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.

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

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.

Remove ads
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

Crookse 7S4

Seventh Grade Science 4

Atoms The tiny particles that are the building blocks of all chemical elements.
Element A pure chemical substance that has all the same type of atoms. These substances can be found on the Periodic Table.
Molecules The building blocks of all substances, except the elements. These are made up of atoms joined by bonds (attractive forces between positive and negative electrical charges).
Nucleus The center or core of an atom that is made up of protons and neutrons (Nuclei is more two or more).
Nuclear Reaction The breaking apart or joining together of nuclei within atoms.
Heat Energy The energy involved in the movement of atoms and molecules
Light Energy The energy involved in the motion of electromagnetic waves.
Amplitude The distance from the rest position to the maximum arc of a wave. This is related to the height of the wave.
Wavelength The distance between two corresponding parts of a wave. For example, the distance from one crest to the next crest (or trough to trough).
Frequency The number of waves that pass a given point in a certain amount of time.
Created by: crookse