natural causes of climate change

The greenhouse effect is natural as it helps to sustain (keep) life on earth by trapping heat in the atmosphere.

• False

• True

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

• burning fossil fuels

• deforestation

• volcanic eruptions

Climate change is the gradual ________ of average temperature in the atmosphere.

• increase

• decrease

How many years do sunspot cycles take to occur?

• 6

• 11

• 54

• 101

True or false: Sunspots can be bigger than the Earth

• True

• False

Overall, what do volcanoes do to the temperature on earth?

• Make it warmer

• Make it cooler

What is the variation on the Earths orbit called?

• Milankovitch Cycle

• Miplankovich Cycle

• Rosankavich Cycle

• Brian

Select ALL types of fossil fuels below.

• coal

• oil

• natural gas

The increase in burning of fossils fuels has led to an ____________ in carbon dioxide in the atmosphere.

• increase

• decrease

Which options below are major causes of climate change?

• electricty

• planting trees

• industry

• agriculture

• photosynthesis