2. Experiment: Click Play and hunt peppered moths on light tree trunks for five years. In each year, try to capture as many moths as you can. Note: You can use the spacebar on your keyboard to quickly advance
to the next tree.
After 5 years, select the TABLE tab and record the percentages of each moth type. (Note: The table
shows current populations of each moth, not the number of captured moths.)
Year
Light moths
Dark moths
1
2
3
4
5
3. Analyze: What do your results show?
they all show the same percentage

yes

ya te ayud espera

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.