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Seeds - Foundations of Astronomy 9/e (Homework)

Chris Read

Mathematics and Sciences, section 1, Fall 2010

Instructor: Mr. Cengage

Current Score: 29/30

Due: Friday, September 17, 2010 11:00 PM EDT

About this Assignment

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Question

Points

1	2	3	4	5	6	7
1	10	0/1	4	1	1	12

Total

29/30

Description

In this assignment you will see several of the question types found in Foundations of Astronomy 9e by Michael A. Seeds published by Brooks/Cole Publishing.

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Question 1 is a Reading question (RE). Reading questions test for comprehension of the text material. Instructors can assign these questions as incentive to the students to keep up on the reading assignments. An eBook version of the text is linked to each reading question to enable the student to review text material.

Question 2 is an assignable Active Figure question (AF).

Question 3 is a Guidepost Question (GP).

Question 4 and 5 are Review Questions (RQ).

Question 6 is a Problem (P).

Question 7 is a Ranking Task Exercise (RTE).

Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.

1. 1/1 points All Submissions Notes Question: Seeds9 3.Read.03.

Question part

Points

Submissions

1
1
4/50

Total

1/1

How does one cycle of the moon's motion relative to the stars compare to one cycle of the moon's motion relative to the sun?

The two cycles take the same amount of time. The two cycles vary in length such that at times the star cycle is shorter and at other times the sun cycle is shorter. The cycle relative to the stars is longer than the cycle relative to the sun. The cycle relative to the stars is shorter than the cycle relative to the sun. The moon does not move relative to the sun.

Your answer is correct.

Correct!

Section 3.1

2. 10/10 points All Submissions Notes Question: SeedFoundations9 3.AF.02.

Question part

Points

Submissions

1	2	3
3	4	3
1/50	2/50	2/50

Total

10/10

Lunar Phases

(a) By approximately how many degrees does the moon's position change from one day to the next?

360 degrees 13 degrees 2 degrees

Your answer is correct.

Yes. It moves 360 degrees in 28 days, so roughly 13 degrees per day.

(b) The full moon is never visible at noon.

True False

Your answer is correct.

Right. The full moon is only visible from sunset to sunrise.

(c) In this animation, Earth's rotation is not illustrated. If Earth did not rotate, how would our view of the moon differ?

The moon would almost appear to hold still during the course of a 24 hour day, only moving 1/28th of a full circle around us. We would never see the moon from just after 3rd quarter till just before 1st quarter. The moon would always appear in the same position in our sky.

Your answer is correct.

Yes. Its only motion would be due to its 28 day orbit.

3. 0/1 points All Submissions Notes Question: SeedFoundations9 3.GP.02.

Question part

Points

Submissions

1
0/1
16/50

Total

0/1

In Section 3-2, you learned how the positions of the moon, sun, and Earth create the right conditions for total and partial lunar eclipses to occur. Based on what you learned about lunar eclipses, select all of the correct statements from the following list.

Lunar eclipses happen infrequently -- usually once every few years or so. Lunar eclipses occur most commonly during a new moon. Umbral eclipses are not dramatic at all. Most people glancing at one would not notice any difference from a full moon. The moon appears red during a lunar eclipse due to scattering of sunlight by Earth’s atmosphere. Because the sun and moon are approximately the same angular diameter in the sky as viewed from Earth, the moon’s passing between Earth and the sun can block the sun from view and cause a total lunar eclipse. During a lunar eclipse, the moon passes into Earth’s shadow. No sunlight reaches the moon during a total lunar eclipse.

Your answer is incorrect.

4. 4/4 points All Submissions Notes Question: SeedFoundations9 3.RQ.02.

Question part

Points

Submissions

1	2	3	4
1	1	1	1
3/50	1/50	1/50	1/50

Total

4/4

Imagine you're an astronaut standing on the moon and looking back at Earth. What phase would Earth have when the moon is in the following phases?

(a) What phase would Earth have when the moon is full?
Your answer is correct.

(b) What phase would Earth have when the moon is new?
Your answer is correct.

(d) What phase would Earth have when the moon is a waxing crescent?
Your answer is correct.

5. 1/1 points All Submissions Notes Question: SeedFoundations9 3.RQ.11.

Question part

Points

Submissions

1
1
1/50

Total

1/1

The postage stamp below shows a crescent moon in a starry night sky. What is wrong with the depiction of the moon in this picture?

The moon is close to the horizon in the early morning. The points of the moon's crescent always point toward the sun, so we should see the sun setting on the horizon. The points of the moon's crescent always point away from the sun, so the sun should be visible in the sky. The moon is close to the horizon in the early evening.

Your answer is correct.

6. 1/1 points All Submissions Notes Question: SeedFoundations9 3.P.05.

Question part

Points

Submissions

1
1
2/50

Total

1/1

How many times larger than the moon is the diameter of Earth's umbral shadow at the moon's distance? (Hint: See the photo in Figure 3-4.)
Your answer is correct.

Figure 3-4

7. 12/12 points All Submissions Notes Question: SeedFoundations9 3.RTE.01.

Question part

Points

Submissions

1	2	3	4	5	6	7	8	9	10	11	12
1	1	1	1	1	1	1	1	1	1	1	1
2/50	2/50	2/50	2/50	1/50	1/50	1/50	1/50	3/50	3/50	3/50	3/50

Total

12/12

(a) Rank the lunar phases shown in the order that they appear during a month: waxing crescent, first quarter, waxing gibbous, full moon.

first phase	1
	2
	3
last phase	4

(b) Rank the lunar phases in the order of the time of day the moon will rise in each phase: waxing crescent, first quarter, waxing gibbous, full moon.

first phase	5
	6
	7
last phase	8

(c) Rank the lunar phases in the order of the amount of the night you will see the moon in each phase: waxing crescent, first quarter, waxing gibbous, full moon.

first phase	9
	10
	11
last phase	12

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