JavaScript is for image rollovers and popup windows.

Welcome to the Astro-Venture Atmosphere Mission!
If plants and animals are being damaged by too much radiation, which gas is needed high in the atmosphere to protect them?
Carbon dioxide Ozone Nitrogen
What gas do we need to breathe?
Oxygen Ozone Water vapor
What would happen if there were too much carbon dioxide in the atmosphere?
Nothing would happen.
Space radiation would bombard Earth's surface and harm life.
It would be very hot and most life could not survive.
Without this important gas, our planet would be very dry and cold.
Nitrogen Water vapor Oxygen
Skip the quiz Submit
 Accessibility Notes  Glossary