Homework Help: Earth Science

Posted by John on Monday, November 24, 2008 at 1:08pm.

1. Is it true that since energy cannot be created nor destroyed, the total energy of the river system remains constant?

2. What is the source of energy that powers the water cycle?
a. sunlight insolation
b. kinetic energy
c. radioactive decay
d. gravitational potential energy

3. What is the source of energy that powers the weather?
a. sunlight insolation
b. chemical potential energy
c. radioactive decay
d. gravitational potential energy

Thank you.

Earth Science - drwls, Monday, November 24, 2008 at 1:32pm
1. Energy ios conserved in CLOSED systems. A river system is not a "closed" system. Energy and matter are free to enter and leave, and so energy is not conserved.

2.a
3.a

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