| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.97 |
| Score | 0% | 59% |
In the food chain, omnivores may be which of the following?
secondary consumers or scavengers |
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secondary or tertiary consumers |
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primary or secondary consumers |
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primary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
Which of the following is igneous rock?
marble |
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sandstone |
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granite |
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shale |
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.
A subatomic particle found in the nucleus of an atom. It carries no electric charge. This desribes which of the following?
neutron |
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electron |
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atom |
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proton |
A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.
The angle of reflection is equal to which the following?
90° |
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refractive index |
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angle of incidence |
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focal point |
The law of reflection specifies how waves, including light waves, bounce off of surfaces. Specifically, the angle of incidence of the approaching wave is equal to the angle of reflection of the reflected wave as measured from a line perpendicular (90°) to the surface.
Which of the following describes the Earth's mantle?
primarily liquid |
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primarily solid |
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liquid |
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solid |
Mantle makes up 84% of the Earth's volume and has an average thickness of approximately 1,800 miles (2,900 km). It is dense, hot, and primarily solid although in places it behaves more like a viscous fluid as the plates of the upper mantle and crust gradually "float" along its circumference.