"lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air)
Answer:
ionic bond
Explanation:
Covalent bonds are formed when two or more atoms share electrons between them. So two chlorine anions form an ionic bond with one magnesium cation for form MgCl2, a neutral chemical compound.
The answer would be C) Observe and ask questions because if we do process of elimination we see that drawing conclusions is NOT the first step, forming a hypothesis and illustrating the process is part of the method, but NOT the first step.
I believe the answer is: in order not to write very big or very small number values
