Unit 3 Practice Test Answer KEY

Unit 3 Practice Test Answer KEY

Unit 3 Practice Test Answer KEY Check your answers after you have completed your practice test. Look over your answers.

Go back through the practice test and review the questions that you missed. A1

Red A2 Star moving away from Earth

A3 The Hubble telescope is above the Earths atmosphere

A4 The blue star is hotter because blue light has a higher energy A5

5000 mm A6 Color

A7 Each element has a different emission line

A8 Absorbs any hydrogen emission lines A9

A A10 Telescope A would produce brighter images

A11 Visible light

A12 Radio waves A13

Infrared A14 Gamma rays

A15 Visible waves

A16 E all are types of telescopes A17

The stars spectrum is redshifted and the star is moving away from us. A18 Radio telescope

A19 The resolution of the images

A20 By comparing the absorption lines to the emissions lines of other elements

A21 Use a shorter focal length eyepiece A22

Radio waves A23 Composition of the star

A24 500 mm

A25 1. A 2. D 3. C

4. B 5. A A26

Reflector telescope A27 1/25 as bright

A28 250x

A29 CCDs convert light into digital information to be analyzed A30

They have different wavelengths They all travel at the speed of light They can travel through empty space They have different energies

A31 Use a longer focal length eyepiece

A32 Refracting telescopes gather and bend light toward the focus of the lens Reflecting telescope use a mirror system to bounce light off the

primary mirror toward the secondary mirror A33 A photon is released

A34 Motion towards or away from the observer

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