Answer:
D
Explanation:
The atmosphere is not an eycosystem
Answer:
The valence electrons have a role in the bonding of two atoms. The nuclei of each atom are drawn together by their attraction to the valence electrons of the other atom. As the atoms are drawn together by their attractions, electrons from each atom are drawn to the nuclei of both atoms, where they are "shared."
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It became clear in the 1970's
3. The water cycle affects the weather i various ways. For instance, it can help control how and when precipitation is present and without the water cycle the weather wouldn’t work as consistently.
Genes and the environment can affect an organisms traits
