# GCSE Physics Assessment

In this assessment, we will review your student's comprehension of a variety of GCSE Physics topics. This is a timed activity and should take approximately 45 minutes to complete.

Key stage:  KS 4

Curriculum topic:  End of Key Stage Assessments

Curriculum subtopic:  Starter Assessment

Difficulty level:

### QUESTION 1 of 10

In this assessment, we will review your understanding of a variety of GCSE Physics topics. This is a timed activity and should take approximately 45 minutes to complete. Don't worry if it takes you longer.

What happens to water pressure as the depth of the sea increases?

increases

decreases

stays the same

What happens to atmospheric pressure at high altitudes?

increases

decreases

stays the same

What is used to represent a magnetic field?

triangles

circles

lines

Tick two reasons why electromagnets are more useful than permanent magnets.

They cannot be switched off.

They can be switched on and off.

They have a fixed shape.

They can be shaped according to the purpose of their use.

Their magnetic field is fixed.

They are expensive.

Why are electromagnets used to lift heavy objects?

The object stays fixed to the magnet.

The objects are heavy and only electromagnets can lift them.

The objects can be dropped to the desired location when the electromagnet is switched off.

What do we call the accumulation of electrons in a material?

Give an example of a circuit used at home where, if one bulb breaks, the others will still work.

toaster

electric cooker

Christmas tree lights

What does Ohm's Law state?

The current flowing through a conductor is directly proportional to the voltage across the conductor squared.

The current flowing through a conductor is inversely proportional to the voltage across the conductor.

The current flowing through a conductor is directly proportional to the voltage across the conductor.

What provides charge in an electric current?

electrons

protons

neutrons

What is the voltage at which electricity is produced in a power station, in kV?

400,000

4,000

400

What voltage is used by houses in the UK?

11 kV

33 kV

240 V

What is the phenomenon that causes hot air to rise?

convention

convection

contraction

How do radiators and coal fires transfer heat?

by convection

by insulation

Is the following statement true or false?

While a substance is changing state the temperature remains constant.

true

false

Tick two uses of ultrasound.

animal study

detecting fish

finding the distance to the sea bed

detecting volcanic eruptions

What technique do bats use to detect objects around them?

What part of the Electromagnetic Spectrum has the smallest wavelength?

infrared

gamma

visible light

Tick the two most penetrating rays that are used to treat internal organs.

X-rays

infrared

gamma

microwaves

How would you define the frequency of a wave?

the number of waves

the number of crests or troughs of a wave that pass through a specific point in one second

the number of crests of a wave

What is the disposal method for high-level radioactive waste?

It is released into the atmosphere.

It is diluted as it goes into the sea.

It is buried deep underground.

What do cancerous cells do?

They are normal.

They divide and then stop.

They divide out of control.

What is nuclear fusion?

splitting of one large atom into two or more smaller ones

fusing of two or more small atoms into a larger one

fusing of two or more bigger atoms into a smaller one

What is nuclear fission?

splitting of a small atom into two or more larger ones

fusing of two or more small atoms into a larger one

splitting of a large atom into two or more smaller ones

What happens eventually to the original core of a medium-sized star?

black dwarf

supergiant

red giant

Apart from nuclear weapons, name another use of nuclear power.

nuclear submarines

nuclear heating

nuclear ultrasound

Describe the theory that exists for the movement of the Universe today.

It is collapsing.

It is stable.

It is expanding.

What are comets made of? Tick two boxes.

a chunk of ice filled with dust and rock

large rocks

a tail of debris

small rocks

What type of force is needed to keep a satellite in orbit?

a strong force

a centrifugal force

a centripetal force

How will the centripetal force be affected if the distance between the two objects triples?

x 9

÷ 3

÷ 9

A 15 kg bicycle is travelling at 10 m/s. What force is needed to bring it to a halt in 3 s?

50 N

100 N

150 N

What happens to the braking distance as the speed of the car increases?

increases

stays the same

decreases

Why does work need to be done when one cycles up a hill?

Without work the bicycle will eventually move downwards.

Work is needed so the bicycle speeds up.

Without work the cyclist will fall off the bicycle.

Calculate the electrical consumption when the power is 30,000 W and the appliance is being used for 5 hours.

15,000 kWh

150,000 kWh

1,500,000 kWh

Calculate the mass of an object if its weight on Earth is 100 N.

1000 kg

100 kg

10 kg

If the current is 3 A and the voltage is 12 V, what is the resistance?

4 Ohm

36 Ohm

0.25 Ohm

Calculate the force if an object has a mass of 70 kg and an acceleration of 10 m/s2.

200 N

70 N

700 N

Mercury has a specific heat capacity of 140 J/kg °C. Calculate the energy transferred in kJ when 50 kg of mercury are heated from 20°C to 25°C (just write the number in the box below).

What is the efficiency (in percentage) of a radiator where, for every 500 J of energy, 100 J are transferred to the room? Use the formula from the introduction to help you (you can look at it again by clicking on the Help button).

2%

10%

20%

## Momentum is a vector and has both size and direction. Conservation of momentum can be used to calculate the speed of a car after its collision.

