Question 1

Which of the following best describes the Greenhouse Effect?

Accepted Answer

The ability of the Earth's atmosphere to hold heat, making life possible, but potentially dangerous if intensified.

Question 2

Which greenhouse gas is most abundant in human-caused emissions and accounts for approximately 82% of greenhouse gases contributed by humans?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 3

What is the current atmospheric concentration of $$CO_2 as $$shown in recent measurements?

Accepted Answer

426 ppm

Question 4

Which of the following is a positive feedback loop that amplifies climate change?

Accepted Answer

Arctic sea ice melting, reducing Earth's albedo and increasing warming

Question 5

Which of the following gases is 265-310 times more potent than $$CO_2 as a $$greenhouse gas?

Accepted Answer

Nitrous oxide ($$N_2O)$$

Question 6

Deforestation contributes to climate change primarily by:

Accepted Answer

Releasing stored carbon dioxide into the atmosphere and reducing carbon sequestration

Question 7

Which of the following is NOT a natural cause of climate variation?

Accepted Answer

Deforestation

Question 8

What percentage of the sun’s energy is reflected back into our atmosphere?

Accepted Answer

About 30%

Question 9

Which of the following is an example of phenology?

Accepted Answer

All of the above

Question 10

Why is water vapor considered a powerful greenhouse gas in climate feedbacks?

Accepted Answer

It increases in the atmosphere as temperatures rise, amplifying warming through a positive feedback loop

Question 11

Which of the following best explains why ice core samples are valuable for studying past climate patterns?

Accepted Answer

They trap air bubbles that preserve the composition of the ancient atmosphere

Question 12

Which of the following is a direct impact of climate change on fish populations?

Accepted Answer

Fewer coldwater species and higher incidence of disease

Question 13

Which epoch is proposed to reflect the current era of significant human impact on Earth's systems?

Accepted Answer

Anthropocene

Question 14

Which of the following is a major source of methane ($$CH_4) $$emissions according to the study materials?

Accepted Answer

Enteric fermentation in livestock

Question 15

Which of the following is a likely consequence of increased global temperatures on forests?

Accepted Answer

Greater prevalence of insects and disease

Question 16

Which of the following best describes a mitigation strategy for climate change?

Accepted Answer

Switching to renewable energy sources to reduce greenhouse gas emissions

Question 17

Which of the following statements about the relationship between $$CO_2$$ and global temperature is supported by the data?

Accepted Answer

There is a strong correlation between rising $$CO_2$$ concentrations and increasing global temperatures.

Question 18

Which of the following is a reason why some species may be extirpated from local habitats due to climate change?

Accepted Answer

They cannot migrate quickly enough to suitable habitats.

Question 19

Which of the following is a direct effect of deforestation on the carbon cycle?

Accepted Answer

Decreased carbon sequestration and increased atmospheric $$CO_2$$

Question 20

Which of the following best explains why fluorinated gases are considered dangerous greenhouse gases?

Accepted Answer

They have a high global warming potential and can trap thousands of times more heat than $$CO_2.$$

Climate Change: Mechanisms, Evidence, and Biological Impacts

Study Guide - Practice Questions