Communication In Space

For the past week we were learning about Mars and Space communication. We had to create a animation that had answers to question we got given. The questions were:

1. What are some ways we communicate on earth? Pick 3
2. How do these forms of communication work, what do they rely on or use?
3. Why can nobody hear you shout in space? 
4. Is radio communication instant? Why/Why not? 
5. What does this mean for space missions from earth to mars?

Here is the video with the answers