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Science form 1 chapter 7, 8 and 9

Total questions: 40

Worksheet time: 22mins

Name
Class
Date
1.

Which of the following is a characteristic of sedimentary rock ?

a)

Formed from the solidification of magma.

b)

Contains fossils of animals and plants.

c)

Formed from exposure to high pressure and temperature.

d)

Contains many mineral.

2.

One type of fire extinguisher contains gas X. Which of the following are the uses of gas X ? (2 answers)

a)

Fuel for rocket

b)

Absorbed by plants for photosynthesis

c)

Needed for human respiration

d)

Used in the production of bicarbonate drinks

3.

The air is made up of _____% Nitrogen.

a)

87

b)

78

c)

76

4.

How to test the presence of Oxygen?

a)

Use lime water

b)

Use glowing wooden splinter

c)

Use burning wooden splinter

d)

Use litmus paper

5.

How to test the presence of Hydrogen?

a)

Use burning wooden splinter

b)

Use glowing wooden splinter

c)

Use litmus paper

d)

Use limewater

6.

Oxygen helps in __________.

(more than 1 answer)

a)

Photosynthesis

b)

Combustion

c)

Make dry ice

d)

Make carbonated drinks

e)

Respiration

7.

Plants absorb吸收 _________ and

releases释放 _________ during photosynthesis.

a)

Nitrogen , Carbon dioxide

b)

Oxygen, Carbon dioxide

c)

Nitrogen , Oxygen

d)

Carbon dioxide , Oxygen

e)

Carbon dioxide , Nitrogen

8.

Too much carbon dioxide in the atmosphere causes导致 __________.

(more than 1 answer)

a)

Global warming

b)

More rain

c)

Air pollution

d)

Greenhouse effect

9.

What is this process?

a)

combustion

b)

decomposition

c)

respiration

d)

rusting

e)

photosynthesis

10.

_________ causes thinning变薄 of ozone layer大气层.

a)

chloroflorocarbon

b)

clorofluorocarbon

c)

chlorofluorocarbon

d)

cloroflorocabon

e)

cloroflorocarbon

11.
If you had a Yellow light with a Magenta filter, what color light would you have after the filter.
a)
Red
b)
Blue 
c)
Green
d)
Cyan
12.
A red bird appears red because it REFLECTS what color
a)
Magenta
b)
Red
c)
Cyan
d)
Doesn't reflect any light
13.
This is an example of...
a)
Reflection
b)
Refraction
c)
Polarization
d)
Spectrum
14.
A plane mirror produces a/an 
a)
a small, real image
b)
a large, real image
c)
 a small, virtual image
d)
a same sized, virtual image
15.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
16.
What is the difference between reflection and refraction? 
a)
Both involve light bending through a medium
b)
Reflection is light bouncing off a medium's surface and refraction is light bending through a medium
c)
Reflection is light bending through a medium's surface and refraction is light bouncing off a medium
d)
Refraction is light being absorbed in a medium and reflection is light being bent through a different medium
17.

When light passes from one medium to a denser medium _________.

a)

it is bent towards the normal.

b)

it always lies along the normal.

c)

it is unaffected.

d)

it is bent away from the normal.

18.
According to the Law of reflection, a light ray striking a mirrow
a)
continues moving through the mirror in the same direction
b)
moves into the mirror at a slightly different angle
c)
bounces off the mirror toward the direction it came from
d)
bounces off the mirror a the same angle it hits.
19.

Which of the component have 21% in the air?

a)

Oxygen

b)

Nitrogen

c)

Carbon dioxide

d)

Inert gas and others

20.

Which of the following statement is TRUE

a)

Air is an element

b)

Argon, neon,helium,krypton andxenon are examples of inert gases

c)

The air does not consist dusts and microorganisms

21.

The gas is used to fill hot air balloons and weather balloons

a)

Argon

b)

Helium

c)

Neon

22.

For welding and cutting metal

a)

Nitrogen

b)

Carbon dioxide

c)

Oxygen

23.
How do plants help slow soil erosion and prevent landslides?
a)
Plants absorb water from the wet soil.
b)
Plant roots hold soil particles together.
c)
Plant leaves release water from the soil into the air.
24.
How does weathering help form a sandy beach by the ocean?
a)
Melting glaciers deposit grains of sand.
b)
Sandstorms deposit sand from nearby deserts.
c)
Waves break rocks into pieces, making grains of sand.
d)
Chemicals in the waves dissolve large rocks into sand.
25.

Supplies food sources such as fish, squids and shrimps

a)

Geosphere

b)

Hydrosphere

c)

Atmosphere

d)

Biosphere

26.

Contains minerals that are very useful for human life

a)

Geosphere

b)

Hydrosphere

c)

Atmosphere

d)

Biosphere

27.

Contains ozone and absorbs the harmful rays from the sunlight

a)

Geosphere

b)

Hydrosphere

c)

Atmosphere

d)

Biosphere

28.

Formed from cooling and solidification of magma and lava

a)

Igneous rocks

b)

Metamorphic rocks

c)

Sedimentary rocks

29.

Caused by high temperature and pressure

a)

Igneous rocks

b)

Metamorphic rocks

c)

Sedimentary rocks

30.

Process that occurs on Earth's surface

a)

Endogenic

b)

Exogenic

31.
How much oxygen is in the air? (%)
a)
25%
b)
21%
c)
68%
d)
50%
32.

Why air is considered a mixture ?

a)

Each gas has no color, so cannot be differentiate

b)

Each gas still shows its original properties when separated.

33.

What is environmental problem shown?

a)

Covid 19

b)

Haze

c)

Greenhouse effect

34.

Why oxygen level decrease in cave?

a)

decay of organisms ike dead bats in the cave

b)

the space in cave is very small

c)

respiration of bats or other animals inside the cave

35.

What advantage of people use torch instead of torchlight?

a)

It is brighter

b)

To know the presence of oxygen

36.

The angle of reflection is 45 degrees, what is the angle of incidence?

a)

65 degrees

b)

45 degrees

c)

90 degrees

d)

180 degrees

37.

A red filter will transmit which color of the Visible Spectrum?

a)

Blue

b)

Green

c)

Yellow

d)

Red

38.

A red filter will transmit which color of the Visible Spectrum?

a)

Blue

b)

Green

c)

Yellow

d)

Red

39.

What type of lens creates the image seen in the eyeglasses?

a)

convex

b)

concave

c)

reflection

d)

plane

40.

Which optical technology do we use to observe small things?

a)

Telescope

b)

Microscope

c)

Camera

d)

ALL of them

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