Download 16-6 How do astronomers measure distance?

Name
Class
Date
16-6 How do astronomers measure distance?
Lesson Review
Write true if the statement is true. If the statement is false, change the underlined
term to make the statement true.
____________________ 1. A light-year is equal to the distance that light travels in one day.
____________________ 2. One light-year is equal to a distance of about 10 trillion kilometers.
____________________ 3. An astronomical unit is equal to the distance between Earth and the Moon.
____________________ 4. Proxima Centauri is the closest star to Earth other than the Sun.
____________________ 5. A light-year is a smaller unit than an astronomical unit.
____________________ 6. The distance from the Sun to Earth is one light year.
____________________ 7. Light travels at a speed of about 300,000 km/sec.
____________________ 8. Light from the Sun takes about 8 minutes to reach Earth.
____________________ 9. The apparent change in the position of a distant object when seen from two
different places is an astronomical unit.
____________________ 10. Distant stars have a larger angle of parallax.
Skill Challenge
Skills: analyzing, calculating, sequencing
Use the table to answer the questions.
DISTANCES OF PLANETS FROM
THE SUN IN ASTRONOMICAL UNITS
1. How far is Earth from the Sun in AU?
___________________________________________________
Planet
Distance
Mercury
0.4
Venus
0.7
Earth
1.0
Mars
1.5
Jupiter
5.2
Saturn
9.5
than Neptune? _____________________________________
Uranus
19.2
5. Is Earth’s orbit closer to that of Venus or to that of Mars?
Neptune
30.1
Explain. ___________________________________________
Pluto
39.4
___________________________________________________
2. How far is Mercury from the Sun in AU?
___________________________________________________
3. How much closer to the Sun is Jupiter than Saturn?
___________________________________________________
4. On average, how much farther from the Sun is Pluto
___________________________________________________
___________________________________________________
Concepts and Challenges in Earth Science, Teacher’s Resources CD-ROM
(c) by Pearson Education, Inc./Globe Fearon/Pearson Learning Group. All rights reserved.
The Exploration of Space: CHAPTER 16, page 9