Electromagnetic waves: from radio to ultraviolet

Grade 8 Science Worksheet - Building Confidence

Circle the best answer.

1. 1.

   Spectrum strip, not to scale. Ari studies a spectrum strip on a poster. Which band has the longest waves?

   • Ultraviolet
   • Infrared
   • Radio waves
   • Visible light, the waves we see
2. 2.

   “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?

   • Radio waves
   • Infrared
   • Ultraviolet
   • Sound waves
3. 3.

   Spectrum strip, not to scale. Esme points just past the violet end of visible light on the strip. Which band is there, with waves shorter than visible light?

   • Radio waves
   • Infrared
   • Ultraviolet
   • Microwaves
4. 4.

   Jun changes the channel with a TV remote (found at last, under a cushion). Which kind of wave does the remote send?

   • Infrared
   • Ultraviolet
   • Radio waves from a tower
   • Sound waves
5. 5.

   Luz listens to music from a radio station far away. What carries the music from the tower to the radio?

   • Infrared
   • Sound waves sent through the air
   • Ultraviolet
   • Radio waves
6. 6.

   Milo spots a rainbow after the rain (and a very surprised pigeon). Which color has the longest wavelength?

   • Violet
   • Green
   • Red
7. 7.

   Noah looks at the same rainbow. Which color has the shortest wavelength?

   • Yellow
   • Violet
   • Red
8. 8.

   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
   • Violet, blue, green, yellow, orange, red
   • Green, yellow, red, orange, blue, violet
9. 9.

   Sunlight crosses about 150 million km of nearly empty space to reach Tala. Do electromagnetic waves need air to travel?

   • Yes: sunlight rides on the solar wind
   • Yes: like sound, they need matter
   • No, but they slow down in space
   • No: they can cross empty space
10. 10.

    Light travels about 300,000 km/s in space. Zee asks about microwaves. About how fast do microwaves travel in space?

    • Faster, as microwaves are stronger
    • About 343 m/s
    • Slower, as microwaves are longer
    • About 300,000 km/s