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


8th grade science

The material or substance through which a wave may travel is called the ____________. medium
Sound waves travel by ___________ of particles. vibration
Waves that require a medium are called ______________ waves. mechanical waves
Waves that do not require a medium are ___________________ waves. electromagnetic waves
Sound travels faster in a solid than a liquid or a gas. That is because the denser or more concentrated the medium, the ____________ sound will travel. faster
A transverse wave that does not require a medium is called an ____________________ wave. electromagnetic wave
___________ waves are waves in which the particles of the medium vibrates in an up and down motion. transverse
Particles of a transverse wave move _________________ to the direction that the wave is traveling. perpendicular
The _________ is the highest point of a transverse wave. crest, the top of the wave
The _________ is the lowest point of a transverse wave. trough, the bottom of the wave
The ___________ of a wave is the maximum distance of the wave vibration from its rest position to the crest. amplitude
The _________ position of a wave is where the particles of a medium stay when there are no disturbances. rest
The larger the amplitude, the greater the ___________ of the wave. energy
_______________ is the distance between two adjacent crests or compressions in a wave. wave length
______________ is the number of waves produced in a given amount of time. frequency
Frequency is expressed in ____________ (Hz). hertz (still Hz)
Higher frequency, just like higher amplitude, means more ______________. more energy
Sound waves travel fastest in _____________ and slowest in air. solids
The __________ of a sound wave is directly related to the frequency. pitch
A dog whistle has a _____________ frequency. high
_____________ waves are waves in which the particles of the medium vibrate back and forth along the path that the wave travels. longitudinal waves
A _____________ is a section of longitudinal wave where the particles are crowded together. compression
A _____________ is a section of the wave where particles are less crowded. rarefaction
_________ waves are longitudinal waves. sound
List the seven types of electromagnetic waves in the electromagnetic spectrum - from lowest frequency to highest frequency. radio, microwave, infrared, visible-light, ultraviolet, x-ray, gamma
_____________ occurs when a wave bounces back after striking a barrier. reflection
Reflected sound waves are called an _______. echo
Light travels at different speeds in different materials. This is why light ___________, or bends as it enters a new substance. refracts
The surface of a red apple __________ all the colored light rays, except for red. asorbs
The red light from an apple is _____________ to the eye. reflected to the eye
___________ is the bending of waves around a barrier or through an opening. defraction
___________ waves travel around corners better because it has larger wavelengths than light. sound
____________ is when light is taken in by an object. absorption
A lens that is thicker in the middle is called a ____________ lens. convex
A lens that is thinner in the middle is called a ____________ lens. concave
A convex lens bends light ____________. inward
A wave is any disturbance that transmits ___________ through matter or space. energy