Elements emit colours when heated because electrons in atoms can have only certain allowed energies.Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours. See, for example, mercury and neon above. Those colours are as distinctive to each element as fingerprints are to people.
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Getting an after-school job and convincing friends to get a job too.
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b. Increased frequency of birth defects in fish populations in the pond
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5 presidentes los ultimos 5 años
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Neither the same nor the opposite
Explanation:
<em>A stitch in time saves nine</em> is an idiom meaning that it's better to deal with problems right away and spend less time doing that than later when more time is going to be needed.
<em>A penny saved is a penny earned </em>is an idiom meanings that saving money, even little by little, is as useful as earning more.
When we compare these two idioms, we can see that their meanings are neither the same nor the opposite.
