Energy

Question 1

what is heat energy?

Answer 1

Heat energy changes the temperature of objects, state of objects and causes expansion

Question 2

What is light energy?

Answer 2

Light energy allows us to see things

Question 3

What is sound energy?

Answer 3

Sound energy is produced by vibrations and allows us to hear

Question 4

What is electrical energy?

Answer 4

This type of energy travels through conducting wires. Power stations, generators and batteries are sources of electrical energy

Question 5

What is potential (stored)?

Answer 5

Gravitational potential energy is the type of energy which objects have when they are held up high.

Stretched or compressed elastic materials or springs have elastic potential energy

Question 6

What is kinetic energy?

Answer 6

Moving objects have this type of energy

Question 7

What is chemical energy?

Answer 7

Food and fuels have this type of energy. The energy is released when they go through chemical changes.

Question 8

What is nuclear energy?

Answer 8

This type of energy is in the nucleus of atoms. Is it usually released when the nucleus splits or decays

Question 9

What is energy?

Answer 9

Energy is required to make anything change or happen

Question 10

State eight basic forms of energy

Answer 10

Heat, light, sound, electrical, potential (stored), kinetic, chemical and nuclear

Question 11

Can energy change from one form to another?

Answer 11

Yes

Question 12

Can energy be created or destroyed?

Answer 12

No

Question 13

Where do animals get energy from?

Answer 13

They get energy from food

Question 14

What is energy measured in?

Answer 14

Joules (j) and kilojoules (kj)

Question 15

What is our main source of energy?

Answer 15

The sun

Question 16

Describe the structure of an atom

Answer 16

In the middle of an atom is a nucleus which is made up of protons and neutrons. Electrons circle around the nucleus.

Question 17

How are more atoms created?

Answer 17

If a neutron collided into the nucleus of an unstable atom, the atom would split into two changing the nuclear energy into heat

Question 18

Advantages and disadvantages of solar power

Answer 18

Advantages: it is clean, can reduce house bills and is good for remote locations.

Disadvantages: it needs to be sunny and is not very efficient

Question 19

Advantages and disadvantages of hydro-electric energy

Answer 19

Advantages: it is reliable, can store energy as water, you can switch it on and off easily and it’s clean

Disadvantages: it can cause flooding and can damage habitats

Question 20

Advantages and disadvantages of biogas

Answer 20

Advantages: it is clean, has low cost and produces fertiliser

Disadvantages: it needs to be warm and is inefficient

Question 21

Advantages and disadvantages of nuclear

Answer 21

Advantages: a small amount of fuel produces a large amount of energy and there is not Co2 or So2.

Disadvantages: hazardous waste, must be stored safely, a large accident could be catastrophic

Question 22

Advantages and disadvantages of fossil fuels

Answer 22

Advantages: readily available and is easy and cheap to produce energy

Disadvantages: will run out, releases Co2, can cause acid rain and can be a cause of global warming

Question 23

Advantages and disadvantages of geothermal energy

Answer 23

Advantages: it is reliable and has a low carbon footprint

Disadvantages: it is location specific and can cause earthquakes

Question 24

Advantages and disadvantages of tidal/wave energy

Answer 24

Advantages: it is predictable, clean and there is no pollution

Disadvantages: affects marine life is expensive and tides only change every 6 hours

Question 25

Advantages and disadvantages of wind energy

Answer 25

Advantages: it is clean, cheap to run and no pollution

Disadvantages: it needs to be windy and makes a lot of noise

Question 26

What are the energy changes in a nuclear power station?

Answer 26

Nuclear-heat-kinetic-electrical

Question 27

The energy changes of a hydro electric power station?

Answer 27

Gravitational potential-kinetic-electrical