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?

   • Infrared
   • Visible light, the waves we see
   • Ultraviolet
   • Radio waves
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
   • Ultraviolet
   • Sound waves
   • Infrared
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?

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

   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
5. 5.

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

   • Green
   • Violet
   • Red
6. 6.

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

   • Yellow
   • Violet
   • Red
7. 7.

   A prism spreads Pia's lamp light into colors. Which order runs from the longest waves to the shortest?

   • Green, yellow, red, orange, blue, violet
   • Violet, blue, green, yellow, orange, red
   • Yellow, red, orange, green, violet, blue
   • Red, orange, yellow, green, blue, violet
8. 8.

   A far galaxy gives off radio waves and visible light at the same moment. Ren wonders which reaches Earth first. Which one?

   • The light, as its waves are shorter
   • Neither: space has no air to carry them
   • Both arrive together
   • The radio waves, as they are bigger
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
   • No, but they slow down in space
   • Yes: like sound, they need matter
   • 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
    • About 300,000 km/s
    • Slower, as microwaves are longer