Science Form 1 Chapter 4 Variety of Resources

7/28/2019 Science Form 1 Chapter 4 Variety of Resources

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Resources

on Earth

Living

things

Non livingthings

4.1 Natural Resources on

Earth



4.2 Understanding Element, Compound and

Mixture

Matter

Element

Metal Nonmetal

Compound Mixture





Element• Element: a substance that consists

___________________________ only.• It is the _________________and _________

___________ by any chemical or physical

method.



Element



Surface

Malleability

Ductility



Surface

• The surface of metals are __________

_____________________ compared to

nonmetals.



Malleability

• Malleability is the __________



Ductility

• Ductility is the _

• Metals that lack ductility __



Heat Conductivity

• The ability to -

• Which material is easier to get hot? Metal or

nonmetal material?



Electric conductivity

• The ability of ______



Melting and boiling point

Density

• Most metals are ____________________therefore it requires _________________ them.

• Since metals are mostly ________, their mass

are _____________, thus their densities are all ____________.



Compound• two or more atoms

_______________together.• __________________________________

• electrolysis or heating.



Mixture

• combination of two or more substances

____________________ example : ________.• Example: _____________________________.



Formation

Formation of

newsubstance

Properties

of components

Compound Mixture





Examples of mixtures



Filtration: toseparate

insoluble solids

Evaporation: toseparate

dissolved solidparticles from its

solvent

Distillation: toseparate a

solvent from aliquid or solid-liquid mixture.



Using magnet: to

separatesubstances whichare attracted to a

magnet fromnonmagneticsubstances.

Sieving: to separate

mixture of solidsubstances withdifferent sizes.

Extraction: to

separate liquidsubstances that donot mix well and

with differentdensities





4.3 Appreciating The Importance Of The Variety Of

Earth’s Resources To Man.

Oxygen

Breathing,cellrespiratin,combustion,burning

Carbon

dioxideTo put outfire, forphotosynthesis

Soil

Habitat formany typesof livingthings



Minerals

Soil containsminerals

and waterwhich isvital forgrowing of plants

Fossil fuels

To provideenergy forhouseholduse, factoriesand powerstations togenerateelectricity.

Water

Regulatesbody

temperature,controls theconcentrationof blood



Living things

As food, medicine, fibre, building materials, and soon.



• Conservation: --

• Preservation:…..





Resources

on Earth

Livingthings

Animals

Plants

Non living

things

Air

Water

Fossil fuels

Natural

Gas

Petroleum

Coal

Soil

4.1 Natural Resources on Earth



4.2 Understanding Element, Compound and

Mixture

Matter

Element

Metal Nonmetal

Compound Mixture

http://www.youtube.com/watch?v=d0zION8xjbM



Video 1: Elements http://www.youtube.com/watch?v=d0zION8xjbM







Element

• one type of atom only.

• simplest matter

Atom Molecule

Element



Element

• Element: a substance that consists one type of atom

only.• It is the simplest matter and cannot be separated by

any chemical or physical method.

•

one type of atom only.• simplest matter

Atom Molecule



Element

Metal- solid form except mercury

(liquid)

-Eg: calcium, copper, gold, lead

Non metal

-all states

(solid, liquid and gas) at roomtemperature.

-Eg: sulphur, carbon, bromine,oxygen



Classification of Element

Element

Metal

- In solid form except formercury (liquid)

-Eg: calcium, copper, gold,lead

Non metal

-Exist in all states (solid,liquid and gas) at room

temperature.

-Eg: sulphur, carbon,bromine, oxygen



Surface

Melting and

boiling point

Electric

Conductivity

Malleability

Ductility

HeatConductivity

Shiny

Malleable

Ductile

Good

Good

High

Dull

Not

malleable

Brittle

Weak

Do not conduct,

except Carbon

Low

DensityHigh Low



Surface

• The surface of metals are usually shiny when

polished compared to nonmetals.



Malleability

• Malleability is the ability of a metal to be

hammered, rolled, or pressed into various

shapes without rupture or fracture.



Malleability



Ductility

• Ductility is the ability of a metal to be bent or

stretched permanently without rupture or

fracture.

• Metals that lack ductility will crack or break

before bending.



Ductility

Nonmetal- silicon Metal- aluminium



Heat Conductivity

• The ability to transfer heat.

• Which material is easier to get hot? Metal or

nonmetal material?

Electric conductivity



Electric conductivity• The ability of transferring electricity.

Type of

material

Light bulb

Wood/ Glass Do not light

Copper Lights up

Metal Lights up



Melting and boiling point

Density

• Most metals are solid (except for mercury),

therefore it requires more heat to melt them.

• Since metals are mostly solids, their mass are

higher, thus their densities are all high.

Video 2: http://www.youtube.com/watch?v=anRdgl4D5KI

http://www.youtube.com/watch?v=anRdgl4D5KI




Properties of metals

p // y / g

C d





Compound• two or more atoms chemically combined

together.• separated through chemical reactions

• electrolysis or heating.

C d



Compound• A compound is a substance that contains two

or more atoms chemically combined together.

• The components in compound can only be

separated through chemical reactions such aselectrolysis or heating.

Mixture



Mixture

• combination of two or more substances mixed

physically; example : stirring.• Example: soil, air, petroleum, blood.

Mixture



Mixture

• A mixture is a combination of two or more

substances that have been mixed physically;for example by stirring.

•A mixture may consists of elements,compounds or both.

Video 3: http://www.youtube.com/watch?v=cL6I1O1YHH0

http://www.youtube.com/watch?v=cL6I1O1YHH0







Formation

Separation

Formation of

new substance

Properties of components

Conversion of

energy

Chemically formed

New substance is

formed

New properties

Heat energy is

released

Can be separated

chemically

Physically mixed

No new substance is

formed

Retain its originalproperties

Heat energy is not

released

Can be separated

physically

Compound Mixture

Identification

of components

Components that make

up compound cannot

be identified

Components of

mixture can be

identified easily

Video 4: http://www.youtube.com/watch?v=Q62UfP-ZADY

http://www.youtube.com/watch?v=Q62UfP-ZADY






Electrolysis of Copper (II) Sulphate: Separating a compound



When sugar isheated, it will be

broken into carbon

and water







Filtration: toseparate

insoluble solids

Evaporation: to

separate

dissolved solid

particles from its

solvent

Distillation: toseparate a

solvent from a

liquid or solid-

liquid mixture.



Using magnet: to

separate

substances which

are attracted to a

magnet from

nonmagnetic

substances.

Sieving: to

separate mixture

of solid substances

with different

sizes.

Extraction: to

separate liquid

substances that do

not mix well and

with different

densities



Chromatography: to separate colouredcomponents in a mixture





Earth’s Resources To Man.

Oxygen

Breathing,cell

respiration,

combustion

, burning

Carbon dioxide

To put out fire,for

photosynthesis

Soil

Habitat formany types

of living

things



Minerals

Soil contains

minerals and

water which

is vital for

growing of

plants

Fossil fuels

To provide

energy for

household

use, factoriesand power

stations to

generate

electricity.

Water

Regulates

body

temperature,controls the

concentration

of blood



Living things

As food, medicine, fibre, building

materials, and so on.



• Conservation: involves the intelligent use and

care of our resources.

• Preservation: the act of keeping the resources

in their original state.

Documents

Science Form 1 Chapter 4 Variety of Resources