Descent Into Icehouse

Question 1

Explain the Himalayan uplift hypothesis

Answer 1

Uplift of the Himalayan/Tibetan plateau increased weathering rates
Caused decreased co2 thus cooling the planet
Negative feedback response

Question 2

As you increase silicate weathering what happens to co2 levels

Answer 2

Decrease co2 levels and decrease temperature

Question 3

How is co2 reconstructed (give 4 main ways)

Answer 3

Fossil stomata (more stomata = less co2)
Anolent soils
Carbonate nodules
Foraminifera shells

Question 4

What emerged in the Miocene

Answer 4

Grasslands

Question 5

Importance of grasslands

Answer 5

Figured out a new form of photosynthesis which required more water, meant they could gather co2 faster and run primary production and chemical reactions faster

Question 6

When was the first evidence of humans walking

Answer 6

3.7Ma

Question 7

Who were the first to use stone tools (2.5 Ma)

Answer 7

Homo habilis

Question 8

Who were the first to use fire (2Ma)

Answer 8

Homo erectus

Question 9

When did hominina diverge from chimps

Answer 9

6Ma