 minutes only


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Importance of Science in Everyday LifeImportance of Science in Everyday Life


Think 1 importance of science in everydayThink 1 importance of science in everydaylife about 3 minutes.life about 3 minutes.

Then, I will choose 4 of you to present it inThen, I will choose 4 of you to present it in

front of the class.front of the class.

Start now!!!!!!!!!!!Start now!!!!!!!!!!!


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Careers in ScienceCareers in Science


What is your ambition?What is your ambition?

Is it relate with science?Is it relate with science?


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Study of ScienceStudy of Science AstronomyAstronomy -- the study of planets and stars.the study of planets and stars.

BiologyBiology -- the study of life.the study of life.

PhysicsPhysics -- the study of matter and energy.the study of matter and energy.

GeologyGeology -- the study of rocks and minerals.the study of rocks and minerals.

MeteorologyMeteorology -- the study of weather and climate.the study of weather and climate.

ChemistryChemistry -- the study of the composition andthe study of the composition andchemical properties of substances.chemical properties of substances.


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1.2 A science Laboratory1.2 A science Laboratory

1. Scientists can work anywhere. Most scientists

do their experiments in a laboratory.

2. However, some chemicals are dangerous. We

need to handle these chemicals carefully. We

need to know about safety in the laboratory.


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Safety rules in the science

laboratoryHOMEWORK

List down all safety rules in the sciencelaboratory in your note book.

I want to see this Thursday.

Find out the rules at the laboratory or textbook during free time.


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HazordousHazordous SymbolsSymbols

1. (Mixture of hydrogen and

air, nitrates, sodium,

potassium)

Keep away from fire or

heat sources.

2. (Petrol, kerosene,

ethanol, white

phosphorus, yellow

phosphorus) Keep away from fire or

heat sources.


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1. Mercury, lead, chlorine,

sodium cyanide,hydrogen sulphide.

Keep in a locked

cupboard.

2. Concentrated acids andalkalis, bromine,

hydrogen peroxide.

Be careful not to spill onto

your clothes or yourself. If

accidentally spilt, washquickly with lots of water.


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1. Ammonia, dilute acids,chloroform, alcohol,

bromine

Be careful not to spill onto

your clothes or yourself. If

accidentally spilt, washquickly with lots of water.

2. Uranium, plutonium,

radium, radioactive

carbon Keep in special lead

containers.


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Common Laboratory ApparatusCommon Laboratory Apparatus


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Bunsen BurnerBunsen Burner


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Way to Use Bunsen BurnerWay to Use Bunsen Burner

1.1. Close the air hole completely by turningClose the air hole completely by turning

the collar.the collar.

2.2. Hold a lighted match or wooden splinterHold a lighted match or wooden splinternear the mouth of the barrel.near the mouth of the barrel.

3.3. Turn on the gas slowly.Turn on the gas slowly.

4.4.W

hen the flame is seen, slowly open theW

hen the flame is seen, slowly open theair hole by turning the collar.air hole by turning the collar.


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CLOSURE AND SUMMARYCLOSURE AND SUMMARY

chap 1 tues 11 jan

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Transcript of chap 1 tues 11 jan