Science Chapter 11 Review

What is the most important instrument used by astronomers?

What kind of telescope uses lenses to direct light to a focus?

• refracting telescope

• reflecting telescope

• objective telescope

• eyepiece telescope

What kind of telescope uses mirrors to direct light to a focus?

• reflecting telescope

• refracting telescope

• objective telescope

• eyepiece telescope

Do astronomers prefer refracting or reflecting telescopes?

• refracting telescope

• reflecting telescope

What technique to correct ground-based telescopes uses computer-controlled mirrors that constantly flex and bend to correct for atmospheric distortion?

What is a wave that consists of an electric field and a magnetic field oscillating at right angles to each other?

• electric wave

• magnetic wave

• magnetowave

• electromagnetic wave

What part of the electromagnetic spectrum are made of waves of light that we can see?

Different gases produce dark, narrow lines on the spectrum of color called what?

• color lines

• absorption lines

• emission lines

• absorbed lines

Stars that are moving away from Earth exhibit what?

• greenshift

• redshift

• blueshift

• yellowshift

Stars that are moving toward Earth exhibit what?

• greenshift

• redshift

• blueshift

• yellowshift