Unit 2 - Global Climate

The Earth's atmospheric energy b_____ demonstrates what happens to the received solar energy from the Sun.

Approximately what percentage of solar energy reaches the Earth’s surface?

• 20%

• 35%

• 50%

• 65%

Identify which of the following is NOT a greenhouse gas

• Carbon dioxide

• Methane

• Ozone

• Oxygen

• Nitrous oxide

Global d______ is the cooling of air temperature due to pollution. Sulphur dioxide increases the reflection of radiation from the Sun back into space, cooling the Earth's lower atmosphere or troposphere.

True or False? Polluted air leads to global dimming because sulphur dioxide provides more sites for water to bind to.

• True

• False

Complete the positive feedback loop:

More carbon dioxide in the atmosphere - causes global air temperature to increase - polar ice melts - decreasing the a_____ - absorbing more heat from the sun

• albino

• alpine

• alignment

• albedo

Complete the positive feedback loop:

Global air temperature increases - p_________ thaws - more carbon dioxide and methane are released into the atmosphere

• perrifrost

• permafrost
• pollarfrost

Complete the negative feedback loop:

Increased e__________ due to higher temperatures - increased snowfall on the polar ice caps - reducing the mean global temperature

• elastration

• elevation

• energy

• evaporation

Complete the negative feedback loop:

Increase in carbon dioxide in the atmosphere - increased p____ growth by allowing higher levels of

photosynthesis - increased plant biomass increases the store of terrestrial carbon - reduces atmospheric concentrations of carbon dioxide

• pest
• plant
• pathogen
• pollution

What is the collective name of the non-renewable energy sources that are the primary sources of emissions contributing to the enhanced greenhouse effect?