| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
the northern lights |
|
day and night cycle |
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tides |
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seasons |
Tides are caused by the gravitational interaction of Earth and the Moon.
Which of the following would be found on a reflecting telescope?
convex mirror |
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convex lens |
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concave lens |
|
concave mirror |
A concave (or converging) mirror bulges inward and focuses reflected light on the mirror's focal point where the mirror's angles of incidence converge. In contrast, a convex (or diverging) mirror bulges outward and diffuses the light waves that strike it. A common use of a concave mirror is in a reflecting telescope, a common use of a convex mirror is in the side view mirror of a car.
In the metric system, what prefix represents 10-3?
centi |
|
mega |
|
kilo |
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milli |
In the metric system, milli is the prefix for 10-3.
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
reflection |
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convection |
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conduction |
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radiation |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Blood pressure is generally highest in which of the following?
heart |
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capillaries |
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veins |
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arteries |
Arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood.