4.3

Question 1

Greenhouse gases

Answer 1

gases that trap heat and prevent it from leaving the Earth

Question 2

what is the greenhouse effect?

Answer 2

gases in earths atmosphere trap heat and keep it all from escaping into space, humans have impacted it by adding more greenhouse gases to the atmosphere

Question 3

What do ice cores tell us about temperature and CO2 levels for the last 800,000 years

Answer 3

temperature and CO2 levels rise and fall in consistent patterns and are closely linked; both are higher than they have ever been

Question 4

What is the difference between positive and negative feedback?

Answer 4

Positive feedback has a result that compounds or increases the initial stimulus that began the loop. Negative feedback has a result that cancels out the initial stimulus.