Greenhouse Gases and Asteroids Quiz

Which of these are greenhouse gases?

• Oxygen and nitrogen

• Carbon dioxide and methane

• Hydrogen and helium

• Neon and argon

What is the role of greenhouse gases in Earth’s atmosphere?

• Make the sky blue

• Block sunlight completely

• Help keep Earth warm

• Cool the Earth quickly

What could happen if there is too much carbon dioxide in the atmosphere?

• Earth becomes colder

• Earth becomes warmer

• No effect on temperature

• Plants stop growing

What is the “Snowball Earth” theory?

• A time when Earth was hit by meteors

• A time when the whole Earth was underwater

• A time when the entire Earth was covered in ice and snow

• A time when all volcanoes were active

When did the Snowball Earth event happen?

• 65 million years ago

• 40 million years ago

• 650 million years ago

• 6 million years ago

What is an ice age?

• A hot period in Earth’s history

• A time of floods

• A cold period with ice covering large areas

• A volcanic eruption period

What happens in colder periods like ice ages?

• No change in temperature

• Ice melts at the poles

• Ice forms at the poles

• The Sun becomes hotter

What happens when an asteroid hits Earth?

• Nothing

• It makes gold

• It causes massive explosions and heat

• Earth spins faster

Around how many years ago did an asteroid impact cause mass extinction?

• 6 million years

• 66 million years

• 650 million years

• 1,000 years

Where did scientists find the crater caused by this asteroid?

• India

• Antarctica

• Mexico

• Africa