Density involves the amount of a material in a certain volume. When a material changes phases, it changes it
in density in a predictable way as the amount of
material stays the same but the molecules get farther
apart or closer together. Water has solid and liquid
states that do not follow these predictions of density in
the phases of matter.

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?