A car is driving at 5 m/s. Its mass is 1000 kg. A van (mass 1500 kg) driving towards the car collides with it, and the car and van join together. They keep moving at 1 m/s in the original direction of the van.

(a) Give two features of momentum.

(b) Use your ideas of conservation of momentum to calculate the original velocity of the van.

Put the following sentences in the correct order.

## Column B

Momentum is a vector and has both size and directi...
2
Initial momentum of car = mv = 5000 kg m/s.
3
Final combined momentum = 2500 × –1 = –2500 k...
4
By the conservation of momentum:
6
van’s initial momentum = –7500 kg m/s
5
van’s initial velocity = –7500/1500 = –5 m/s
1

## Column B

alpha particles
beta particles
a few millimetres of aluminium
gamma rays
a few centimetres of air or a few millimetres of p...
• Question 1

What happens to water pressure as the depth of the sea increases?

increases
EDDIE SAYS
In liquids pressure increases with depth, so in deeper water the pressure is higher.
• Question 2

What happens to atmospheric pressure at high altitudes?

decreases
EDDIE SAYS
The number of air particles at higher altitudes decreases, so the pressure is lower.
• Question 3

What is used to represent a magnetic field?

lines
EDDIE SAYS
Magnetic fields are represented using lines.
• Question 4

Tick two reasons why electromagnets are more useful than permanent magnets.

They can be switched on and off.
They can be shaped according to the purpose of their use.
EDDIE SAYS
Electromagnets are more useful than permanent magnets, because they can be switched on and off, the strength of the magnetic field can be altered, they can easily be given the desired shape and they are cheaper to make.
• Question 5

Why are electromagnets used to lift heavy objects?

The objects can be dropped to the desired location when the electromagnet is switched off.
EDDIE SAYS
The reason for lifting heavy objects is to move them to a specified place. It would be impossible to do that with a permanent magnet, as the objects would stay firmly attracted to it. With an electromagnet, magnetism can be switched on and off by switching the electric current on and off, respectively.
• Question 6

What do we call the accumulation of electrons in a material?

static electricity
EDDIE SAYS
The accumulation of electrons in a material is called static electricity.
• Question 7

Give an example of a circuit used at home where, if one bulb breaks, the others will still work.

Christmas tree lights
EDDIE SAYS
Christmas tree lights are connected in parallel so that, if one bulb blows, the others will still work.
• Question 8

What does Ohm's Law state?

The current flowing through a conductor is directly proportional to the voltage across the conductor.
EDDIE SAYS
Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage across the conductor.
• Question 9

What provides charge in an electric current?

electrons
EDDIE SAYS
Electric current is carried by negatively charged electrons in atoms of metal.
• Question 10

What is the voltage at which electricity is produced in a power station, in kV?

400
EDDIE SAYS
Electricity is produced in a power station at 400 kV. This is the same as 400,000 V (Volts).
• Question 11

What voltage is used by houses in the UK?

240 V
EDDIE SAYS
Houses in the UK use electricity at 240 V. 'V' for voltage must always be written in capitals.
• Question 12

What is the phenomenon that causes hot air to rise?

convection
EDDIE SAYS
Convection is the collective movement of particles. Hot air rises, as it is less dense, and this is therefore a form of convection.
• Question 13

How do radiators and coal fires transfer heat?

EDDIE SAYS
• Question 14

Is the following statement true or false?

While a substance is changing state the temperature remains constant.

true
EDDIE SAYS
While a substance is changing state the temperature remains constant. This is a true statement.
• Question 15

Tick two uses of ultrasound.

detecting fish
finding the distance to the sea bed
EDDIE SAYS
Ultrasound is used to detect fish, or in submarines and ships to find the sea depth.
• Question 16

What technique do bats use to detect objects around them?

sonar
EDDIE SAYS
Bats use sonar to detect objects around them.
• Question 17

What part of the Electromagnetic Spectrum has the smallest wavelength?

gamma
EDDIE SAYS
The gamma radiation end of the Electromagnetic Spectrum has the smallest wavelength.
• Question 18

Tick the two most penetrating rays that are used to treat internal organs.

X-rays
gamma
EDDIE SAYS
The two most penetrating rays that are used to treat internal organs are gamma radiation and X-rays.
• Question 19

How would you define the frequency of a wave?

the number of crests or troughs of a wave that pass through a specific point in one second
EDDIE SAYS
Do not worry if you did not know the answer to this question; it was meant to make you think scientifically. Wave frequency is the number of crests or troughs of a wave that pass through a specific point in one second.
• Question 20

What is the disposal method for high-level radioactive waste?

It is buried deep underground.
EDDIE SAYS
High-level radioactive waste is buried deep underground - up to 1 kilometre deep.
• Question 21

What do cancerous cells do?

