PLEASE HELP energy plays an important role in the way that mineral crystals form. compare two examples of rocks from the previous screen . construct an explanation for how energy affects the crystal size of each of the rocks

The rocks were obsidian ,rhyolite porphyry and granite​

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?