Measure the brightness of a star through two filters and compare the ratio of red to blue light.
Accelerating, because it’s going from standing still to running, so the speed increases
Boiling point of the fragments, for example Ethanol is 78 degrees C, and water is 100.
Gravity affects atoms the same way it affects all other matter. Every atom creates its own gravitational field which attracts all other matter in the universe. If you put a lot of atoms together, like in a planet or a star, all of the little gravitational fields add together, creating a much stronger pull.
Both reactions involve the presence of single elements. The difference is that synthesis has single elements on reactant side whereas decomposition has single elements on product side of a chemical equation.
