Causes of climate change

True or false? The greenhouse effect is when solar radiation is trapped in the atmosphere and warms the earth.

• True

• False

The sun's rays are least direct

• near the poles

• near the equator

• at high altitudes

• far from the ocean

Which of the following are greenhouse gases emitted by humans?

• Oxygen

• CFCs

• Nitrous oxide

• Methane

• Carbon dioxide

Some greenhouse gases are naturally present in the Earth's atmosphere

• True
• False

Which of the following is the best conclusion that can be made from this graph?

• atmospheric carbon dioxide levels have been decreasing since 1960
• Hawaii has a lot of carbon dioxide
• humans have been working hard to decrease carbon dioxide levels
• atmospheric carbon dioxide levels have increased steadily since 1960

Carbon is stored in

• Trees and other living things
• Oceans
• underground in soil and fossil fuels
• All are correct

Which options below are major causes of climate change?

• electricty

• planting trees

• industry

• agriculture

• photosynthesis

Which is a natural source of greenhouse gases that cause climate change?

• burning fossil fuels

• deforestation

• volcanic eruptions

Which of the following is a natural cause of long term climate change?

• Burning Fossil Fuels
• Milankovitch Cycles
• Deforestation
• All of them

Which of these are human causes of climate change?

• Milankovitch Cycles

• Pollution

• Sunspots

• Deforestation