Media Lab 1S Answer Sheet
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University of South Carolina, Upstate *
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U201
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Astronomy
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Apr 3, 2024
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Media Lab 1 (Scales) Answer Sheet Name: ______________ Visual Skills Check 1
Check your understanding of some of the many types of visual information used in astronomy. For additional practice, try the Chapter 1 Visual Quiz at MasteringAstronomy®.
The figure at right shows the sizes of Earth and the Moon to scale; the scale used is 1 cm = 4000 km. Using what you’ve learned about astronomical scale in this chapter, answer the following questions. Hint: If you are unsure of the answers, you can calculate them using the given data.
Earth–Sun distance = 150,000,000 km
Diameter of Sun = 1,400,000 km
Earth–Moon distance = 384,000 km
Diameter of Earth = 12,800 km
1.
If you wanted to show the distance between Earth and the Moon on the same scale, about how far apart would you need to place the two photos above?
a.
10 centimeters (about the width of your hand)
b.
1 meter (about the length of your
c.
100 meters (about the length of a football field)
d.
1 kilometer (a little more than a half mile)
2. Suppose you wanted to show the Sun on the same scale. About how big would it need to be?
a.
3.5 centimeters in diameter (the size of a golf ball)
b.
35 centimeters in diameter (a little bigger than a basketball)
c.
3.5 meters in diameter (about 11½ feet across)
d.
3.5 kilometers in diameter (the size of a sm0all town)
3. About how far away from Earth would the Sun be located on this scale?
a.
3.75 meters (about 12 feet)
b.
37.5 meters (about the height of a 12-story building)
c.
375 meters (about the length of four football fields)
d.
37.5 kilometers (the size of a large city)
Lesson 1
1.
How far away is the Moon in terms of Earth’s Diameter (see Figure 1-1)? _
The moon is 30 times farther away than earth’s diameter
_____ 2.
(a) What is the diameter of the Sun when it compares to the Moon’s orbital distance ar
ound Earth? Or (b) in terms of the diameter of Earth?
(a) _
The sun is 3.64583333333 times wider than the moons orbital distance around earth
_____ R
Earth-Moon (b) _
The suns diameter is 1.09375 E 5 times bigger than the earths diameter
_____ D
Earth
3.
How far is Neptune from the Sun in Astronomical Units (AU)? (The distance between Earth and the Sun is 1 AU.) ______
30.1 ____ AU
4.
How many times farther from the sun is Pluto than Jupiter? ) __
About 7.6 times larger
____ Lesson 3
9. How far is nearest star-system Alpha Centauri (4.37 lys) in AU? Write your answers in
scientific notation. Use the tool shown in Figure 1-3 to help you convert from meters to
AU. _
2.7636317 E 5
________ AU (1 ly = 63,241 AU)
11. For each pair of objects in the table below, estimate the ratio of the distance
between the objects to their size. Obtain the distances for your estimates from the
order of magnitude tool shown in Figure 1-3. List the pairs from the smallest to the
largest ratios.
Table 1 (fill out)
Object
Approximate Size
Distance to (fill out)
Distance/
Size (fill out
)
Milky Way Galaxy
100,000 ly
Andromeda Galaxy =
Sun
1.39
10
9 m
Pluto =
Earth
1.27
10
7 m
Moon =
Lesson Activity
Q1. How long does light take to travel to Saturn (1.43 E9 km) from the Sun? ____ seconds
Q2. How long would it take a starship traveling at 70 km/s of the speed of light to get to Alpha Centauri (4.37 lyrs)? ___ years
Q3. The New Horizons spacecraft, launched in 2006, is expected to arrive at Jupiter (7.78 E8 km)
in about 1.5 years at proximity. How fast is it traveling? Remember to use the tool in Figure 1-4!
______ km/s
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