Watch the video and answer the questions below.
1. What did sailors call the blue glow on top of their ships’ masts?
2. What actually causes the blue glow?
3. What is plasma?
4. How much of the visible universe is plasma?
5. How is plasma created?
6. Why is plasma considered a separate state of matter from gas?
7. What is lightning?
8. What is an everyday item that contains plasma?
9. What are stars?
10. What is the intergalactic medium?