Why does low air pressure usually indicate stormy weather?
Low air pressure makes it harder for clouds to form.
The air particles are packed together, making it easier for condensation to occur.
The air particles are spread out, allowing evaporation to easily occur.
The packed air particles move faster, causing storms to easily occur.

The graph represents the gravitational attraction between two equal masses vs. their distance apart, which statement best describes the information presented by the graph? a) distance is only a factor in space, not on earth. b) gravitational attraction is directly proportional to distance. c) gravitational attraction is inversely proportional to distance. d) gravitational attraction is not related to the distance between objects.

Which of the following is not a defining characteristic of plants?

Why is it important to study each branch of earth science?