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FINAL ONE !!

Total questions: 70

Worksheet time: 2hrs 34mins

Name
Class
Date
1.
White light is made up of _________________ colors.
a)
10
b)
3
c)
7
d)
70
2.
Light travels at ___________________ km per second.
a)
30
b)
300,000
c)
15
d)
1,000,00
3.
Light is a form of ______________________
a)
energy
b)
inertia
c)
currency
d)
sound
4.
All of the following are sources of light except ______________
a)
the sun
b)
a light bulb
c)
fire
d)
the moon
5.
Light that bounces back has been _______________
a)
transferred
b)
heated up
c)
absorbed
d)
reflected
6.
Which of the following items would most likely reflect light?
a)
tree
b)
mirror
c)
horse
d)
brick wall
7.
Light that bends has been ____________________
a)
teleported
b)
reflected
c)
charged
d)
refracted
8.
Light can travel through empty space.
a)
True
b)
False
9.
Which of these items does NOT refract light?
a)
eyeglasses
b)
camera
c)
cheese
d)
telescope
10.
Light travels in ___________________
a)
waves
b)
sound
c)
packs
d)
thunder
11.
Light is produced when a form of energy is ______________
a)
destroyed
b)
converted into light energy
c)
changed into magnetic energy
d)
changed into nuclear energy
12.
A lens that is thicker in the center and thinner at the edges and bends light inwards is a ____________________
a)
concave lens
b)
convex lens
13.
Al lens that is thinner in the center and thicker at the edges and bends light outward is a _______________________
a)
concave lens
b)
convex lens
14.

A ray of light falling on a mirror is called _______________.

a)

reflected ray

b)

normal ray

c)

emergent ray

d)

incident ray

15.

The image of an object formed by a plane mirror is _________ in nature.

a)

virtual

b)

real

c)

diminished

d)

magnified

16.

The path traced by a ray of light is

a)

always a straight line.

b)

a curved line.

c)

a zig-zag line.

d)

dependent on the medium.

17.

If you are standing 2 m away from a plane mirror, the distance between you and your image is ___.

a)

2 m

b)

4 m

c)

6 m

d)

8 m

18.

Which one shows lateral inversion?

a)

Plane mirror

b)

Concave mirror

c)

Convex mirror

d)

All of these

19.

The angle between the incident ray of light and the ray reflected from a plane mirror is 70°. The angle of incidence will be:

a)

70°

b)

30°

c)

35°

d)

90°

20.

The angle of incidence of light on a plane mirror is 30°.The angle of reflection will be:

a)

30°

b)

60°

c)

15°

d)

0°

21.

The angle of incidence on a plane mirror is 30°. The angle between the incident ray and the reflected ray is

a)

30°

b)

15°

c)

60°

d)

90°

22.

The property due to which a light ray striking a surface is returned back into the same medium is called

a)

refraction

b)

reflex action

c)

reflection

d)

regression

23.

A ray of light falling on a mirror, leaves the surface of the mirror and is then called ________.

a)

reflected ray

b)

normal

c)

incident ray

d)

refracted ray

24.

An image that cannot be captured on a screen is called__________.

a)

real image

b)

inverted image

c)

virtual image

d)

reflected image

25.

A red rose is seen in green light. It will appear __________.

a)

red

b)

blue

c)

yellow

d)

black

26.

The primary colours are

a)

Red, Blue and Yellow

b)

Magenta, Yellow and Cyan

c)

Red, Blue and Cyan

d)

Blue, Green and Red

27.

Rectilinear propagation of light means___

a)

light can bend and curve.

b)

light travels in straight line.

c)

light is bounced back by a medium when it falls on the medium.

d)

light gives us the sensation of vision.

28.

Which type of mirror is used in a periscope?

a)

Convex mirror

b)

Concave mirror

c)

Plane mirror

d)

None of these

29.

Regular reflection takes place on the surface of ________.

a)

wall

b)

still water

c)

stones

d)

trees

30.

A perpendicular drawn on the point of incidence of light on the surface of a mirror is called ________.

a)

incident ray

b)

reflected ray

c)

normal

d)

none of these

31.

When a ray of light strikes a plane mirror along the normal, the angle of incidence is __________.

a)

90°

b)

zero degree

c)

45°

d)

none of these

32.

A medium, which partially allows the light rays to pass through it is called __________.

a)

transparent

b)

translucent

c)

non-luminous

d)

opaque

33.

Which is not a luminous body?

a)

Sun

b)

Star

c)

Planet

d)

Glow worm

34.

