Our Evolving Atmosphere Flashcards
1
Q
When Animals Eat Plants, Some of this __________ can be Transferred to the Animal Tissues, Including their Skeletons and Shells.
A
Carbon.
2
Q
What Makes Up 0.9% of the Earth’s Atmosphere Today?
A
Argon.
3
Q
What Makes Up 0.1% of the Earth’s Atmosphere Today?
A
Neon, Krypton and Xenon.
4
Q
Photosynthesis by Algae and Plants ______________ the Percentage of Carbon Dioxide in the Early Atmosphere.
A
Decreased.
5
Q
Any Ammonia and Methane was Removed by Reactions with Oxygen, One Oxygen has Been Formed by _________________.
A
Photosynthesis.
6
Q
80% of the Earth’s Atmosphere Today is _____________.
A
Nitrogen.
7
Q
20% of the Earth’s Atmosphere Today is _____________.
A
Oxygen.
