9.8-9.13 questions about earth's movements

You don't need to submit this homework.

Minimum request: Read the following questions and choose at least one topic you're interested in, think about it and make an educated guess-- a hypothesis--about the answer.

You are welcome to: after reaching the minimum request, try to design an experiment to test the hypothesis, and conduct the experiment and observe what actually happens. 

Questions about earth's movements

1. What will happen if earth doesn’t rotate?  

2. What will happen if earth doesn't spin around the sun? 

3. We know earth rotates from the west to the east (counterclockwise looking from the North Pole) and orbits the sun from the west to the east.  What will happen if earth's rotation direction and revolution direction are differ from each other? 

4. Where is the place people don’t have shadows, or their shadows "disappear"? 

5. From where on Earth could we observe all of the stars/ constellations? 

6. Where can we see the first light of a new year in China? 中国最早迎来新年第一缕阳光的地方在哪儿？

7.（选做，难）Where is the best place for building a rocket launch site? 火箭发射基地选在哪里比较好？