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ANSWER:
Index Fossils can be used to identify a specific period of time
Answer: 6 is the wavelength has decreased.
Explanation:
It’s A because when changing it to scientific notation it goes to 2.75 and when going to the left from the decimal point it is negative
Atoms bound together and form molecules. Molecules are a little more complex than atoms. For example water is composed of two hydrogen atoms and one oxygen atom which are both gases. Properties of oxygen and hydrogen are completely different than water molecules.
