sciencescience

By:Nurul Aqilah Binti Mohd RusliBy:Nurul Aqilah Binti Mohd Rusli

Teacher:En Mokhzani b. IbrahimTeacher:En Mokhzani b. Ibrahim

WHAT IS SCIENCEWHAT IS SCIENCE

THE NUTURAL PHENOMENA ARE THE NUTURAL PHENOMENA ARE THINGS THAT HAPPEN IN NATURAL.THINGS THAT HAPPEN IN NATURAL.

BENEFITS OF SCIENCEBENEFITS OF SCIENCE

We can get a lot of We can get a lot of benefitsbenefits when we learn when we learn science.science.

Science help us to understand ourselves Science help us to understand ourselves and things that happen in nature.and things that happen in nature.

Thus, we can use scince to solve problem Thus, we can use scince to solve problem in daily life and make our life morein daily life and make our life more comfortablecomfortable. .

SCIENCE-RELATED SCIENCE-RELATED CAREES CAREES

The main fields of studies in science are The main fields of studies in science are physics, chemistryphysics, chemistry and and biologybiology..

SEFTY RULES AND APPARATUS SEFTY RULES AND APPARATUS IN THE LABORATORYIN THE LABORATORY

A laboratory is a place where we usually A laboratory is a place where we usually do scientific investigations.do scientific investigations.

There are a lot of glass apparatus in There are a lot of glass apparatus in laboratory.laboratory.

There are also a lot of chemicals in There are also a lot of chemicals in laboratorylaboratory

HAZARD WARNING HAZARD WARNING SYMBOLS SYMBOLS

These substance may be These substance may be piosonous,flammble, corrosive, explosive, piosonous,flammble, corrosive, explosive, radioactive or irritant.radioactive or irritant.

EXAMPLE PICTURE OF HARZD EXAMPLE PICTURE OF HARZD WARNING SYMBOLSWARNING SYMBOLS

Poisonous mushroomFlammable

Corrosive

Explosive Radioactive Irritant

APPARATUS LABORATORYAPPARATUS LABORATORY

There are many apparatus in the There are many apparatus in the laboratory. We use these apparatus when laboratory. We use these apparatus when caring out scientific investigation.caring out scientific investigation.

Most of them are made of glass, so we Most of them are made of glass, so we must be careful when using them. must be careful when using them.

APPARATUS LABORATORYAPPARATUS LABORATORY

ROUND- BOTTOMED

FLASK

FILTER FUNNEL

TRIPOD STAND

TRIPOD STAND

CRUCIBLE EVAPORATING DISH

BUNSEN BURNER GAS JAR

STEPS OF SCIENTIFIC STEPS OF SCIENTIFIC INVESTIGATIONINVESTIGATION

1.(identifying the problem)

2.(making hypothesis)

3.(plannig the experiment)

4.Controlling variable

5.Obsered(collecting data)

6.Analysing and Interpreting

data

7.Making a conclusion

8.Reporting

Physical Quantities and Their UnitsPhysical Quantities and Their Units

Are measuring five physical quantities: Are measuring five physical quantities: length,mass,temperature,electric length,mass,temperature,electric current and time.current and time.

These quantities in These quantities in SI SI unitsunits

Standard form and prefixed Standard form and prefixed formform

The distance from the Earth to Sun is 150 000 The distance from the Earth to Sun is 150 000 000 000m000 000m

The mass of a hydrogen atom The mass of a hydrogen atom 0.0000000000000000000000167g0.0000000000000000000000167g

Example:Example: 150000000000m =1.5 x 10150000000000m =1.5 x 101111m m

0.00000000000000000000000167 g= 1.67 x 100.00000000000000000000000167 g= 1.67 x 10 ֿֿ2424

fx 10-15femto

px 10-12Pico

nx 10-9Nano

ux 10-6Micro

mx 10-3milli

cx 10-2centi

dx 10-1Deci

dax 101Deca

hx 102Hecto

kx 103Kilo

Mx 106Mega

Gx 109Giga

T x 1012Tera

WeightWeight MassMass

The weight of an object is the The weight of an object is the pull of the pull of the EarthEarth on the object. on the object.

The pull of the Earth is called The pull of the Earth is called the force ofthe force of gravitygravity..

The The mass mass of an object is the of an object is the quantity of quantity of mattermatter..

The The SISI unit of mass is the unit of mass is the kilogram(kg)kilogram(kg). . Example of object:Example of object:triple-beam balance, triple-beam balance,

lever balance or electronic balancelever balance or electronic balance..

Doing a scientific experiment we have to Doing a scientific experiment we have to measure physical quantities.measure physical quantities.

We need to use We need to use measuring toolsmeasuring tools to helps to helps us measure us measure physical quantities.physical quantities.

Measuring the volume of a substance Measuring the volume of a substance accurately is important.accurately is important.

We use We use measuring cylindermeasuring cylinder, , burettes burettes andand pipettes.pipettes.

The unit of measuring volume is The unit of measuring volume is millilitre millilitre (m(mll ) ) and and centimeter (cmcentimeter (cm33).).

Measuring volumeMeasuring volume

(a)measuring the area of a (a)measuring the area of a regular shapedregular shaped (b)Measuring the area of the area of an (b)Measuring the area of the area of an

irregular shapedirregular shaped

We use measuring cylinser, burettes and We use measuring cylinser, burettes and pipetes to measure volumepipetes to measure volume

We usully measure the volume of liquid in We usully measure the volume of liquid in milliter (mmilliter (mll) and the volume of a solid in ) and the volume of a solid in cubic centimeter (cmcubic centimeter (cm33))

THE IMPORTNCE OF STANDRD THE IMPORTNCE OF STANDRD UNITS IN EVERYDAY LIFEUNITS IN EVERYDAY LIFE

In 13th century, a starndard system of In 13th century, a starndard system of units known as the imperial system was units known as the imperial system was introduced in England.Under this introduced in England.Under this system,system,lengthlength is measure in units is measure in units milemile, , chaichai,,yardyard footfoot and and inchinch

MassMass is measured in the pound and ouncr is measured in the pound and ouncr

TERIMA KASIH