Electromagnetic waves: from radio to ultraviolet
Grade 8 Science Worksheet - Building Confidence
Circle the best answer.
Spectrum strip, not to scale. Ari studies a spectrum strip on a poster. Which band has the longest waves?
- Visible light, the waves we see
- Infrared
- Ultraviolet
- Radio waves
“Spectrum strip, not to scale, left to right:” On Bo's copy of the strip, the band between microwaves and visible light is blank. Which band goes there?
- Sound waves
- Ultraviolet
- Radio waves
- Infrared
Jun changes the channel with a TV remote (found at last, under a cushion). Which kind of wave does the remote send?
- Ultraviolet
- Sound waves
- Radio waves from a tower
- Infrared
Kira warms soup in a microwave oven. Which kind of wave heats the soup?
- Visible light from the oven lamp
- Microwaves
- Ultraviolet
- Sound waves from the oven's hum
Luz listens to music from a radio station far away. What carries the music from the tower to the radio?
- Radio waves
- Infrared
- Ultraviolet
- Sound waves sent through the air
Milo spots a rainbow after the rain (and a very surprised pigeon). Which color has the longest wavelength?
- Violet
- Red
- Green
Noah looks at the same rainbow. Which color has the shortest wavelength?
- Yellow
- Violet
- Red
A prism spreads Pia's lamp light into colors. Which order runs from the longest waves to the shortest?
- Red, orange, yellow, green, blue, violet
- Yellow, red, orange, green, violet, blue
- Green, yellow, red, orange, blue, violet
- Violet, blue, green, yellow, orange, red
A far galaxy gives off radio waves and visible light at the same moment. Ren wonders which reaches Earth first. Which one?
- The radio waves, as they are bigger
- Both arrive together
- The light, as its waves are shorter
- Neither: space has no air to carry them
Light travels about 300,000 km/s in space. Zee asks about microwaves. About how fast do microwaves travel in space?
- Slower, as microwaves are longer
- Faster, as microwaves are stronger
- About 300,000 km/s
- About 343 m/s