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REVIEW 9TH GRADERS SCEINCE

Total questions: 41

Worksheet time: 23mins

Name
Class
Date
1.
What does reflection mean?
a)
bending light
b)
bouncing light
2.

The light bulb is....

a)

luminous

b)

non-luminous

3.
A basketball is __________.
a)
transparent
b)
translucent
c)
opaque
d)
light source
4.
A piece of glass is __________.
a)
light
b)
transparent
c)
translucent
d)
opaque
5.

_____?______ materials do not allow ANY light waves to pass through.

a)

Opaque

b)

Transparent

c)

Translucent

6.

_____?_____ materials allow SOME light waves to pass through, but not in a straight path.

a)

Opaque

b)

Transparent

c)

Translucent

7.
Your grandma has plants in her kitchen. They need lots of light! What type of windows should she have installed that will be best for her indoor garden?
a)
opaque windows
b)
translucent windows
c)
transparent windows
d)
no windows, just walls
8.
The ray of light that strikes a reflecting surface is called ________.
a)
incident ray
b)
reflected ray
c)
normal ray
d)
none of the above
9.
If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface
a)
45
b)
90
c)
180
d)
none of the above
10.
What is reflection?
a)
Reflection is the bouncing  of light off the surface that it strikes on.
b)
Reflection is the absorbing of light off the surface that it strikes on.
c)
Reflection is the bending of light off the surface that it strikes on.
d)
Reflection is the scattering of light off the surface that it strikes on.
11.
The color you see is the color that is ___.
a)
reflected
b)
absorbed
12.
A leaf is green, what does this tell you about the light that is being absorbed?
a)
no light is being absorbed
b)
green is being refracted and all the colors are being absorbed.
c)
green is being absorbed and all the other colors are reflected
d)
green is being reflected and all the other colors are being absorbed
13.
Why do we see objects as white?
a)
They absorb all light
b)
They reflect all light
c)
They absorb some light and reflect some light
14.

What are the 3 main fossil fuels?

a)

Coal, Oil, and nuclear fuel

b)

Coal, Oil, and Natural Gas

c)

Electricity, Gas, Petroleum

d)

Coal, Oil, Non-renewable Resources

15.
Fossil fuels are classified as nonrenewable because they.......
a)
require expensive equipment
b)
take millions of years to replace
c)
can be found all over 
d)
provide all the energy we use
16.

Which of these is not a fossil fuel?

a)

Coal

b)

Oil

c)

Electricity

d)

Natural Gas

17.

What is coal made of?

a)

decomposed plant remains

b)

decomposed sea creatures

c)

lava

d)

all of the above

18.
What is a problem that is linked to the burning of fossil fuels?
a)
Global Warming
b)
geothermal energy
c)
solar power panels
d)
none of the above
19.
Formed from dead marine organisms
a)
Oil and Natural Gas
b)
Coal
c)
Fossil Fuels
20.
What fossil fuel is in the image?
a)
Natural Gas
b)
Steam
c)
Coal
d)
Petroleum
21.
What fossil fuel is in the image?
a)
Coal
b)
Natural Gas
c)
Petroleum
22.

What conditions are needed to form coal?

a)

Heat and pressure

b)

Heat

c)

Moisture and pressure

d)

Cool and moist

23.
How long does it take for fossil fuels to form?
a)
Millions of years
b)
2 days 
c)
1 day 
d)
5 weeks 
24.
Energy sources that cannot be replaced once they are used up
a)
Renewable Energy Sources
b)
Non Renewable Energy Sources
25.

Why are fossils fuels so widely used?

a)

They are renewable so they won't run out.

b)

They pollution they produce is less compared to renewable energy sources.

c)

They are easy to obtain and process.

d)

They don't disrupt the environment when mined from the earth.

26.

How are fossil fuels formed?

a)

They are made in factories

b)

Dead plants and animals died millions of years ago and were buried under heat and pressure

c)

Dead plants were buried under heat and pressure

d)

Dead animals were buried under heat and pressure

27.

Fossil Fuels also need an anaerobic environment, in order to form. What does that mean

a)

High oxygen

b)

No oxygen

c)

wide open spaces

d)

working out

28.

What runs of fossil fuels?

a)

Cars

b)

Electricity

c)

Outdoor Grills

d)

All of the Above

29.

The thinning of the ozone layer is also known as the

a)

ozone hole

b)

ozone gap

c)

ozone space

d)

ozone void

30.

Ozone is formed in the

a)

troposhere

b)

stratosphere

c)

mesosphere

d)

thermosphere

31.

SUnburn occurs when your skin is exposed to harmful ______ rays

a)

radio

b)

magnetic

c)

ultraviolet

d)

infrared

32.

Which type of radiation is absorbed by the ozone layer?

a)

infrared

b)

gamma

c)

visible light

d)

ultraviolet

33.

Ozone is made of which chemical element?

a)

Carbon

b)

Hydrogen

c)

Oxygen

d)

Nitrogen

34.
The main human activity that releases greenhouse gases is...
a)
using bottled water
b)
burning fossil fuels
c)
texting on cellphones
d)
eating meat
35.

Adding harmful things to the environment is called

a)

Pollution

b)

Waste

c)

Acid rain

d)

Sulfur dioxide

36.

The ozone layer is important because:

a)

It is a turbulence free zone for planes to fly in.

b)

It absorbs harmful rays produced by the sun

c)

It produces most of the oxygen needed for organisms in the troposphere

37.

How many oxygen atoms does a molecule of ozone contain?

a)

1

b)

2

c)

3

d)

4

38.

What is the name of the international agreement committing parties to phasing out ozone depleting substances and phasing out chlorofluorocarbons (CFCs)?

a)

Vienna Protocol

b)

Paris Agreement

c)

Montreal Protocol

d)

Antarctic Convention

39.

Which of the following represents ozone gas molecule:

a)

O6

b)

O4

c)

O9

d)

O3

40.

The Montreal Protocol was passed in

a)

1985

b)

1986

c)

1987

d)

1982

41.

Which of the following is the most common ozone destroying pollutants?

a)

Chloroflurocarbons

b)

particular matter

c)

Nitrogen dioxide

d)

carbon monoxide

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