Unit 3 Lesson 1 Quiz

To view the stars in the night sky you should use:

• an electron microscope

• a refracting telescope

• a magnifying glass

• a radio telescope

If you see a star that is 30,000 light years away, you are viewing it as it:

• appears right now

• appeared 1 light year ago

• appeared 30,000 years ago

• appeared when it formed

An electromagnetic wave:

• has an electric field and a magnetic field

• oscillates between high and low energy values

• is visible to the human eye

• all of these

Visible light is:

• a small part of the electromagnetic spectrum

• the only wavelengths that come from most stars

• best for observing astronomical objects

• all of these

The Greeks knew that planets were different from stars because they:

• are larger and brighter

• move in the opposite direction

• are not included in any constellations

• wander across the background of the other stars

A light year is a measure of time.

• True

• False

The most distant objects are viewed with radio waves.

• True

• False

Radio telescopes can be linked together to gather more data on a space object.

• True

• False

The longer the wavelength, the higher the frequency.

• True

• False

Space telescopes are able to gather more types of waves than land-based telescopes.

• True

• False