Energy

Question 1

Energy

Answer 1

Energy is the
ability to do work
such as move,
burn, heat, etc.

Energy is
measured in units
called Joules

Question 2

Potential energy

Answer 2

This is stored energy that
is just waiting to do work such as a coiled
spring or elastic band

Question 3

Kinetic energy

Answer 3

The energy that moving
things have ie, a windmill turning or a car
moving

Question 4

Heat energy

Answer 4

Heat is energy because it can
cause things to move

Question 5

Light energy

Answer 5

Light can move things in a
Crookes Radiometer or in a solar powered
calculator

Question 6

Sound energy

Answer 6

If you put your head near a
loudspeaker you can feel that air being
moved by sound energy

Question 7

Electrical energy

Answer 7

This energy can make
things like extractor fans move

Question 8

Chemical energy

Answer 8

This is the type of energy
stored in fuels such as coal and oil, it is also
stored in the food we eat and in batteries

Question 9

Nuclear energy

Answer 9

this energy is stored in the
nucleus of atoms

Question 10

Law of conservation of energy

Answer 10

Energy cannot be created or destroyed it
can only be changed (converted) from one
form to another

Question 11

Circuits

Answer 11

A circuit is made up of a battery, some wires
and different types of equipment and can be
used to observe energy conversions

Question 12

Energy supplies

Answer 12

There are 2 types of energy source
1. Renewable Energy Sources
2. Non Renewable energy Sources

Question 13

Renewable energy sources

Answer 13

Renewable energy sources are constantly
being replaced by nature

Question 14

Solar energy

Answer 14

solar panels on buildings use
the sun’s energy to heat water

Question 15

Hydro electric energy

Answer 15

Dams hold back
water and then let it drop onto a wheel to
turn a generator turbine to make electricity

Question 16

Wind energy

Answer 16

Wind can turn windmills which
generate electricity

Question 17

Wave energy

Answer 17

The movement of large floats
by the energy in waves could be used to
generate electricity

Question 18

Biomass energy

Answer 18

Some plants produce oils
others can produce fuels such as alcohol and
methane gas

Question 19

Geothermal energy

Answer 19

The temperature under
the Earth’s surface increases with depth this
heat can be used to heat water in some
places

Question 20

Advantages of renewable energy

Answer 20

Renewable Energy does not cause pollution
They will not run out
They are fairly safe to use

Question 21

Disadvantages of renewable energy

Answer 21

They are expensive to develop and set up
More research needs to be done into how to
make them good sources of energy

Question 22

Fossil fuels

Answer 22

Oil, coal and natural gas are all examples of
fossil fuels

They were formed over millions of years
from the bodies of dead plants and animals

Once they are burned they are gone

They will only last another 200- 300 years at
present day usage

They cause pollution and damage to the
atmosphere

Question 23

The suns energy

Answer 23

The sun allows plants to make
food which stores chemical
energy used by every animal on earth

The sun heats the oceans and air creating
wind, currents, waves and rivers

The heat energy made by the sun can be
used to heat water

The light energy from the sun can be
changed to electrical energy

Question 24

Nuclear energy

Answer 24

When the nucleus of an atom is split large
amounts of energy are released from it

If this energy is uncontrolled dangerous
explosions may happen

Question 25

Advantages of nuclear energy

Answer 25

1. In medicine nuclear
   radiation is used to
   kill cancer cells
2. Radiation can be
   used to sterilise
   food
3. Radiation can
   produce electricity
4. It will not run out
   like fossil fuels

Question 26

Disadvantages of nuclear energy

Answer 26

1. The waste products of nuclear energy are
   radioactive and are harmful to the
   environment and living things
2. The waste products last in the environment
   for a very long time
3. If the nuclear energy gets out of control
   huge explosions may happen such as that in
   Chernobyl in 1986