4.3

Question 1

What are greenhouse gases?

Answer 1

Gases in the atmosphere that absorb and/or reflect infrared light to heat the planet.

Question 2

What are positive feedback loops?

Answer 2

X happens to Y which positively affects X.

Question 3

What are negative feedback loops?

Answer 3

X happens to Y which negatively affects X.

Question 4

What is the greenhouse effect?

Answer 4

Heat is absorbed and released by greenhouse gases, warming the Earth.

Question 5

What do ice cores tell us about CO2 and temperatures from previous years?

Answer 5

Ice cores can reveal how high CO2 levels were and how high the temperature was at different times.

Question 6

Why is the greenhouse effect important?

Answer 6

Without it, the Earth would be much colder.

Question 6

Is helium a greenhouse gas?

Answer 6

Nah

Question 7

Is CO2 a greenhouse gas?

Answer 7

Yeah

Question 8

Is O2 a greenhouse gas?

Answer 8

No

Question 8

How have humans affected the greenhouse effect?

Answer 8

Humans have increased the levels of greenhouse gases which increased the greenhouse effect.

Question 8

Is CH4 (Methane) a greenhouse gas?

Answer 8

Yep

Question 9

Is H2O a greenhouse gas?

Answer 9

Yes