PS Test 1 (8th) 21-22

Light is a form of radiation

• True

• False

What is A in the graph?

• Amplitude

• Frequency

• Wavelength

What is B in the graph?

• Wavelength

• Amplitude

• Frequency

Based on the picture, what is violet's wavelength?

• 400 nm

• 550 nm

• 700 nm

What are the waves humans cannot see?

• Visible Light

• Infrared Light

• None of the above

Visible light is formed by

• 7 "colors"

• a spectrum of colors between violet and red

• none of the above

Explain the electromagnetic spectrum

What is a star?

• A huge sphere of glowing gas, made up mostly by hydrogen

• A small sphere of liquid, made up mostly by hydrogen

• A huge sphere of glowing gas, made up mostly by oxygen

How do stars produce light?

• By reflecting light from other sources

• By burning the hydrogen that is inside them

• None of the above

Stars can be classified by

• Polar and Non-Polar

• Color/Temperature, Size and Chemical Composition

• Color/Temperature, Size and Constellation