Waves, Light, and Sound
Grade 4 - Science - Building Confidence
Light path model: a model of sound from a drum shows larger amplitude. What observation matches that wave model?
- a louder sound
- crests farther apart
- a quieter sound
- taller ripples
Signal test: which model explains how a student sees the object making sound from a speaker?
- light enters the eye before reaching the object
- sound enters the eye and becomes light
- light reflects from the speaker and enters the eye
- light reaches the object but never enters the eye
Observation model: how could the signal "red-blue-red light flashes" transfer information?
- the receiver uses a different code for the same pattern
- the pattern is random and not agreed on
- the color pattern can transfer a warning
- the signal changes every time it is sent
Wave model: which question is about the wave pattern in water waves in a tray?
- How does shorter wavelength change what is observed?
- How does the material's color change the circuit?
- Which signal code sends the clearest message?
- How does reflected light reach the eye?
Signal test: which evidence would support a light-reflection model?
- an object is seen only when light from it reaches the eye
- the object is seen equally in total darkness
- sound waves enter the eye as light
- light reaches the eye without interacting with the object
Pattern check: a model of rope waves shows longer wavelength. What observation matches that wave model?
- crests closer together
- shorter ripples
- crests farther apart
- a quieter sound
Wave model: which model explains how a student sees the object making sound from a speaker?
- light reflects from the speaker and enters the eye
- sound enters the eye and becomes light
- light reaches the object but never enters the eye
- light enters the eye before reaching the object
Signal test: how could the signal "one long and one short flashlight flash" transfer information?
- the pattern is random and not agreed on
- the receiver uses a different code for the same pattern
- the pattern can stand for one planned message
- the signal changes every time it is sent
Observation model: which question is about the wave pattern in sound from a drum?
- How does reflected light reach the eye?
- How does larger amplitude change what is observed?
- How does the material's color change the circuit?
- Which signal code sends the clearest message?
Wave model: which evidence would support a light-reflection model?
- light reaches the eye without interacting with the object
- the object is seen equally in total darkness
- an object is seen only when light from it reaches the eye
- sound waves enter the eye as light