This is true, comets have long, indefinite life spans.
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Population density is used to describe the population per unit, so basically, population density..
Answer:
A
Explanation:
worms eat compost burried underground.
Answer:
Factors that affect the speed of a river include the slope gradient, the roughness of the channel, and tides.
Explanation:
The answer to the question stated above is letter b. <span> <span>a meteor or asteroid colliding with Earth
</span></span> <span>The mass extinction at the end of the Mesozoic Era was caused by </span>a meteor or asteroid colliding with Earth. This was said to happen about 65 million years ago.