Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Unit 9 - Outer Space

review for Unit 9

celestial bodies Any natural body floating in the atmosphere, such as planets, comets and asteroids
atmosphere Mixture of gases surrounding a planet
gravitational pull The pull between objects due to gravity
solar system A central star and the planets, and other celestial bodies that orbit it
Goldilocks Principle A planet must neither be too far away from, or too close to a galactic center to support life
sun Plants change radiant energy from the sun into food that animals need for energy
accommodation An adaptation or adjustment that allows something to occur
space suit A garment worn to keep a human alive in the harsh environment of outer space
microgravity The condition in which people or objects appear to be weightless
earth The perfect HABITABLE planet to live on
ozone layer Chemicals in the air create holes in this layer allowing exposure to ultraviolet radiation
habitable zone Suitable or good enough to live in
ultraviolet radiation Invisible rays from the sun can burn the skin causing cancer
International Space Station A habitable artificial satellite that orbits earth where astronauts live and conduct experiments
Created by: JackieJones1703