| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.85 |
| Score | 0% | 57% |
Meteoroids, meteors and meteorites are categorized based on which of the following?
their temperature |
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their location |
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their density |
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their size |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Examples of secondary consumers include:
plankton |
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wolves |
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grasshoppers |
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chickens |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.
Which of Earth's layers has weather?
troposphere |
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thermosphere |
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mesosphere |
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stratosphere |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
more |
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double the number of |
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equal numbers of |
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fewer |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
An asteroid belt holds many of the asteroids in our solar system. It is located between the orbits of which planets?
Mars and Earth |
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Jupiter and Saturn |
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Mercury and Venus |
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Mars and Jupiter |
The solar system also contains over a million rocky fragments of at least 1km in diameter called asteroids as well as millions more with smaller diameters. Many of these asteroids are an asteroid belt between the orbits of Mars and Jupiter.