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light and shadow

Total questions: 65

Worksheet time: 58mins

Name
Class
Date
1.

Which is NOT a source of light?

a)

firefly

b)

ball

c)

sun

d)

torch

2.
Which source of light is natural?
a)
firworks
b)
lightbulb
c)
lightning
d)
headlights
3.

An opaque object means that ...

a)

light passes through

b)

no light passes through

c)

some light passes through

d)

you can see through it

4.
What does the moon do?
a)
produces light
b)
reflects the suns light
c)
produces heat
5.
Light travels in..
a)
waves
b)
circles
c)
a straight line
6.

We can see things around us because of light reflecting off the object and into our eyes?

a)

True

b)

False

7.

We are able to see objects because they ____________ light into our eyes.

a)

reflect

b)

refract

c)

shine

d)

defract

8.

Which bottle does not let light through?

a)
b)
9.

What part of our body do we use to detect light?

a)
b)
c)
d)
10.
Which images are opaque?
a)
A & C
b)
A,C,E, & F
c)
D, E, & F
d)
A & E
11.

If light hits something transparent , it will...

a)

make a shadow

b)

pass through

c)

stop

12.

When the sun gets higher in the sky, shadows get ______.

a)

longer

b)

gone

c)

shorter

d)

darker

13.
Which will make the darkest shadow? Light shining on a...
a)
sheet of thin tissue paper
b)
glass window  
c)
wooden chopping board  
d)
none of the above
14.

1. What is the only form of energy we can see?

a)

prism

b)

light

c)

mirror

15.

Which of the following is a man made source of light?

a)

A book

b)

A car

c)

A torch

d)

A poster

16.

Which of the following objects reflect light?

a)
b)
c)
d)
17.

When an opaque object comes in the path of light it forms ___

a)

(a) an image with colours

b)

(b) shadow

c)

(c) black and white image

d)

(d) depends on the colour of the light

18.

Which types of objects do not allow light to pass through them?

a)

(a) Translucent

b)

(b) Opaque

c)

(c) Transparent

d)

(d) Penumbra

19.

Which is an example of a translucent object?

a)

a) A thin sheet of paper

b)

(b) A thin glass slab

c)

(c) A thin iron sheet

d)

(d) All of these

20.

Bouncing back of light from shining surfaces is called____

a)

(a) Reflection

b)

(b) Refraction

c)

(c) Bending

d)

(d) Dispersion

21.

Magma cools down and turns to ________.

a)

igneous rock

b)

sedimentary rock

c)

metamorphic rock

22.

sedimentary rocks turn to __________ when heat and pressure is added.

a)

igneous rocks

b)

sedimentary rocks

c)

metamorphic rocks

23.
Hardness, color, and luster are examples of a mineral's ___________.
a)
price
b)
weight
c)
property
d)
name
24.

Which one of the following mineral is used in manufacturing of Aluminum?

a)

Iron-ore

b)

Copper

c)

Bauxite

d)

Manganese.

25.

Which one of the following mineral is used in manufacturing of Iron?

a)

Magnetite

b)

Copper

c)

Bauxite

d)

Gold

26.
Which of the following is not a type of fossil fuel? 
a)
Coal
b)
Light
c)
Petroleum
d)
Natural Gas
27.
The greenhouse gas having the greatest role in human-caused global warming is
a)
methane
b)
carbon dioxide
c)
CFCs (chlorofluorocarbons)
d)
ozone
28.
The gradual increase in the temperature of the atmosphere is known as ________________.
a)
Greenhouse Effect
b)
Global Warming
c)
Carbon Dioxide Gases
d)
Methane
29.
Why does cutting down trees increase global warming?
a)
trees soak up carbon dioxide
b)
trees provide shade which counteracts global warming
c)
trees absorbs the sun's energy without radiating back into the atmosphere
d)
trees drain greenhouse gases like methane from soil
30.
Burning fossil fuels is one of the main causes for global warming.
a)
True
b)
False
31.
Things you can do to help decrease global warming include:
a)
Eat more ice cream.
b)
Keep your freezer door open.
c)
Keep your air conditioner on high.
d)
Turn off your lights when you’re not using them.
32.

