Copy of Year 9 Mid Point Assessment Core Qs Physics only 24_25 - Physics

Question 1

What is the unit of energy?

Answer 1

Joules (J)

Question 2

What form of energy does a moving object have?

Answer 2

Kinetic energy

Question 3

What form of energy is stored in food, fuels and batteries?

Answer 3

Chemical energy

Question 4

What form of energy is carried by moving charges?

Answer 4

Electrical energy

Question 5

What form of energy can we see?

Answer 5

Light energy

Question 6

What form of energy is emitted by vibrating objects?

Answer 6

Sound energy

Question 7

What form of energy is stored in a stretched or compressed object?

Answer 7

Elastic potential energy

Question 8

What form of energy that is stored by an object depends on its temperature?

Answer 8

Thermal energy

Question 9

What form of energy depends on an object’s height above the Earth’s surface?

Answer 9

Gravitational potential energy

Question 10

What form of energy is stored inside atoms?

Answer 10

Nuclear energy

Question 11

What form of energy is stored inside magnets?

Answer 11

Magnetic energy

Question 12

What is the Law of Conservation of Energy?

Answer 12

Energy cannot be created or destroyed, it can only be transferred from one form into another

Question 13

What is the definition of power?

Answer 13

The rate of energy transfer OR the energy transferred each second

Question 14

What is the equation that links power, energy transferred and time?

Answer 14

power = energy transferred / time

Question 15

Which direction does heat flow?

Answer 15

From hotter places to colder places

Question 16

How does heat transfer through a solid?

Answer 16

Conduction

Question 17

How does conduction happen?

Answer 17

Vbrations are passed on to neighbouring particles via collisions

Question 18

What type of material is a good conductor?

Answer 18

A metal

Question 19

What type of material is a poor conductor?

Answer 19

Non metals

Question 20

What do we call a poor conductor of heat?

Answer 20

Insulator

Question 21

What is a fluid?

Answer 21

A substance where the particles are free to move (liquid or a gas)

Question 22

What is density?

Answer 22

Density is a measure of how many particles of a substance are in a given volume.

Question 23

Why do liquids and gases rise when they are heated?

Answer 23

They become less dense

Question 24

What is a vacuum?

Answer 24

An empty space, containing no particles

Question 25

What is it called when waves bounce off a surface?

Answer 25

Reflection

Question 26

What is it called when waves travel into a surface?

Answer 26

Absorption

Question 27

What is it called when waves pass through a material?

Answer 27

Transmission

Question 28

What type of surfaces are good emitters/absorbers of thermal radiation?

Answer 28

Dark, matt surfaces

Question 29

What type of surfaces are good reflectors of thermal radiation?

Answer 29

Light, shiny surfaces

Question 30

What is the unit of charge?

Answer 30

Coulomb (C)

Question 31

What is an electric current?

Answer 31

The rate of flow of charge (The charge flowing per second)

Question 32

What is the unit of electric current?

Answer 32

Amp (A)

Question 33

What instrument is used to measure the size of an electric current?

Answer 33

Ammeter

Question 34

What is the equation that links current, charge and time?

Answer 34

Current = Charge/Time or Charge = Current x Time or Time = Charge/ Current

Question 35

What does the term 'voltage' mean?

Answer 35

The energy transferred per coulomb of charge

Question 36

What is the unit of voltage (potential difference)?

Answer 36

Volt (V)

Question 37

What instrument is used to measure the potential difference (voltage) across a component?

Answer 37

Voltmeter

Question 38

What is the equation that links voltage, charge and energy transferred?

Answer 38

Voltage = Energy transferred/ Charge or Energy transferred = Charge x Voltage

Question 39

What is meant by electrical resistance?

Answer 39

The opposition to the flow of charge or the opposition to the current

Question 40

What is the unit of resistance?

Answer 40

Ohm (Ω)

Question 41

What happens to the current in a circuit when the resistance increases (provided the voltage remains the same)?

Answer 41

The current decreases

Question 42

How are the components connected in a series circuit?

Answer 42

The components are connected end-to-end, one after the other.

Question 43

How are the components connected in a parallel circuit?

Answer 43

The components are connected across each other

Question 44

What is a non-renewable energy resource?

Answer 44

Being used up faster than it is being replaced

Question 45

What is a renewable energy resource?

Answer 45

Being used up as fast as it is being replaced

Question 46

Name three fossil fuels

Answer 46

Coal, oil, natural gas

Question 47

What is the national grid?

Answer 47

A network of transformers and cabling that carries electricity around the country.

Question 48

Why are step-up transformers used as part of the National Grid?

Answer 48

They increase the voltage in the cables to reduce energy lost by heating

Question 49

Why are step-down transformers used as part of the National Grid?

Answer 49

They decrease the voltage in the cables to make it safe to use in our homes

Question 50

A 3 pin plug has 3 wires connected to it. What are the wires called?

Answer 50

Live, neutral and earth wire

Question 51

Why is copper used for the wires in a plug?

Answer 51

Because copper is a good electrical conductor

Question 52

Why is the casing of a plug made from plastic or rubber?

Answer 52

Because plastic /rubber is a good electrical insulator

Question 53

What colour is the insulation on a live wire?

Answer 53

Brown

Question 54

What colour is the insulation on the neutral wire?

Answer 54

Blue

Question 55

What colour is the insulation on the earth wire?

Answer 55

Green and yellow

Question 56

Which wire in a plug prevents an electric shock?

Answer 56

The earth wire

Question 57

What is the mains voltage?

Answer 57

230V