1. Which of the following is an example of a chemical reaction? * O A. mixing lemonade powder with water
O B. burning marshmallows over a fire
O C. melting butter in a pan
D. boiling water on a stove

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