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The rate of change of velocity over time.

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Arid climate-having little or no rain. Arid region-characterized by a severe lack of available water which prevents the growth and development of plant or animal life.

In digestion, absorption is the movement of nutrients from the intestine into the blood. 

An autotrophic organism can produce its own food from simple substances such as carbon dioxide, generally using energy from light or inorganic chemical reactions.

Astronomers are scientists who study the origin of the universe and its objects and how it works. As an astronomer, you can work in observational astronomy, using telescopes and cameras to look at the stars, galaxies and other astronomical objects, or in theoretical astronomy, where you'll use maths and computer models to explain observations and predictions.

Later in time than

The envelope of gases surrounding the earth or another planet.

In digestion, absorption is the movement of nutrients from the intestine into the blood. 

An autotrophic organism can produce its own food from simple substances such as carbon dioxide, generally using energy from light or inorganic chemical reactions.