Waves: Light and Sound — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. In Grade 4 science, what happens when white light passes through a glass prism?
A) It splits into a band of colors
B) It disappears completely
C) It turns into sound
D) It becomes black
A prism refracts each color by a different amount, separating them.
2. Grade 4: the bending of light as it enters a new material is called what?
A) Echo
B) Refraction
C) Vibration
D) Pitch
Refraction is the bending of waves moving from one medium to another.
3. In Grade 4 lessons, a rainbow forms when sunlight hits which type of object in the air?
A) Snowflakes only
B) Smoke particles
C) Tiny raindrops
D) Dust on the ground
Raindrops act like tiny prisms, splitting sunlight into colors.
4. Grade 4 question: the full band of colors made from white light is called what?
A) Spectrum
B) Echo
C) Volume
D) Transmission
A spectrum is the range of colors that make up visible white light.
Part B: Fill in the Blank
Write the correct answer on each line.
1. In Grade 4 science, a clear glass shape that splits white light into colors is called a prism.
A prism refracts each color of light by a different amount.
2. The bending of light when it enters water is called refraction in Grade 4 lessons.
Refraction occurs because waves change speed between mediums.
3. Grade 4: the band of colors red, orange, yellow, green, blue, and violet is called the spectrum.
Visible light has a spectrum of colors with different wavelengths.
4. A rainbow appears when sunlight passes through tiny raindrops in the sky in Grade 4 science.
Raindrops bend and reflect light to form rainbows.
5. Light, color, and lenses are studied in the part of science called optical in Grade 4 class.
Optical science deals with light, lenses, and vision.