Answer:
element and compund
Explanation:
an element is the most basic substance that cannot be decomposed into anything simpler
an compound is a substance that is formed when two or more elements combine in constant ratio chemically
The awnser would be D the tilt on the earth on its axis
Answer:
D) the sum of all physical properties of a substance
Answer:
According to the current fossil record, scientists believe that the life on earth began about 3.5 billion years ago.
