| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.82 |
| Score | 0% | 56% |
Which of the following is the formula for power?
\(P = w t\) |
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\(P = {w \over t}\) |
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\(P = {\vec{w} \over t}\) |
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\(P = \vec{w}t\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
In the water cycle, infiltration is most closely related to:
water table |
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rivers |
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oceans |
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runoff |
The water then accumulates as runoff and eventually returns to bodies of water or is absorbed into the Earth (infiltration) and becomes part of the water table, an underground resevoir of fresh water.
Which of the following is not a method of heat transfer?
reflection |
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convection |
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radiation |
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conduction |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
Secondary consumers that also eat producers are known as:
omnivores |
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scavengers |
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herbivores |
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carnivores |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.
The process of diffusion allows __________ to exchange oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells.
veins |
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red blood cells |
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arteries |
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capillaries |
Capillaries are small thin-walled vessels that permit the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells. This process of exchange is called diffusion.