The Earth's atmosphere Flashcards
(6 cards)
1
Q
What was the Earth’s early atmosphere formed by?
A
volcanic activity
2
Q
What did the Earth’s early atmosphere consist of?
A
mainly carbon dioxide Also small amounts of: -nitrogen -water vapour -ammonia -methane
3
Q
What is the atmosphere?
A
The relatively thin layer of gases that surround Earth.
4
Q
What is a carbon footprint?
A
The total amount of carbon dioxide and other greenhouse gases emitted over the full life cycle of a product, service or event.
5
Q
What did photosynthesis do to the atmosphere?
A
- Decreased the amount of carbon dioxide.
- Produced more oxygen, making the Earth’s atmosphere richer in oxygen, meaning animals could now survive.
6
Q
What are the (3) main greenhouse gases?
A
- carbon dioxide
- methane
- water vapour
