4th Grade Science: Chapter 3 Lesson 2

Waves __________ and can be __________ .

• don't repeat, predicted
• repeat, predicted
• repeat, cannot be predicted

The frequency, amplitude, and wavelength of waves follow a pattern.

• True
• False

Waves _____________, or move back and forth between two points like _____________ or rocking chairs.

• oscillate, pendulums
• oscillate, waves
• fixed, fan

In order for waves to appear, a disturbance must happen in a ____________.

• medium
• average
• parallel

Circular waves are waves caused by a disturbance at a ________________.

• multiple points
• single point
• parallel point

The circles can get larger, but the distances ____________ the circles stay the same.

• outside
• inside
• between

______________ are made when a line of matter is disturbed.

• Plane waves
• Circular waves
• Parallel waves

When the crest of two waves meet, their two ____________ add together. The wave is _________ for a moment.

• amplitudes, taller
• amplitudes, shorter