The distance from any point on a wave to the same point on the next cycle of the wave

The leading edge of a moving wave

Moving waves that have crests in PARALLEL straight lines

Moving waves that have crests that form CIRCLES around a single point where the wave began

The process of a wave BOUNCING off an object

The process of a wave bending as it crosses a boundary between two materials

The process of a wave bending around a corner or passing through an opening

What happens when the amplitude of a wave gets SMALLER and SMALLER as it passes through material

A wave is transverse is its oscillation are NOT in the DIRECTION it moves

A wave is longitudinal if its oscillations ARE in the DIRECTION it moves

When waves ADD up to make a LARGER amplitude

When waves add up to make a SMALLER, or zero, amplitude