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Review CP 2

Total questions: 35

Worksheet time: 33mins

Name
Class
Date
1.
 What is the unit called that measures force?
a)
weight
b)
meter
c)
Newton
d)
kilogram
2.
The force that acts in the opposite direction of motion when two surfaces come in contact. 
a)
Force
b)
Friction
c)
Static
d)
Kinetic 
3.
What direction does friction act relative to motion?
a)
in the same direction
b)
in the opposite direction 
c)
need more information
d)
depends on the force
4.
How can friction be reduced?
a)
reduce the force acting between the 2 surfaces
b)
reduce the roughness of the 2 surfaces coming in contact
c)
use wax, grease or oil
d)
all of the above are ways of reducing friction
5.
A type of friction that occurs when air pushes against a moving object causing it to decelerate.
a)
surface area
b)
air resistance
c)
velocity
d)
gravity 
6.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
7.
When a sound is louder what measurement gets bigger?
a)
Frequency 
b)
Amplitude 
c)
Wavelength 
d)
Crest
8.

Sound waves travel the fastest through ---

a)

Liquids

b)

Gases

c)

Solids

9.

Sound can travel in medium.

Why sound cant travel in vacuum?

a)

because there is no people there

b)

because no sound source there

c)

because no particle to travel sound

d)

all above them

10.

A sound which has frequency 20-20.000 Hz and audible to humans is called … .

a)

Audiosonic

b)

Infrasonic

c)

Ultrasonic

d)

Videosonic

11.
Army tank tracks are useful for travelling through the mud because..
a)
they decrease the force the vehicle exerts on the ground
b)
they increase the force the vehicle exerts on the ground
c)
they decrease the pressure the vehicle exerts on the ground
d)
they increase the pressure the vehicle exerts on the ground
12.
Which of these animals would probably cause the greatest pressure on the ground?
a)
A fat cow with big feet
b)
A fat cow with small feet
c)
 A calf with big feet
d)
A calf with small feet
13.
What is the equation used to calculate pressure?
a)
pressure= force/mass
b)
pressure =mass/volume
c)
pressure=area/force
d)
pressure=force/area
14.
What is the unit of measurement for pressure?
a)
pascal
b)
grams
c)
milliters
d)
meters
15.
The pressure resulting from a force of 50 N exerted over an area of 5 m2 is
a)
10 N
b)
0.1 N
c)
10 N/m2
d)
0.1 Pa
16.

The pressure resulting from a force of 100 N exerted over an area of 4 m2 is

a)

20 Pa

b)

25 N/m^2

c)

10 N/m2

d)

0.1 Pa

17.

How is much the force if the pressure on object 20 Pa and the area is 2 m^2?

a)

10 N

b)

20 N

c)

40 N

d)

50 N

18.

What are insulators?

a)

materials that let electrical current to flow freely through it

b)

materials that do not let electrical current to flow freely through it

c)

materials that cannot be heated

d)

materials that take shorter time to be heated

19.

What are some examples of insulators?

a)

rubber

b)

wood

c)

iron

d)

plastic

20.

Electricity happens when ... move from one place to another.

a)

battery

b)

light

c)

electrons

d)

electromagnet

21.

Ammeter in the diagram is used to measure

a)

Current

b)

Potential difference

c)

Resistance

d)

Power

22.

Ammeter must placed .. in the circuit

a)

Series

b)

Parallel

23.

Will the light bulbs light up in this image?

a)

Yes, both of them will

b)

Yes, but only the one on the right

c)

No, neither of them will

d)

Yes, but only the one on the left

24.
This is the symbol for a _____?
a)
Lamp
b)
Water wheel
c)
Loudspeaker
d)
Motor
25.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
26.

What kind of circuit is this?

a)

series

b)

parallel

27.

What kind of circuit is this?

a)

series

b)

parallel

28.

Are the currents at A1 and A2 same?

a)

Yes, they are same

b)

No, they are different

29.

This is planet ....

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

30.

The sun is a ....

a)

planet

b)

star

c)

meteor

d)

satellite

31.
Earth and the other planets closest to the Sun are made mostly of _______
a)
gas
b)
metal
c)
water
d)
rock
32.
Which planets have no natural satellites?
a)
Earth & Mars
b)
Jupiter & Saturn
c)
Mercury & Venus
d)
Mercury & Mars
33.

The coldest planet is?

a)

Neptune

b)

Earth

c)

Mercury

d)

Jupiter

34.
How long does it take to the Earth to do the ROTATION MOVEMENT?
a)
365 days
b)
24 hours
c)
24 hours + 6 hours
d)
28 days
35.
What is the difference between the inner planets and the outer planets?
a)
The outer planets are smaller than the inner planets 
b)
The inner planets are smaller than the outer planets
c)
The outer planets have more rocks than the inner planets
d)
the inner planets are heavier than  the outer planets

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