Find the heights of the first three blades of grass by clicking the tip of each blade. Measure the heights to the nearest tenth of a centimeter. Record the heights in Table A.
8.2
Now that you have the heights of all eight blades of grass, calculate the average height of the grass. Record the average height of the grass in Table A of your Student Guide.

What is the average height?
cm

you need to have a picture of the atom that way we can answer it

b.false that your answer

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.