Which of the following could increase the amount of greenhouse gasses in our atmosphere?

a)

Burning fossil fuels

b)

Planting trees

c)

Walking to school and work

d)

Cutting down trees

33.
Which one of the choices below is NOT a  cause for global warming?
a)
Having too many cows
b)
Burning Fossil Fuels
c)
Planting new trees
34.
Burning fossil fuels is one of the main causes for global warming.
a)
True
b)
False
35.

Air is ________ for living things.

a)

essential

b)

tasty

c)

visible

d)

cold

36.

Air is a mixture of ________

a)

liquids

b)

solids

c)

gases

d)

winds

37.

Living things need __________ to live.

a)

oxygen

b)

cars

c)

water vapour

d)

methane

38.

This is water in a gaseous state

a)

water vapour

b)

ice

c)

snow

d)

smoke

39.

Cars and factories produce this gas

a)

Carbon dioxide

b)

Oxygen

c)

Nitrogen

d)

Helium

40.

Air occupies space

a)

True

b)

False

41.

Ais has NO weight

a)

True

b)

False

42.

Cars and factories __________ the atmosphere

a)

pollute

b)

help

c)

clean

d)

increase

43.

Plants produce _____________

a)

smoke

b)

oxygen

c)

steam

d)

Pollution

44.

We can measure the direction of the wind with a....

a)

wind vane

b)

anemometer

c)

thermometer

d)

rain gauge

45.

We can measure air temperature with a...

a)

thermometer

b)

anemometer

c)

rain gauge

d)

wind vane

46.

what is the method used for separating good vegetables from the poor quality ones ?

a)

threshing

b)

handpicking

c)

sieving

d)

winnowing

47.

if we observe a construction site , what method of separation is used to attain very fine particles of soil ?

a)

handpicking

b)

sieving

c)

threshing

d)

winnowing

48.

which method of separation is this ?

a)

decantation

b)

sedimentation

c)

winnowing

d)

sieving

49.

____________is the method of separating heavier and lighter components of a mixture (* hint - solid - solid )

a)

sieving

b)

winnowing

c)

threshing

d)

sedimentation

50.

The type of separation that would be appropriate if you needed to separate solid particles from a liquid is....

a)

Distillation

b)

Filtration

c)

Separation funnel

d)

Crystallization

51.

Separating the mixture using a mesh or a net.

a)

Panning

b)

Filtration

c)

Sieving

52.

Separating solids from liquids.

a)

Panning

b)

Sieving

c)

Filtration

53.

What is the method used in the picture.

a)

Panning

b)

Filtration

c)

Evaporation

54.

What is the method used in the picture.

a)

Sieving

b)

Filtration

c)

Panning

55.

Pure substances are made up of the same kind of atoms.

a)

TRUE

b)

FALSE

56.

Filtration can be used to separate ______

a)

an insoluble solid from a solution

b)

a dissolved solid from a solution

c)

a soluble solid from a solution

57.

How do you separate rocks in water?

a)

Evaporation

b)

Chromatography

c)

Filtration

58.

Which of the following is not a mixture?

a)

Air

b)

Water

c)

Salt water

59.

When the solute dissolves into a solvent and disappears it is called a _____________.

a)

Mixtures

b)

Solution

c)

Solvent

d)

None of the above

60.

In ________ the stalks are beaten to free

the grain seeds.

a)

Winnowing

b)

Threshing

c)

Sieving

d)

Filtration

61.

___________ is used to

separate heavier and lighter components

of a mixture by wind or by blowing air.

a)

Threshing

b)

Winnowing

c)

Sieving

d)

Sedimentation

62.

________ allows the fine flour particles

to pass through the holes of the sieve

while the bigger impurities remain on

the sieve.

a)

Siever

b)

Sieving

c)

Sievester

d)

Decantionion

63.

When the heavier component in a

mixture settles after water is added to

it, the process is called _______________.

a)

Sedimentation

b)

Decantation

c)

Filtration

d)

Winnowing

64.

What separation technique does the picture show?

a)

Sieving

b)

filtering

c)

magnetic separation

d)

Distillation

65.

Sawdust is not soluble in water. If, accidentally some particles of sawdust drop into a glass of water. How would you separate them from water?

a)

Decanting

b)

Filtering

c)

Sieving

d)

Distillation

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