A scientist describes the molecules of a substance as it changes from one state of matter to another. She states that the speed of the molecules slows down over time. Which phase change could the scientist be describing? A. gas to liquid
B. liquid to gas
C. solid to gas
D. solid to liquid

What layer of the atmosphere is directly above the troposphere?

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.

Why is retrograde motion an apparent motion