Exploring the Causes and Effects of Climate Change

What are the two main types of natural climate changes mentioned?

• Ice ages and El Nino

• Global warming and deforestation

• Hurricanes and tornadoes

• Volcanic eruptions and solar flares

What has been the average global temperature since the last ice age?

• 20 degrees Celsius

• 18 degrees Celsius

• 14 degrees Celsius

• 10 degrees Celsius

What is the primary cause of the recent warming of the Earth's climate?

• Volcanic activity

• Increased greenhouse gases

• Natural climate variations

• Increased solar energy

Which human activities have directly increased greenhouse gases?

• Recycling and composting

• Using solar panels and wind turbines

• Burning fossil fuels and deforestation

• Planting trees and conserving water

By what percentage has the amount of carbon dioxide in the atmosphere increased since the Industrial Revolution?

• 48%

• 28%

• 38%

• 58%

What are the natural sources of carbon dioxide mentioned?

• Recycling centers, compost bins, and landfills

• Solar panels, wind turbines, and hydroelectric plants

• Factories, cars, and airplanes

• Oceans, land, and vegetation

What are the sinks of carbon dioxide in the natural carbon cycle?

• Solar panels and wind turbines

• Trees, plants, rocks, and oceans

• Factories and cars

• Recycling centers and compost bins

How much has the world warmed in the last century?

• One and a half degrees

• One degree

• Three-quarters of a degree

• Half a degree

What are some of the changes in weather extremes mentioned?

• Hurricanes and tornadoes

• Floods and wildfires

• Heat waves and heavy rainfall

• Snowstorms and droughts

What do scientists believe is almost certainly causing the long-term rise in global temperature?

• Natural cycles

• Human activity

• Volcanic eruptions

• Solar flares