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The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.
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pls mark brainlest The chemical composition of an igneous rock tells us about the origin of the magma, beginning with which type of rock melted within the earth to form the magma in the first place, and how deep in the earth the melting occurred. Once magma has formed inside the earth, its composition may be modified.
Well now not only are you killing less aqua animals. But as well as you are affecting less drinking water. But the main town supply of fish and water come from there, thus making it dangerous and hazardous after being infected.
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The answer is <span>root hairs</span>
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Hot air rises. Cool air comes rushing in to take its place.
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