Topic 5- (Climate change and cuases)

Question 1

What is weather

Answer 1

State of atmoshpere at a specific time

Question 2

What is climate

Answer 2

The general weather patterns in an area over a long period of time

Question 3

What is an Ecosystem

Answer 3

A community of abiotic and biotic organisms that interact

Question 4

What period does the Earth cycle through

Answer 4

-Glacial
-Non Glacial

Question 5

EVIDENCE: validitity
- ice cores
- Co2 levels
- tree rings

Question 6

What are the natural cuases of climate change?

Answer 6

• Volcanic eruptions
• The Milankovitch cycle
• Sun spots

Question 7

How do volcanic eruptions cuase climate change?

Answer 7

• Release ash which blocks synlight + lowers temp in shorterm
• Release CO2 cuasing longterm global warming

Question 8

How/which volcanic eruption started the Quaternary period?

Question 9

What are the three points of the Milankovitch cycle

Answer 9

• Earth’s Obliquity (angle)
• Earth’s Eccentricity (orbit)
• Earth’s Precession (wobble)

Question 10

How does the Earth’s Eccentricity cuase climate change?

length + affect

Answer 10

-100,000 years (complete orbit)
-Circular to eliptical
- Cuases period closer to the sun
——–> NONE atm, currently in circular orbit, meaning should be no extremes

Question 11

How does the Earth’s Obliquity cuase climate change?

Angles, Length, affect (compare 9k years ago)

Answer 11

-22.1° vs 24.5°

-41,000 years
——>Slightly extremer summer+ winter at 23.4°

Question 12

How does the Earth’s Precession cuase climate change?

Length, affect

Answer 12

-26,000 years
—-> emphasises conditions due to Obliquity and Eccentricity