Horsing around in the lab is always
ook when no experimenting is being done
ook because it is not dangerous
fine when you are alone
never allowed

Are substances released into the environment that in excess amounts cause damage

In the water cycle , when does water undergo a chemical change

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.