Pre-viewing questions
- What is a comet?
- What is an asteroid?
- What is a meteor?
- What is a meteorite?
Watch the video from 33:00 to 39:30, and answer the questions below.
Birth of the Earth (50:05)
Questions
- In space, what temperature are meteors?
- Why were Tagish Lake meteorites so well preserved?
- Where did the Tagish Lake meteorites originate?
- What is the current leading theory for the origin of ocean water on Earth?
- What is zircon?
- Based on the evidence provided by zircons, how old is Earth's water?