Question 1

Which of the following best describes a positive feedback loop in the context of climate change involving ice and albedo?

Accepted Answer

Climate warming leads to ice melting, which lowers surface albedo, causing more energy to be absorbed and further warming.

Question 2

Given the following albedo values: snow ($$\alpha = 0.9$$), bare ice ($$\alpha = 0.5$$), and open ocean ($$\alpha = 0.06$$), which surface absorbs the most solar energy?

Accepted Answer

Open ocean

Question 3

If the albedo of a surface increases from $$\alpha = 0.1 to$$ $$\alpha = 0.8$$, what happens to the amount of solar energy absorbed by that surface?

Accepted Answer

It decreases

Question 4

Which of the following is an example of negative feedback in the climate system?

Accepted Answer

Warming increases evaporation, leading to more low clouds, which reflect sunlight and cool the surface

Question 5

A region experiences high temperatures, leading to increased evaporation and more low cloud formation. If low clouds have a high albedo ($$\alpha \u003e 0.4$$), what is the likely effect on the region's temperature?

Accepted Answer

Temperature will decrease due to more reflected energy

Question 6

Which sequence correctly represents the positive feedback loop involving ice and climate warming?

Accepted Answer

Climate warming → Ice melts → Lower albedo → More energy absorbed → More warming

Question 7

If the Earth's surface changes from being covered with snow ($$\alpha = 0.9) to $$open ocean ($$\alpha = 0.06$$), what is the change in the fraction of solar energy reflected?

Accepted Answer

A decrease from 90% to 6% reflected energy

Question 8

Which of the following best explains why deserts, with an albedo of $$\alpha = 0.4$$, are generally cooler than forests ($$\alpha = 0.1) $$during the day?

Accepted Answer

Deserts reflect more energy than forests

Question 9

In the negative feedback loop involving low clouds, which step directly counteracts the initial climate warming?

Accepted Answer

More low clouds with high albedo

Question 10

A scientist observes that after a period of warming, there is an increase in low cloud cover over the ocean. What is the most likely impact on the Earth's energy balance?

Accepted Answer

More energy will be reflected back to space

Question 11

Which of the following best describes the role of albedo in Earth's climate system?

Accepted Answer

Albedo determines the fraction of solar energy reflected by a surface

Question 12

If a region's surface albedo decreases due to melting ice, what is the expected effect on the region's temperature?

Accepted Answer

Temperature will increase

Question 13

Which of the following is NOT a plausible effect of decreased albedo in the Arctic?

Accepted Answer

Decreased atmospheric heating

Question 14

A feedback loop is considered 'positive' if:

Accepted Answer

It reinforces the initial stimulus

Question 15

Which of the following scenarios best illustrates a multi-step negative feedback loop involving clouds?

Accepted Answer

Warming → More evaporation → More low clouds → Higher albedo → More energy reflected → Cooling

Question 16

If the albedo of a surface is $$\alpha = 0.5$$, what fraction of incoming solar energy is absorbed?

Accepted Answer

$$1 - 0.5 = 0.5$$

Question 17

Which of the following is a direct effect of increased low cloud cover over the ocean?

Accepted Answer

Higher albedo

Question 18

Which feedback mechanism is most likely to accelerate climate warming in the Arctic?

Accepted Answer

Positive feedback from ice-albedo interactions

Question 19

If a region transitions from grassland ($$\alpha = 0.25) to $$forest ($$\alpha = 0.1$$), what is the expected change in energy absorption?

Accepted Answer

Energy absorption will increase

Question 20

Which of the following best explains why the loss of sea ice in the Arctic is considered a positive feedback mechanism?

Accepted Answer

Loss of sea ice decreases albedo, absorbing more energy and causing further warming

Feedback Loops and Albedo in Climate Regulation

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