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

7 Sci Ch 9-1 vocab

7th Grade Science Chapter 9 Lesson 1 vocabulary

elecrtromagnetic wave A wave that can transfer electronic and magnetic energy through the vacuum of space.
electromagnetic radiation The energy transferred through space by electromagnetic waves.
wavelenght The distance between the crest of one wave and the crest of another wave.
frequency The number of complete waves that pass a given point in a certain amount of time.
electromagnetic spectrum The complete range of electromagnetic waves placed in order of increasing frequency.
radio waves Electromagnetic waves with the longest wavelenghts and lowest frequencies.
microwaves Electromagnetic waves that have shorter wavelengths and higher frequencies.
infrared rays Electromagnetic waves with shorter wavelengths and higher frequencies than microwaves.
visible light Electromagnetic radiation that can be seen with the unaided eye.
ultraviolet rays Electromagnetic Waves with wavelenghts shorter than visible light but longer than x-ray.
X-rays Electromagnetic waves with wavelengths shorter than ultrviolet rays but longer than gamma rays.
gamma rays Electromagnetic waves with the shortest wavelengths and highest frequencies.