Physics- Energy

Question 1

Gravitational potential energy is stored by objects when?

Answer 1

Lifted off the ground

Question 2

Fill in the gaps.

We measure energy in _____. A joule is a very small amount of energy, so energy is often given in ______.

Answer 2

1. Joules

2. Kilojoules

Question 3

Name some advantages and disadvantages of coal.

Answer 3

Advantages- it provides fuel and electricity

Disadvantages- it’s harmful. Mining is one of the most dangerous jobs in the world.

Question 4

Advantages and disadvantages of oil

Answer 4

Advantages- relatively inexpensive to extract
Reliable and dependable source of energy
Gives us the power to drive places

Disadvantages- burning gasoline is harmful to the environment
It releases hazardous gases and fumes in the air that we breath
Possibility of an oil spill

Question 5

Advantages and disadvantages of natural gas

Answer 5

Advantages- inexpensive to extract and is a “cleaner” fossil fuel than oil or coal
When it is burnt is only releases carbon dioxide and water vapour
This is healthier than burning coal

Disadvantages- extracting natural gases can cause environmental problems
The water sources, used for drinking or bathing, can become contaminated and unsafe

Question 6

Advantages and disadvantages of nuclear

Answer 6

Advantages- is a popular way of generating electricity around the world
They do not pollute the air or emit greenhouse gases
They can be built in rural or urban areas and do not destroy the environment around them

Disadvantages- difficult to harvest
Nuclear plants are complicated to build and run
Communities do not have the things they need to develop a safe and reliable energy program

Question 7

What is geothermal energy?

Answer 7

It is heat within the earth.

Question 8

Fill in the gap.
Geothermal energy is _______ energy because heat is continuously produced inside the earth.
What is the energy transfer of this type of energy?

Answer 8

Renewable

Heat energy to electric energy

Question 9

What’s tidal energy? What’s the energy transfer?

Answer 9

It is a form of power produced by the natural rise and fall tides caused by the earths gravitational interaction between Earth, the sun and the moon.
Gravitational potential energy to kinetic energy to electric energy

Question 10

What’s hydraulic energy and what is the energy transfer?

Answer 10

It is a renewable source of energy that generates power by using a dam or diversion structure to alter the natural flow of a river or other body of water.
Gravitational potential energy, kinetic energy and electric energy

Question 11

What’s solar energy?

Answer 11

Solar energy is any type of energy generated by the sun.

It’s transferred from the sun by radio action

Question 12

What’s wind energy and what is it caused by?

Answer 12

Wind energy is a form of solar energy.

The wind is caused by the movement of air. The wind turns a wind turbine which generates the electricity.

Question 13

Are fossil fuels renewable or non renewable energy resources?

Answer 13

They are non renewable

Question 14

Choose which word goes where.
Energy cannot/can just disappear and you can/cannot end up with more than you lol had at the start
Energy can/cannot be created or destroyed only transferred.

Answer 14

Cannot
Cannot
Cannot

Question 15

Can friction between surfaces make them vibrate producing sound?

Answer 15

Yes

Question 16

Fill in the gaps or choose the right word.
Coal is _______resource because it will\wont run out. It is called a ______ because it took millions of year to form. Wind is a _____
because it won’t be used up.

Answer 16

Non renewable
Will
Fossil fuel
Renewable resource

Question 17

Remember!

Answer 17

mW ÷ 1000= W ÷ 1000= kW x 1000= W x 1000= mW