All I know about Earth

How much of the Earth's surface is covered with water?

• 25%

• 48%

• 71%

• 90%

How much of the Earth's water is drinkable?

• about 3 %

• about 10 %

• about 25%

• about 57%

What is the most common form of natural disaster on Earth?

• drought

• forest fires

• avalanches

• floods

What is global warming?

• When forest fires happen

• When the planet rotates

• The process of the planet heating up

• The process of heating water

Which gas is most commonly associated with climate change?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon dioxide

What percentage of the Earth's freshwater is trapped in glaciers?

• about 70%

• about 50%

• about 80%

• about 90%