before the quarry was dug, the land contained more vegetation . what impact has this change most likely had on the local ecosystem

I'm into politics, why am i getting these questions? it's 4: 30 am in texas. my paper is due in 2 days. i'm the one needing in political science

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Combustion is the act or process of burning. therefore, i believe the answer is  a: burning wood.