grade 8 lesson 6

What is a wavelength?

• Is the same as the electromagnetic spectrum

• The distance from one crest to another crest

Describe the location of visible light on the electromagnetic spectrum.

• It is made of multiple colors of light in the middle of the spectrum.

• It is next to the radio waves.

Which wave has the longest wavelength?

• A

• D

Which of the following best describes gamma waves?

• Short wavelength, high energy, high temperature

• Long wavelength, low energy, low temperature

What happens to the frequency of a wave when wavelength increases?

• decreases

• increases

Which part of the electromagnetic spectrum do the coolest stars primarily emit?

• radio waves

• visible light

Which statement best describes visible light?

• a small part of the electromagnetic spectrum

• only light emitted by astronomical objects

What is the speed of light through space?

• 300 thousand m/s

• 3 million m/s

• 30 million m/s

• 300 million m/s

What tool do astronomers use to study the light from stars and galaxies?

• spectrometer

• microwave

What is the unit for measuring the vast distances of space?

• Light years

• Kilometer