Atmosphere Quizzes Flashcards Preview

C1 > Atmosphere Quizzes > Flashcards

Flashcards in Atmosphere Quizzes Deck (13):
1

What do scientists look to for how the early atmosphere was?

planets and moons that have no life

Volcanoes

Antarctic ice cores (trapped gases)

2

What gases do volcanoes release?

Carbon dioxide, water vapour

Little Methane, nitrogen and ammonia

3

What was early atmosphere made up of?

Little to no Oxygen
Large amount of Carbon dioxide
Water vapour + small amounts of other gases

4

How were oceans formed

Water vapour released from volcanoes condensed
as earth cooled down

5

Why is it difficult to be certain about the early atmosphere?

There is only limited evidence
conflicting evidence like Titan=98% nitrogen and mars and venus mainly carbon dioxide

6

How was the early CO2 reduced

Dissolved into oceans

Got locked up in marine organisms, buried under layers of sediment, in carbonate rocks

Plants used it for photosynthesis

7

Current nitrogen percentage

78

8

Current oxygen percentage

21

9

Current argon percentage

0.9

10

Current carbon dioxide percentage

0.04

11

Name the current atmosphere's gases

Nitrogen
Oxygen
Argon
Carbon dioxide

12

How did oxygen affect the early atmosphere

Killed off unadapted, allowed others to survive

Formed ozone layer (O3), blocks harmful rays and allowed life to evolve

Reduced the carbon dioxide amount

13

Name the ways the atmosphere is being changed now

Human activity
+ CO2 Fossil fuels
+ CO2 Deforestation
+ CH4 Livestock farming

Volcanic activity
+ Sulfur dioxide (+ light+ H2O+ O2 = smog)
+ Carbon dioxide