KS3 Physics Transferring Energy,Types of Energy,Releasing Energy,Generating Energy,Renewable Energy

Question 1

What is energy?

Answer 1

Energy is the ability to do work or cause change.

Question 2

What are the two main types of energy?

Answer 2

Kinetic energy and potential energy.

Question 3

True or False: Energy can be created or destroyed.

Answer 3

False: Energy cannot be created or destroyed, only transferred or transformed.

Question 4

Fill in the blank: Kinetic energy is the energy of _____ movement.

Answer 4

motion

Question 5

What is gravitational potential energy?

Answer 5

Gravitational potential energy is stored energy based on an object’s position or condition.

Question 6

What type of energy is associated with the height of an object?

Answer 6

Gravitational potential energy.

Question 7

What is thermal energy?

Answer 7

Thermal energy is the total kinetic energy of particles in an object, related to temperature.

Question 8

What is chemical energy?

Answer 8

Chemical energy is the energy stored in the bonds of chemical compounds.

Question 9

True or False: Renewable energy sources can be replenished naturally.

Answer 9

True.

Question 10

List three examples of renewable energy sources.

Answer 10

Solar energy, wind energy, and hydroelectric energy.

Question 11

What is the primary source of solar energy?

Answer 11

The Sun.

Question 12

Fill in the blank: Wind energy is generated by the movement of _____ air.

Answer 12

air

Question 13

What is biomass?

Answer 13

Biomass is organic material that comes from plants and animals, used as a renewable energy source.

Question 14

What is geothermal energy?

Answer 14

Geothermal energy is heat energy from within the Earth.

Question 15

What does ‘fossil fuel’ refer to?

Answer 15

Fossil fuels are non-renewable energy sources formed from the remains of ancient plants and animals.

Question 16

True or False: Hydroelectric energy is generated using water flow.

Answer 16

True.

Question 17

What is the process of converting sunlight into electricity called?

Answer 17

Photovoltaics.

Question 18

What is energy transfer?

Answer 18

Energy transfer is the movement of energy from one place or object to another.

Question 19

What is an example of energy transformation?

Answer 19

Converting chemical energy in food to kinetic energy when we move.

Question 20

Fill in the blank: Energy efficiency is the ratio of useful energy output to _____ energy input.

Answer 20

total

Question 21

What is the law of conservation of energy?

Answer 21

Energy cannot be created or destroyed, only transformed from one form to another.

Question 22

What type of energy is associated with a compressed spring?

Answer 22

Elastic potential energy.

Question 23

What is sound energy?

Answer 23

Sound energy is the energy produced by vibrating sound waves.

Question 24

What device converts mechanical energy to electrical energy?

Answer 24

Generator.

Question 25

True or False: All energy sources have an environmental impact.

Answer 25

True.

Question 26

What is hydroelectric power?

Answer 26

Hydroelectric power is electricity generated by using water flow to turn turbines.

Question 27

What is a non-renewable energy source?

Answer 27

A source of energy that cannot be replenished in a short time, like coal or oil.

Question 28

Fill in the blank: The process of burning fuel to produce energy is called _____.

Answer 28

combustion

Question 29

What is wave energy?

Answer 29

Wave energy is the energy generated from the movement of surface waves on water.

Question 30

What is the main disadvantage of fossil fuels?

Answer 30

They contribute to greenhouse gas emissions and environmental pollution.

Question 31

What is energy conservation?

Answer 31

Energy conservation is the practice of reducing energy use to save resources.

Question 32

What is the role of a transformer in energy generation?

Answer 32

A transformer increases or decreases the voltage of electrical energy.

Question 33

Fill in the blank: The primary energy source for photosynthesis is _____ energy.

Answer 33

solar

Question 34

What is tidal energy?

Answer 34

Tidal energy is produced by the gravitational pull of the moon and sun on Earth's oceans.

Question 35

What is the primary use of nuclear energy?

Answer 35

To generate electricity through nuclear fission.

