Asquare kilometer of forest has 200 deer. what is the term that is used to describe this number?

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Are the earth's ocean floor and continents the same age geologically? why or why not?