lqc 14b exam qs

Question 1

Explain how the combustion products, from the burning of fuels, may lead to global warming.

Answer 1

production of greenhouse gases, these gases build up in the atmosphere which absorb heat energy, reflected from earths surface, increased levels of these gases increase the greenhouse effect

Question 2

Describe how an increase in greenhouse gases could cause the loss of sea ice.

Answer 2

UV light can pass through the greenhouse gases, heat energy cant pass back out, increasing the temperature of the earths atmosphere, high temperatures melt more of the ice and less ice will re freeze

Question 3

Explain why the loss of sea ice could result in a decrease in the number of polar bears.

Answer 3

less habitat, less seals to feed on, bears are not building up sufficient food reserves, polar bears have to swim further for food