| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
The Earth's rocks fall into three categories based on how they're formed. Which of the following is formed from the hardening of molten rock?
sedimentary |
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igneous |
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marble |
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metamorphic |
The Earth's rocks fall into three categories based on how they're formed. Igneous rock (granite, basalt, obsidian) is formed from the hardening of molten rock (lava), sedimentary rock (shale, sandstone, coal) is formed by the gradual despositing and cementing of rock and other debris, and metamorphic rock (marble, slate, quartzite) which is formed when existing rock is altered though pressure, temperature, or chemical processes.
Which of the following is the primary difference between a comet and an asteroid?
comets have an atmosphere |
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asteroids have a coma |
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asteroids contain frozen water |
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comets orbit the Sun |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
The gravitational interaction of Earth and the Moon is responsible for which of these?
seasons |
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day and night cycle |
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tides |
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the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.
Herbivores are __________ that subsist on producers like plants and fungus.
primary consumers |
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scavengers |
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secondary consumers |
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tertiary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
Water freezing or boiling is an example of which of the following?
heating |
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sublimation |
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cooling |
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phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.