Science

Question 1

What are the nine different types of energy?

Answer 1

Nuclear
Heat
Light
Sound
Electrical
Chemical
Kinetic
Gravitational potential 
Elastic potential.

Question 2

Where does nuclear energy come from?

Answer 2

The energy comes from changes from the nucleus of an atom.

Question 3

What does the conservation of energy state?

Answer 3

It states that the total amount of energy remains constant.

Question 4

How to describe the energy transfer for a phone?

Answer 4

The battery contains chemical energy which transfers electrical energy into the phone powering it and also transferring light energy.

Question 5

What is meant by the term closed system?

Answer 5

Closed system is a physical system that does not allow certain types of mass and energy transfers in or out of the system.

Question 6

What is an example of a closed system?

Answer 6

An example of closed system would be a thermos.

Question 7

What is the equation for work done?

Answer 7

Force times distance.

Question 8

What is an independent variable?

Answer 8

A variable that you choose to change.

Question 9

What is work done measured in?

Answer 9

Joules (J)

Question 10

What is the energy transfer for a bungee jumper?

Answer 10

The energy is transferred from the gravitational potential energy store to the kinetic energy store as the jumper accelerates.

Question 11

What is force measured in?

Answer 11

Newtons (N)

Question 13

What is a control variable?

Answer 13

A control variable is a variable that you keep the same.

Question 14

What is Hooke’s Law?

Answer 14

A law that the strain in a solid proportion to apply stress within the elastic limit of that solid.

Question 15

Where does the UK mainly get their energy from?

Answer 15

UK uses coal, gas and uranium.

Question 16

How is biofuel produced?

Answer 16

Biofuel is a fuel that is produced through things like anaerobic digestion.

Question 17

What can biofuel be used for?

Answer 17

Biofuel can be used for transportation, heat.

Question 18

How does wind produce electricity?

Answer 18

Wind produces electricity by using a wind turbine that’s connected to a generator.

Question 19

How do you work out kinetic energy?

Answer 19

0.5 times mass times (speed)2

Question 20

How does a solar panel work?

Answer 20

Solar panels work by allowing light particles to knock electrons from atoms and that generates a flow of electricity.

Question 21

What are the names of the poles of a magnet?

Answer 21

The Names of the poles would be north and south.

Question 22

What are some magnetic metals?

Answer 22

Iron, nickel and cobalt.

Question 23

What is the effect of increasing the current on the magnetic field around a wire?

Answer 23

The effect is that the current increasing would make the magnetic field more powerful around the wire.

Question 24

How do you turn a magnet into an electromagnet?

Answer 24

Use a pair of wire strippers to remove a few centimeters of insulation from each end of the wire. Neatly wrap the wire around the nail. The more wire you wrap around the nail, the stronger your electromagnet will be. Make certain that you leave enough of the wire unwound so that you can attach the battery.

Question 25

How do you demagnetise a magnet?

Answer 25

You can demagnetise a magnet by heating or hammering the magnet.

Question 26

What are the greenhouse gasses?

Answer 26

Water vapour (H2O) carbon dioxide (CO2) 
Methane (CH4)
Nitrous oxide (N2O).

Question 27

Ways to reduce carbon footprint?

Answer 27

Stop eating meat so that the meat doesn’t destroy fresh water.
Unplug devices so that energy doesn’t get wasted.
Drive less so that it doesn’t release carbon from its fuels getting burnt.
Plant a garden so that plants absorb the carbon dioxide and turn it into oxygen.
Eat local so the foods don’t have to get flown or driven in.

Question 28

Definite carbon footprint?

Answer 28

The amount of carbon dioxide released into the atmosphere as a result of actives.

Question 29

What are some atmospheric pollutants?

Answer 29

Particle pollution, ground level ozone, carbon monoxide, sulphur oxides, nitrogen oxides, lead.

Question 30

Where did methane and ammonia come from?

Answer 30

Methane and ammonia came from organisms similar to bacteria.