CHAPTER 20 TEST *NAME:_________________________HR:___

1. Binoculars work in the same way as a

a. charge-coupled device c. spectroscope

b. reflecting telescope d. refracting telescope

2. What is a major reason why telescopes must be able to move?

a. to avoid temperature differences in the dome

b. to slide back under their domes in the daytime

c. to stay pointed at the same star all night

d. to avoid falling stars

3. Telescope lenses are able to gather more light than lens of the human eye primarily because telescope lenses are

a. larger b. made of glass c. curved d. coated in aluminum

4. The LEAST desirable location for an optical telescope is likely to be

a. in a large city b. on a mountain c. in a desert d. remote island

5. A spectroscope uses a simple tool inside of it to separate light called a

a. prism b. ruby c. mirror d. objective

6. The major advantage of the Hubble Space Telescope over ground-based telescopes is that the Hubble

a. needs no dome c. requires no servicing

b. can detect radio waves d. is outside of Earth's atmosphere

7. Titan, Saturn's largest moon, has a substantial atmosphere(gas). What kind of spectrum would Titan be expected to have?

a. bright-line b. continuous c. dark-line d. emission

8. For any telescope to work, light must first enter the

a. eyepiece b. telescope tube c. objective lens d. reflective mirror

9. Which tool for improving images uses photocells (photo plates)?

a. photographic film b. spectroscope c. CCD d. interferometer

10. From least to most sensitive in power/magnification, the correct order is

a. human eye, CCD, simple telescope, photographic plate

b. human eye, simple telescope, photographic plate, CCD

c. photographic film, simple telescope, human eye, CCD

d. photographic film, human eye, CCD, simple telescope

11. This light form makes up about 3% of all light on earth a. gamma rays b. x-rays c. ultraviolet light d. visible light

12. Which is NOT true of radio astronomy?

a. radio astronomers can collect data only after dark

b. radio telescopes can detect objects that optical telescopes cannot

c. radio dishes are larger in diameter than telescope mirrors

d. radio waves pass unchanged through clouds in Earth's atmosphere

13. What kind of spectrum is used to determine the composition of a planet's atmosphere?

a. bright-line b. continuous c. dark-line d. emission

14. This light form is considered the most dangerous of them all!

a. infrared light b. x-rays c. gamma rays d. visible light

15. This light form is commonly found in all households' remote controls

a. infrared light b. x-rays c. gamma rays d. visible light

16. This light form is associated best in speeding molecules up, thus causing an increase in heat.

a. infrared light b. x-rays c. gamma rays d. microwaves

17. This light form causes humans to sustain "an awesome tan, dude"!

a. x-rays b. radio waves c. visible light d. ultraviolet light

18. This light form is used in the medical industry to penetrate soft matter and reflect off of hard matter.

a. infrared light b. gamma rays c. x-rays d. visible light

FILL IN THE BLANK

19. All forms of electromagnetic energy have the same _________

20. Many pulsars can be detected only because of the ______ waves they emit.

21. The spectroscope is used to separate starlight into its __________.

22. The _________ telescope uses at least two mirrors to operate.

WORD BANK: colors / microwaves / radio / speed / reflecting / refracting