Walking on the hot sand on a beach

a)

Conduction

b)

Convection

c)

Radiation

35.

A Ceiling fan forcing the warm air downward.

a)

Conduction

b)

Convection

c)

Radiation

36.

Feeling heat from a campfire

a)

Conduction

b)

Convection

c)

Radiation

37.

Chocolate candy melting in your hand.

a)

Conduction

b)

Convection

c)

Radiation

38.

Air in the atmosphere rising and falling

a)

Conduction

b)

Convection

c)

Radiation

39.

Heat from the sun warming a swimming pool

a)

Conduction

b)

Convection

c)

Radiation

40.

Unscrewing a light bulb while it's still hot

a)

Conduction

b)

Convection

c)

Radiation

41.

Heat from the hood of a car when you touch it

a)

Conduction

b)

Convection

c)

Radiation

42.

Feeling the heat from a stove burner without touching it

a)

Conduction

b)

Convection

c)

Radiation

43.

Boiling water moving in a circular motion

a)

Conduction

b)

Convection

c)

Radiation

44.

Energy that is transferred in waves or particles

a)

Conduction

b)

Convection

c)

Radiation

45.

Energy that is transferred by direct contact

a)

Conduction

b)

Convection

c)

Radiation

46.

Energy that is transferred through a fluid where hot rises and cold sinks

a)

Conduction

b)

Convection

c)

Radiation

47.

What is another name for thermal energy?

a)

thermal equilibrium

b)

heat transfer

c)

heat energy

48.

How does heat move?

a)

from a warmer to a cooler object

b)

from a cooler to a warmer object

c)

toward a hot object

d)

away from a cold object

49.

How is energy from the Sun transferred?

a)

by radiation

b)

by conduction

c)

by convection

d)

by the force of gravity

50.

Heat from which of these causes convection currents inside the Earth?

a)

crust

b)

crust and mantle

c)

crust and core

d)

mantle and core

51.

Which of these combines with changes in a fluid's density and the force of gravity to set convection currents in motion?

a)

evaporation of a fluid

b)

condensation of a fluid

c)

freezing and melting of a solid

d)

heating and cooling of a fluid

52.

__________ is the transfer of heat by the movement of a fluid.

a)

Conduction

b)

Convection

c)

Radiation

53.

When you heat up an object, the particles in the object move _________.

a)

faster

b)

the same speed

c)

slower

54.

Cold water has ______________ density than warm water.

a)

less

b)

more

c)

the same

55.

When you touch hot sand, heat is transferred by _________ to your skin.

a)

conduction

b)

convection

c)

radiation

56.

_____________, convection, and conduction are the three types of heat transfer.

a)

Conveyance

b)

Radiation

c)

Translocation

57.

The amount of mass in a given volume of a substance is know as __________.

a)

density

b)

volume

c)

weight

58.
Like poles of a magnet do what?
a)
repel
b)
attract 
c)
nothing 
59.
What device makes a fan plugged into the wall spin?
a)
generator
b)
battery
c)
electromagnet
d)
electric motor
60.
What is a wire in a circuit wrapped around an iron core called?
a)
electromagnet
b)
generator
c)
electric motor
61.
Unlike poles of a magnet do what?
a)
repel
b)
attract
c)
nothing 
62.
If a light bulb is added to a circuit and it turns on, what can we say about this circuit?
a)
open
b)
incomplete
c)
unbroken 
d)
off
63.
What energy transformation takes place in a battery powered fan that is spinning?
a)
kinetic to chemical to electrical
b)
chemical to kinetic
c)
chemical to electrical to kinetic
d)
electrical to kinetic to chemical
64.
What is a complete path through which electric charges can flow called?
a)
magnetic pole
b)
electric circuit 
c)
electric resistance
d)
magnetic field 
65.
What is the force of attraction or repulsion of magnetic materials?
a)
electricity
b)
magnetism 
c)
energy
d)
electromagnetism 
66.
What are huge wheels that rotate when pushed by water, wind, or steam?
a)
magnet wheels
b)
turbines
c)
batteries
d)
generators 
67.
What device changes electrical energy to mechanical energy?
a)
electromagnet
b)
electric motor
c)
conductor
d)
generator 
68.
What do you make if you wrap a current-carrying wire around an iron bolt?
a)
electromagnet
b)
electric motor
c)
generator
69.
What is the region of force around a magnet known as?
a)
magnetic field
b)
magnetic pole
c)
magnetic domain 
d)
lodestone
70.

What device changes mechanical kinetic energy into electrical energy?

a)

electric motor

b)

insulator

c)

electromagnet

d)

generator

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