Question 36

What is the difference between renewable and non-renewable energy?

Answer 36

Renewable energy can be replenished naturally, while non-renewable energy cannot.

Question 37

True or False: Solar panels convert solar energy directly into thermal energy.

Answer 37

False: They convert solar energy into electrical energy.

Question 38

What is the primary environmental concern with using fossil fuels?

Answer 38

Greenhouse gas emissions leading to climate change.

Question 39

What is energy storage?

Answer 39

Energy storage is capturing energy produced at one time for use at a later time.

Question 40

What is a solar thermal system?

Answer 40

A system that uses sunlight to heat a fluid, which can then be used to produce steam for electricity.

Question 41

Fill in the blank: The ability of a substance to store energy is known as its _____ capacity.

Answer 41

energy

Question 42

What are the benefits of renewable energy?

Answer 42

Reduced carbon emissions, sustainability, and energy security.

Question 43

What is Elastic Potential Energy?

Answer 43

Elastic Potential Energy (EPE) is the energy stored in an object when it's stretched or compressed and has the potential to return to its original shape.

Question 44

What is Magnetic energy?

Answer 44

Magnetic energy in physics refers to the energy associated with a magnetic field, which is created by moving electric charges

Question 45

What is Electrostatic energy?

Answer 45

Electrostatic energy is the potential energy stored in a system of static electric charges.

Question 46

What is the formula for work done?

Answer 46

Work done (W) = Force (F) × Distance (d)

Question 47

True or False: Work is measured in Joules.

Answer 47

True

Question 48

Fill in the blank: Power is the rate of doing _____.

Answer 48

work

Question 49

What is the formula for power?

Answer 49

Power (P) = Work done (W) / Time (t)

Question 50

What unit is power measured in?

Answer 50

Watts (W)

Question 51

If 100 Joules of work is done in 5 seconds, what is the power?

Answer 51

20 Watts

Question 52

What is the efficiency formula?

Answer 52

Efficiency (%) = (Useful output energy / Total input energy) × 100

Question 53

True or False: Efficiency can be greater than 100%.

Answer 53

False

Question 54

What does 1 kilowatt (kW) equal in watts?

Answer 54

1000 Watts

Question 55

What is the formula to calculate electrical power?

Answer 55

Electrical Power (P) = Voltage (V) × Current (I)

Question 56

Fill in the blank: Electrical energy is usually measured in _____.

Answer 56

kilowatt-hours (kWh)

Question 57

What is the cost of using 1 kWh if the rate is 15 cents?

Answer 57

$0.15

Question 58

If a device uses 200 Watts for 10 hours, how many kWh does it consume?

Answer 58

2 kWh

Question 59

True or False: A higher efficiency means less energy wasted.

Answer 59

True

Question 60

What is the main factor that affects efficiency in machines?

Answer 60

Friction

Question 61

Multiple Choice: Which of the following is NOT a unit of power? A) Watt B) Joule C) Horsepower

Answer 61

B) Joule

Question 62

What term describes the amount of work done per unit of time?

Answer 62

Power

Question 63

Fill in the blank: The formula for calculating cost of electricity is _____.

Answer 63

Cost = kWh Used × Price per kWh

Question 64

True or False: Increasing voltage while keeping current constant increases power.

Answer 64

True

Question 65

What is the relationship between power, voltage, and current?

Answer 65

Power equals voltage times current.

Question 66

If a light bulb uses 60 Watts for 5 hours, how much energy does it consume in kWh?

Answer 66

0.3 kWh

Question 67

What is the efficiency of a machine that outputs 50 J of useful work from 100 J of input energy?

Answer 67

50%

Question 68

Multiple Choice: Which equation correctly represents electrical power? A) P = V × I B) P = I / V C) P = V + I

Answer 68

A) P = V × I

Question 69

What is the power consumed by a 120 V device drawing 3 A?

Answer 69

360 Watts

Question 70

Fill in the blank: The standard unit for measuring work done is _____.

Answer 70

Joules