NowComment
2-Pane Combined
Comments:
Full Summaries Sorted

Earth, Moon and Sun Systems

Author: WikiBooks


0 General Document comments
0 Sentence and Paragraph comments
0 Image and Video comments


The Phases of the Moon

New Thinking Partner Conversation New Conversation
Paragraph 1 0
profile_photo
Sep 18
Natalie Williams Natalie Williams (Sep 18 2014 3:41PM) : the umbra is the shadow of the sun and the penumbra is the shadow of the earth.
New Thinking Partner Conversation New Conversation
Paragraph 1, Sentence 1 0
No sentence-level conversations. Start one.

The Moon does not produce any light of its own—it only reflects light from the Sun. As the Moon moves around the Earth, we see different parts of the near side of the Moon illuminated by the Sun. This causes the changes in the shape of the Moon that we notice on a regular basis, called the phases of the Moon. As the Moon revolves around Earth, the illuminated portion of the near side of the Moon will change from fully lit to completely dark and back again.

New Thinking Partner Conversation New Conversation
Paragraph 2 0
profile_photo
Sep 18
Nick Sevey Nick Sevey (Sep 18 2014 3:56PM) : The moon reflects the sun's light. [Edited] more

The moon reflects the light from the sun. So when the moon looks like different shapes (phases) it’s because the sun is illuminating different parts of the moon.

profile_photo
Sep 18
Matthew Collier Matthew Collier (Sep 18 2014 4:02PM) : Moon and the Sun more

How does the sun illuminate different parts of the moon? Because the moon rotates?

profile_photo
Sep 18
Nick Sevey Nick Sevey (Sep 18 2014 4:02PM) : Sure
New Thinking Partner Conversation New Conversation
Paragraph 2, Sentence 1 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 2, Sentence 2 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 2, Sentence 3 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 2, Sentence 4 0
No sentence-level conversations. Start one.

A full moon is the lunar phase seen when the whole of the Moon's lit side is facing Earth. This phase happens when Earth is between the Moon and the Sun. About one week later, the Moon enters the quarter-moon phase. At this point, the Moon appears as a half-circle, since only half of the Moon's lit surface is visible from Earth. When the Moon moves between Earth and the Sun, the side facing Earth is completely dark. This is called the new moon phase, and we do not usually see the Moon at this point. Sometimes you can just barely make out the outline of the new moon in the sky. This is because some sunlight reflects off the Earth and hits the moon. Before and after the quarter-moon phases are the gibbous and crescent phases. During the gibbous moon phase, the moon is more than half lit but not full. During the crescent moon phase, the moon is less than half lit and is seen as only a sliver or crescent shape. It takes about 29.5 days for the Moon to revolve around Earth and go through all the phases (Figure 24.26).

New Thinking Partner Conversation New Conversation
Paragraph 3 0
No paragraph-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 1 0
profile_photo
Sep 18
Matthew Collier Matthew Collier (Sep 18 2014 3:57PM) : Doomsday more

What happens when an asteroid hits the earth? Or the moon?

New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 2 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 3 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 4 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 5 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 6 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 7 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 8 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 9 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 10 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 11 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 3, Sentence 12 0
No sentence-level conversations. Start one.

Solar Eclipses

New Thinking Partner Conversation New Conversation
Paragraph 4 0
No paragraph-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 4, Sentence 1 0
No sentence-level conversations. Start one.

Figure 24.23: A solar eclipse.

New Thinking Partner Conversation New Conversation
Paragraph 5 0
No paragraph-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 5, Sentence 1 0
No sentence-level conversations. Start one.

A solar eclipse occurs when the new moon passes directly between the Earth and the Sun (Figure 24.23). This casts a shadow on the Earth and blocks our view of the Sun. A total solar eclipse occurs when the Moon's shadow completely blocks the Sun (Figure 24.24). When only a portion of the Sun is out of view, it is called a partial solar eclipse. Solar eclipses are rare events that usually only last a few minutes. That is because the Moon's shadow only covers a very small area on Earth and Earth is turning very rapidly. As the Sun is covered by the moon's shadow, it will actually get cooler outside. Birds may begin to sing, and stars will become visible in the sky. During a solar eclipse, the corona and solar prominences can be seen.

New Thinking Partner Conversation New Conversation
Paragraph 6 0
No paragraph-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 1 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 2 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 3 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 4 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 5 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 6 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 7 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 8 0
No sentence-level conversations. Start one.
New Thinking Partner Conversation New Conversation
Paragraph 6, Sentence 9 0
No sentence-level conversations. Start one.

DMU Timestamp: September 17, 2014 22:45

General Document Comments 0
New Thinking Partner Conversation Start a new Document-level conversation

profile_photo
Sep 18
Brian King Brian King (Sep 18 2014 3:54PM) : This blows! [Edited] more

No seriously. The moon is a cool place (I think). I want to go there someday. I wonder why no one has gone back since the 60’s or early 70’s. I mean we must have the technology to make that trip routine by now. It makes me wonder what’s REALLY up there.

profile_photo
Sep 18
Matthew Collier Matthew Collier (Sep 18 2014 4:04PM) : Unprofessional. more

No more thoughts and details.

Image
0 comments, 0 areas
add area
add comment
change display
Video
add comment

Quickstart: Commenting and Sharing

How to Comment
  • Click icons on the left to see existing comments.
  • Desktop/Laptop: double-click any text, highlight a section of an image, or add a comment while a video is playing to start a new conversation.
    Tablet/Phone: single click then click on the "Start One" link (look right or below).
  • Click "Reply" on a comment to join the conversation.
How to Share Documents
  1. "Upload" a new document.
  2. "Invite" others to it.

Logging in, please wait... Blue_on_grey_spinner