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| 1 | |
What is the difference between an open system and a closed system? |
| | A) | Energy and matter cross the boundaries of an open system, while only matter crosses the boundaries of a closed system. |
| | B) | Energy and matter cross the boundaries of an open system; only energy crosses the boundaries of a closed system. |
| | C) | Only energy crosses the boundaries of an open system; energy and matter cross the boundaries of a closed system. |
| | D) | Only energy crosses the boundaries of an open system; only matter crosses the boundaries of a closed system. |
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| 2 | |
What is a feedback loop? |
| | A) | It is a system in which energy and matter cross a system’s boundary. |
| | B) | It is a system that allows energy, but not matter to cross the system’s boundary. |
| | C) | It is a process in which part of a system’s output is returned to the input. |
| | D) | It is a summary of how energy from the Sun enters, moves through, and leaves Earth. |
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| 3 | |
What is the function of a positive feedback loop? |
| | A) | It increases the effects of the interacting parts. |
| | B) | It decreases the effects of the interacting parts. |
| | C) | It helps to maintain a system’s equilibrium. |
| | D) | It acts to prevent, slow, or reverse changes in a system. |
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| 4 | |
What is the name for energy that travels outward as waves from a source? |
| | A) | positive feedback loop |
| | B) | negative feedback loop |
| | C) | conduction |
| | D) | electromagnetic radiation |
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| 5 | |
What are the three ways that heat can be transferred? |
| | A) | thermohaline circulation, radiation, and conduction |
| | B) | radiation, conduction, and convection |
| | C) | global warming, radiation, and convection |
| | D) | global warming, radiation, and conduction |
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| 6 | |
How does convection transfer heat? |
| | A) | Convection moves warm air from the atmosphere downward and moves cool air from the ground upward. |
| | B) | Convection moves cool air from the atmosphere downward and moves warm air from the ground upward. |
| | C) | Convection causes air to heat up through collisions between molecules in the ground and in the air. |
| | D) | Convection causes air to heat up as energy travels in the form of waves. |
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