End of unit test 5

Which of the following energy resources are renewable?

• petroleum

• wind

• coal

• solar

Explain the difference between weather and climate.

Billions of years ago, the climate and the atmosphere on Earth were not able to support life. State at least two ways in which the early atmosphere of Earth was different from that of today.

Protons have a positive electric charge. (true or false)

Neutron have a negative electric charge. (true or false)

Electrons have a larger mass than protons and neutrons.​ (true or false)

Electrons have a positive electric charge.​ (true or false)

Gold jewellery is marked to tell you how pure the gold is. Which is the marking that has the most gold?

• 15 carat of gold

• 9 carat of gold

• 18 carat of gold

Pure diamond is made up of carbon atoms arranged in a particular way. How do pure diamonds differ from diamonds that contain other elements?

A measure of the amount of water vapour in the the atmospher is called ....

• weather

• climate

• humidity

• precipitation