Answer:
it keeps the heat in and the bugs and flys out
Explanation:
Boiling is the process of converting a substance from liquid state to gaseous state. If the heating curve is reversed, the process also is reversed from converting gaseous state to liquid state. In this case, the reverse of boiling is condensation. So the answer is point of condensation.
Nitrogen. air consists 78% of nitrogen gas
An element is a pure substance made up of only one kind of atom. An element is composed of atoms in which it is composed of neutrons and protons. The nucleus is surrounded by electrons. The answer to this problem is A. element
10 is mixture of elements and compounds
11 is compound
12-15 are mixture of compounds
