How is half-life most likely used with respect to this fossil? to find the mass of the fossil
to find the age of the fossil
to determine the species shown by the fossil
to determine if radiation is being emitted from the fossil

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Sugar is dissolved in water. which is the solute? sugar neither both water

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium