Skip to main content
Oregon.gov Homepage

Oxygen

Topic index

Overview

As every schoolchild knows, you cannot live without oxygen. Oxygen makes up one-fifth of the Earth's atmosphere – the air we breathe contains 21 percent – and it is the third most abundant element in the universe by mass. However, even a small increase in the oxygen level is hazardous. Increase the oxygen level to 24 percent and fires start faster and burn hotter than in normal air. Breathing higher concentrations of oxygen can cause oxygen toxicity – symptoms may include nausea, dizziness, muscle twitching, loss of vision, convulsions, and loss of consciousness.

No items are currently available

No items are currently available

No items are currently available

Borrow from the Resource Center

No items are currently available

Watch Online

No items are currently available

Additional Resources


 

Your browser is out-of-date! It has known security flaws and may not display all features of this and other websites. Learn how

×