Question 1

Which of the following best describes the greenhouse effect?

Accepted Answer

Atmospheric heating caused by certain gases that are transparent to sunlight but absorb and reflect heat from Earth's surface.

Question 2

If the natural greenhouse effect did not exist, what would be the approximate average temperature of Earth?

Accepted Answer

$$-18 \, ^\circ \mathrm{C} + (-15 \, ^\circ \mathrm{C}) = -33 \, ^\circ \mathrm{C}$$

Question 3

Which of the following is NOT considered a greenhouse gas?

Accepted Answer

Nitrogen ($$\mathrm{N}_2)$$

Question 4

What is the primary reason that anthropogenic carbon contributes to climate change?

Accepted Answer

It injects ancient, stored carbon into the atmosphere at a much faster rate than natural processes.

Question 5

Which human activity is a major source of anthropogenic carbon?

Accepted Answer

Burning fossil fuels

Question 6

What is the main consequence of adding extra carbon dioxide to the atmosphere?

Accepted Answer

It upsets the balance of the carbon cycle, causing more carbon to stay in the air and leading to global warming.

Question 7

Which of the following is a possible severe consequence of global warming?

Accepted Answer

Melting of polar ice caps

Question 8

How does deforestation contribute to global warming?

Accepted Answer

By removing natural carbon sinks, leading to more carbon dioxide in the atmosphere

Question 9

Which process is responsible for short-term carbon storage in the carbon cycle?

Accepted Answer

Photosynthesis and respiration

Question 10

A factory releases large amounts of $$\mathrm{CO}_2$$ during cement production. This is an example of which type of anthropogenic carbon source?

Accepted Answer

Industrial process

Question 11

Which equation best represents the combustion of methane, a process that contributes to anthropogenic carbon?

Accepted Answer

$$\mathrm{CH}_4 + 2\mathrm{O}_2 \rightarrow \mathrm{CO}_2 + 2\mathrm{H}_2\mathrm{O}$$

Question 12

Which of the following best explains why the Earth's temperature is suitable for life?

Accepted Answer

The greenhouse effect keeps Earth's average temperature around $$15 \, ^\circ \mathrm{C}.$$

Question 13

Which of the following scenarios would most likely lead to a decrease in atmospheric $$\mathrm{CO}_2$$ levels?

Accepted Answer

Expansion of forests (reforestation)

Question 14

Which statement about heat flow is correct?

Accepted Answer

Heat flow is the transfer of thermal energy from a warmer object to a cooler object.

Question 15

Which of the following is a long-term carbon storage reservoir?

Accepted Answer

Deep ocean sediments

Question 16

A city experiences more frequent and severe storms over several decades. Which process is most likely contributing to this change?

Accepted Answer

An increase in global warming due to higher greenhouse gas concentrations

Question 17

Which of the following best describes the difference between natural and anthropogenic carbon in the atmosphere?

Accepted Answer

Anthropogenic carbon is released by human activities at a much faster rate than natural processes.

Question 18

Which of the following is a direct effect of strengthening the greenhouse effect?

Accepted Answer

A rise in global average temperatures

Question 19

Which process removes carbon dioxide from the atmosphere and stores it in plants?

Accepted Answer

Photosynthesis

Question 20

Which of the following best explains why the carbon cycle was balanced before the Industrial Revolution?

Accepted Answer

The amount of carbon released was roughly equal to the amount absorbed.

The Greenhouse Effect, Global Warming, and the Carbon Cycle

Study Guide - Practice Questions