What amount of earths total water supply is usable fresh water?

A. 25%

B. Less than 1%

C. 50%

D. 75%

Wtite a brief summary about energy flow

Why might the plutoid haumea have been named after the mother goddess of Hawaii

What percentage of scientists believe that global temperatures are rising in part because of human activity?

What type of communication occurs when a monkey gives a special, loud cry if it sees a bird of prey that might threaten the troop?

Which substance is the most acidic? A. sodium hydroxide B. water C. tomato juice D. lemon juice

How does a large complex system like the earth system operate

How many poops does he average human take

What describes the long history of earth

A Ligustrum plant cell is exposed to an aqueous solution having sodium and chloride concentrations higher than the sodium and chloride concentrations of the cell interior.

2. Why is nuclear fusion able to sustain the life of a star over a long period of time without the input of outside energy?