How was ozone gas formed on planet earth?  Why is it considered a significant event in the formation of earth’s climate?

Your assignment must include a title page, the course number, the instructor’s
name, your name, and student number, the date, and your TAs name. Margins must be 2.5 cm on all sides. Use Times New Roman font with a point size of 12. Line spacing must be set at 1.5 lines.
QUESTIONS:
1. Describe the conditions before our planet earth was born. What were the series of events which created our planet? How and when was earth’s moon formed?
2. What are stromatolites? Why are they considered significant in the evolution of
life?
3. Short answers:
a) What were the first creatures to develop a spine?
b) Name the fish that used its fins as legs to push itself out of the water?
c) What were these creatures called once they became land dwellers?
d) What is the name of the first land plants?
4. Dragonflies, spiders, and other bugs that we see today were the first creatures to crawl on the land. In what way were they different from today’s bugs and why?
5. How was ozone gas formed on planet earth?  Why is it considered a significant
the event in the formation of the earth’s climate?
6. One and half billion years ago, mysterious forces hidden beneath the surface thwasere shaping our planet. What were the processes at work and how did they shape our planet?
7. Approximately 4 million years ago, explain what conditions led to human evolution and migration out of Africa?
8. According to your opinion, what are the three major events that created and shaped our planet as we know it today? Hint: Only one out of three is the most important
the event, as explained in the documentary, the rest 2 is based on your opinion