When plants undergo photosynthesis, they make food for themselves and release
oxygen as a byproduct. A scientist measured how much oxygen was produced under
different light intensities. She had hypothesized that the amount of oxygen produced
would increase consistently with the light intensity. Her results are shown in the
table below.
Does the scientist results support her hypothesis?

The answer is "No; levels of oxygen increased and then began to level off despite increasing light intensity."

Explanation: because the graph is consistent until the intensity quickly increases then the oxygen produced varies in number.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.