The number of green bodied insect would probably increase in the grass habitat. The insects that are green would be harder to spot by predators and therefore more likely to survive and produce offspring. The process of natural selection would favor the green color of the body and the future generations will have an increase in numbers of green bodied individuals over the tan bodied individuals.
Use the pH color scale. It shows acidity level of both acids and bases. You dip one of the pH strips into whatever liquid you choose, and then compare the new color of the pH strip to the colors on the scale. This will tell you the level of acidity. pH scale can be found below. As you can see, the brighter colors are more acidic than the darker and duller colors.
Density - Calculated from measurements of mass and volume
Atom - the basic particle of matter
Motion - calculated from measurements of distance and time
Energy - can change form and move matter
Can't see the last one but you know process of elimination soo
These are the most common symptoms associated with PSTD