They divide out of control.
EDDIE SAYS
Cancerous cells divide so quickly that it is impossible to control them, causing the cancer to spread very quickly.
• Question 22

What is nuclear fusion?

fusing of two or more small atoms into a larger one
EDDIE SAYS
Nuclear fusion is fusing of two or more small atoms into a larger one.
• Question 23

What is nuclear fission?

splitting of a large atom into two or more smaller ones
EDDIE SAYS
Nuclear fission is the splitting of a large atom into two or more smaller ones.
• Question 24

What happens eventually to the original core of a medium-sized star?

black dwarf
EDDIE SAYS
The core of the original star shrinks to about the size of the Earth; it is very hot and shines brightly as a white dwarf. It does not make any energy, so it cools down and becomes yellow and then red and then forms a black dwarf.
• Question 25

Apart from nuclear weapons, name another use of nuclear power.

nuclear submarines
EDDIE SAYS
Apart from nuclear weapons, another use of nuclear power is nuclear submarines.
• Question 26

Describe the theory that exists for the movement of the Universe today.

It is expanding.
EDDIE SAYS
Scientists today believe that the Universe is expanding.
• Question 27

What are comets made of? Tick two boxes.

a chunk of ice filled with dust and rock
a tail of debris
EDDIE SAYS
Comets are made of a chunk of ice filled with dust and rock and a tail of debris.
• Question 28

What type of force is needed to keep a satellite in orbit?

a centripetal force
EDDIE SAYS
A centripetal force is a force that makes an object follow a curved path, and it is needed to keep a satellite in orbit.
• Question 29

How will the centripetal force be affected if the distance between the two objects triples?

÷ 9
EDDIE SAYS
The centripetal force will become one ninth of what it was, if the distance between the two objects triples.
• Question 30

A 15 kg bicycle is travelling at 10 m/s. What force is needed to bring it to a halt in 3 s?

50 N
EDDIE SAYS
Momentum at start = 15 × 10 = 150 kg m/s
Momentum at end = 15 x 0 = 0 kg m/s
Change in momentum = 150 - 0 = 150 kg m/s

• Question 31

What happens to the braking distance as the speed of the car increases?

increases
EDDIE SAYS
The braking distance increases as the speed of the car increases.
• Question 32

Why does work need to be done when one cycles up a hill?

Without work the bicycle will eventually move downwards.
EDDIE SAYS
When cycling up a hill work needs to be done, so that upward movement continues to reach the top of the hill. Without work the bicycle will eventually move downwards.
• Question 33

Calculate the electrical consumption when the power is 30,000 W and the appliance is being used for 5 hours.

150,000 kWh
EDDIE SAYS
energy used = power x time = 30,000 x 5 = 150,000 kWh
• Question 34

Calculate the mass of an object if its weight on Earth is 100 N.

10 kg
EDDIE SAYS
weight = mass x Earth's gravitational field strength (g)
mass = weight / g = 100 / 10 =10 kg
• Question 35

If the current is 3 A and the voltage is 12 V, what is the resistance?

4 Ohm
EDDIE SAYS
• Question 36

Calculate the force if an object has a mass of 70 kg and an acceleration of 10 m/s2.

700 N
EDDIE SAYS
force = mass x acceleration = 70 x 10 = 700 N
• Question 37

Mercury has a specific heat capacity of 140 J/kg °C. Calculate the energy transferred in kJ when 50 kg of mercury are heated from 20°C to 25°C (just write the number in the box below).

35
EDDIE SAYS
Energy transferred = 50 x 140 x 5 = 35 000 J
1 kJ = 1000 J so 35 000 J = 35 kJ
• Question 38

What is the efficiency (in percentage) of a radiator where, for every 500 J of energy, 100 J are transferred to the room? Use the formula from the introduction to help you (you can look at it again by clicking on the Help button).

20%
EDDIE SAYS

0.2 x 100 = 20% efficiency
• Question 39

## Momentum is a vector and has both size and direction. Conservation of momentum can be used to calculate the speed of a car after its collision.

A car is driving at 5 m/s. Its mass is 1000 kg. A van (mass 1500 kg) driving towards the car collides with it, and the car and van join together. They keep moving at 1 m/s in the original direction of the van.

(a) Give two features of momentum.

(b) Use your ideas of conservation of momentum to calculate the original velocity of the van.

Put the following sentences in the correct order.

## Column B

Momentum is a vector and has both...
1
Initial momentum of car = mv = 50...
2
Final combined momentum = 2500 ×...
3
By the conservation of momentum:
4
van’s initial momentum = –750...
5
van’s initial velocity = –750...
6
EDDIE SAYS
For full marks the answer should include information on:
• Momentum is a vector and has both size and direction.
• Initial momentum of car = mv = 5000 kg m/s.
• Final combined momentum = 2500 × –1 = –2500 kg m/s.
• By the conservation of momentum:
• van’s initial momentum = –7500 kg m/s
• van’s initial velocity = –7500/1500 = –5 m/s
• Question 40

## Column B

alpha particles
a few centimetres of air or a few...
beta particles
a few millimetres of aluminium
gamma rays
EDDIE SAYS
For full marks the answer should include information on:
• The three types of radiation is alpha, beta, gamma (can be in symbol form).
• alpha particles - a few centimetres of air or a few millimetres of paper
• beta particles - a few millimetres of aluminium
• gamma rays - thick block of lead
• ---- OR ----

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