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Science revision mixed

Total questions: 45

Worksheet time: 34mins

Name
Class
Date
1.
Fluids can also include__ and__. 
a)
solids and liquids
b)
solids and gases
c)
liquids and gases
d)
liquids
2.
Which of the statements is true?
a)
The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.
b)
The bottom of the shoe exerts more pressure than the boot as a result of an decrease in surface area.
c)
The bottom of the shoe exerts the same pressure as the bottom of the boot.
3.
If the horse reared up on 2 legs what effect would it have on the pressure?
a)
it will exert half the pressure it did before
b)
it will exert the same pressure it did before
c)
it will exert twice the pressure it did before
d)
it will exert four times the pressure it did before
4.
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
5.
Look at the pressure triangle. How do we calculate the area?
a)
f ÷ a
b)
f x p
c)
p x f
d)
f ÷ p
6.

A book is kept on horizontal table. How many forces are acting on it?

a)

0

b)

1

c)

2

d)

3

7.

Identify the agent exerting the force while taking out paste from a toothpaste tube

a)

toothpaste tube

b)

toothpaste filled in the tube

c)

muscles of our fingers

d)

no force required

8.

A rocket has been fired upwards to launch a satellite in its Orbit name the forces acting downwards on the rocket immediately after leaving the launching pad

a)

Propelling force of gases emitted by combustion of fuel

b)

magnetic force of Earth

c)

gravitational force of Earth

d)

no force acting downwards

9.

If we release a magnet held in our hand it falls to the ground the force responsible for this is

a)

magnetic force

b)

Electrostatic force

c)

Muscular force

d)

Gravitational force

10.

Which of the following is not an example of muscular force

a)

A child riding a bicycle

b)

a person drawing water from a well

c)

a Porter carrying a load on a cart

d)

an apple falling from a tree

11.
Calculate the net force of the object.
a)
10N
b)
2N
c)
15N
d)
5N
12.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
13.
Buoyancy is the tendency for objects to float in a fluid. Buoyancy pushes the opposite direction of...
a)
waves push.
b)
magnetic pull.
c)
the wind.
d)
gravity's pull
14.
________is the instrument used to measure air pressure.
a)
barometer
b)
thermometer
c)
mercury
d)
watch
15.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
16.

The amount of friction depends on the weight of the objects

a)

True

b)

False

17.
When most objects with smooth surfaces rub, there is less friction.
a)
True
b)
False
18.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
19.

The diagram represents a person using a spring scale to pull a wooden block up a ramp.The plastic straws were placed under the wooden block to

a)

decrease the mass of the block

b)

decrease the amount of friction

c)

increase the surface area of the ramp

d)

increase the gravitational attraction of the block

20.

Identify the force between the wheels of the cart and the ground surface that opposes forward motion of the cart

a)

Momentum

b)

Friction

c)

Magnetic

d)

Force

21.

Can Friction be an opposing force?

a)

Yes, it slows objects down until they stop

b)

No, it can't stop objects

c)

Sometimes if the object has no mass

22.
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
23.
Which of the following is an example of friction that is harmful?
a)
Pencil marking on paper
b)
Engine parts wearing out
c)
sand placed on ice in the winter
d)
Using an eraser to erase marks
24.
Sally experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
25.
Swimming fish experience-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
26.
What are 2 factors that determine the amount of friction between 2 objects?
a)
Force and roughness between surfaces
b)
hills and valleys and how smooth or rough the surface is
c)
Amount of force and amount of surface the comes in contact
d)
The force and the weight exerted on the surfaces
27.

Walking is an example of which type of friction?

a)

fluid

b)

rolling

c)

static

d)

sliding

28.

________ is a reflected sound.

a)

Vibration

b)

Echo

c)

Pitch

d)

Volume

29.
__________ is the loudness or softness of a sound. 
(Hint: Think about our sound song.)
a)
Echo
b)
Volume
c)
Pitch
d)
Vibration
30.
Sound waves travel the SLOWEST through _____________.
a)
gases
b)
solids
c)
liquids
31.
What is frequency?
a)
the number of vibrations per second
b)
how high or low a sound is
c)
the loudness or softness of a sound
d)
the back and forth movement of matter
32.

Why do we see lightning before we hear the thunder?

a)

Lightning is an illusion.

b)

Light travels faster than sound

c)

Sound travels faster than light.

33.

The volume of a sound is measured in units called ________

a)

decibels

b)

hertz

c)

frequency

d)

amplitude

34.
Two identical strings are the same length. One of the strings is pulled tightly and the other string is more loose.
Identify which string will produce a higher-pitched sound when the strings are plucked
a)
the tight string
b)
the loose string
35.

Which device measures sound waves?

a)

Oscilloscope

b)

Stethoscope

c)

Antenna

d)

Microscope

36.

Area of a longitudinal wave where particles are APART.

a)

Compression

b)

Rarefaction

c)

Refraction

d)

Compassion

37.
Sound does not travel in space because
a)
Space is too far away.
b)
There is no matter in space.
c)
Space is the final frontier
d)
Space has planets.
38.
Sound is caused by....
a)
molecules
b)
vibrations
c)
people
d)
space
39.

A back-and-forth motion causing particles to move close together generates a _________.

a)

rarefaction

b)

surface wave

c)

transverse wave

d)

compression

40.

If there is a loud noise in your house, the sound travels through

a)

the air

b)

the air and the wall

c)

the air, the wall, the floor

d)

the air and most everything in the house

41.

The intensity of a sound wave is equal to the sound power (P) divided by the _______.

a)

Area

b)

Time

c)

Distance

d)

Energy

42.
If distance C on the diagram increased, what would happen to the pitch? 
a)
The pitch would be louder. 
b)
The pitch would be softer. 
c)
The pitch would be higher. 
d)
The pitch would be lower. 
43.

What is this?

a)

Ear Drum

b)

Ear Canal

c)

Nerve

d)

Cochlea

44.

What is ultrasound?

a)

Sound with a frequency higher than 20.000 Hz

b)

Sound with a frequency lower than 20 Hz

c)

Sound with a frequency 20 Hz

d)

sound with a frequency 20.000 Hz

45.

_______ is considered sound.

a)

Cotton

b)

Matter

c)

Music

d)

Food

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