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Flashcards in Exam 1.2 Deck (13):
1

What are earths 3 main oceans?

Pacific, atlantic, Indian

2

How much of earths surface us covered by water?

71%

3

What are the components of earth?

- biosphere
- hydrosphere
- atmosphere
- lithosphere

4

What is a solar system?

Planets revolving around the sun because of the sun's gravity

5

What is biosynthesis?

Evolution of living cells from early non-living cells

6

What did the Miller-Urey experiment indicate about the origin of life on earth?

- simulation of ancient of water cycle
- life doesnt have to come from other life, but can be created through biosynthesis

7

What were the sources of earths atmosphere?

- gases released from volcanoes and earths chemically active interior

8

How were oceans created?

- earth cooled and gases formed water
- bombardment by gasses

9

How does density stratification explain the layering of earth?

The core is the densest part of earth, the lower the layers, the higher the density
- light elements migrate to surface forming crust
- gravity pulls iron and nickel towards the core

10

How did the solar system form from a solar nebula?

Formed from interstellar dust and hydrogen gas. Planets began as dust grains in orbit around central protostar

11

What are the benefits of the ocean?

- moderates temperature
- provides food
- provides resources
- shipping and communication

12

Planets are formed by accretion. What is accretion?

Clumping a seed materials into larger masses

13

What will happen to the earth in the future?

- sun will die and become a red giant
- engulfs inner planets
- shock waves spread earths components across space
- recycled into a new solar system