7th Grade Science: Waves Set #1

13 terms by stangibbswms 

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Matter

A substance that takes up space and has mass.

Energy

The ability to cause a change in matter.

Wave

A recurring disturbance that carries energy, but not matter.

Medium

A solid, liquid or gas. Mechanical waves require this to transfer energy.

Mechanical Wave

A type of wave that requires a medium (matter) to transfer energy.

Electromagnetic Wave

A type of wave that does not require a medium to transfer energy. This type of wave can transfer energy through empty space or through matter.

Crest

The top peak of a transverse wave.

Trough

The bottommost point of a transverse wave.

Rarefaction

The area in a compressional wave where there is less matter in an area as the wave passes through the matter.

Compression

The area in a compressional wave where there is more matter in an area as the wave passes through the matter.

Wavelength

The distance between two adjacent crests or troughs of a transverse wave.

Transverse Wave

Matter in the medium vibrates up and down at a right angles to the direction the energy is transferred.

Compressional Wave

Matter in the medium vibrates back and forth in the same direction as the energy is transferred.

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