What is two different ways to gather dna

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Select the correct answer. which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. c. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated. d. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea.

Which is an inner plant a. earth b. saturn c. jupiter d.neptune