Which of a planet's fundamental properties has the greatest effect on its level of volcanic and tectonic activity

How do oceanographers measure the salinity of ocean water?

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Is a state government creates a new tax to fund schools a example of checks and balances