Explanation:
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Answer: caffeine is a compound.
Explanation:
1) As stated c<span>affeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.
2) The definition of compound is a pure substance formed by chemical bonding of two or more fifferent elements. That means a defined ratio of the elements in the compound, which conferes uniform and equal properties to every part of the compound.
Some examples of compounds are salt (NaCl), water (H2O), vinegard (CH3 COOH).
A mixture combines several elements or compounds, not bonded by chemical bonds but mixed in ratios which may vary.
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Answer: A suspension is a heterogenous mixture containing large particles that will settle on standing. Sand in water is an example of a suspension. A solution is a homogenous mixture of two or more substances where one substance has dissolved the other.
Mechanical weathering<span> breaks rocks into small pieces and fragments. Chemical </span>weathering<span> changes mineral structures inside of rocks. ... </span>Erosion<span>, which is also called mass wasting, happens when the </span>weathered<span> pieces of rock roll down-slope, along with another agent, such as in the case of a mud slide or moving ice floe.</span>
