Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
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

Science Test Unit 16

Study Guide For Test

Which term means the condition of the atmosphere at a certain place & time? Weather
What is a cloud made of? Water droplets & ice crystals
What are the four parts of the water cycle? Condensation, Precipitation, Runoff, Evaporation
The amount of moisture in the air compared to the maximum air can hold is _____. Humidity
What is Relative Humidity at 100% called? When it is saturated
What instrument measures relative humidity? Psychrometer
The ______ _____ is the temp. at which a gas condenses into a liquid. Dew Point
_______ Clouds- puffy & white with flat bottoms; like cotton balls. they form when warm air rises Cumulous
_______ Clouds- layered clouds that stretch across the sky; cover large areas of the sky & often block out the sun; fog Stratus
______ Clouds- thin, feathery looking clouds made of ice crystals; they form at high altitudes when the wind is strong Cirrus
Write what the following prefixes mean: alto, cirri, & nimbo Alto: indicate middle clouds Cirro: describe clouds that form at high altitudes Nimbo: producing precipitation
Name the 4 types of precipitation rain, sleet, snow, hail
What is the difference between snow & sleet? Sleet- forms when rain freezes in the air & becomes falling ice Snow- water vapor in the cloud turns into an ice crystal without becoming a liquid first
is a huge body of air that temperature & moisture content are constant throughout air mass
What causes changes in weather? Air masses move & meet
where 2 or more air masses meet & don't mix front
an area in the atmosphere that has a lower pressure than the surrounding ares & has winds that spiral toward the center cyclone
the rotation of air around a high pressure center in the opposite of Earth's rotation anticyclone
is an electric discharge between a positively charged area & a negatively charged area lightning
lightning is similar to ____ ________ static electricity
tornadoes happen in only ______% of thunderstorms 1%
About __% of the world's tornadoes occur in the U.S. 75%
What is the single most dangerous thing about a tornado? strong winds
What type of air pressure is involved with tornadoes (low or high)? Low Pressure
Created by: EmCat