| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
Examples of primary consumers include:
rats |
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all of these |
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cows |
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fish |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
small intestine |
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large intestine |
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mouth |
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stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
As a cold front moves into an area, the heavier cool air __________ the lighter warm air that it is replacing.
pushes under |
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mixes with |
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pushes above |
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cancels out |
A cold front is a warm-cold air boundary with the colder air replacing the warmer. As a cold front moves into an area, the heavier cool air pushes under the lighter warm air that it is replacing. The warm air becomes cooler as it rises and, if the rising air is humid enough, the water vapor it contains will condense into clouds and precipitation may fall.
What type of cloud is responsible for fog?
cirrus |
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cumulus |
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stratus |
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cumulonimbus |
Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.
Which of the following is not a characteristic of the Sun?
formed 2.6 billion years ago |
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is a yellow dwarf star |
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is composed of hydrogen and helium |
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makes up over 99% of the mass of the solar system |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.