1. Describe the life cycle of an average stars

2. The process of nuclear fusion is the process that gives the sun and other stars the energy to shine through space . In your opinion, should nuclear fusion be possible on earth, would it be a better energy source? why or why not

If a population is growing quickly in a small area then what must increase as well

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.

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.