| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
In the water cycle, infiltration is most closely related to:
runoff |
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water table |
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rivers |
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oceans |
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.
In the food chain, bacteria and fungi convert the organic matter in the dead bodies of plants and animals into simple nutrients. Bacteria and fungi are:
producers |
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primary consumers |
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decomposers |
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scavengers |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
What prevents blood pumped out of the ventricles from flowing back into the heart?
atria |
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platelets |
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capillaries |
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valves |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
compound |
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atom |
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element |
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molecule |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
Which of the following represents the largest value?
1 cL |
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1 kL |
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1 mL |
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1 ML |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.