Page 178 - Science Course 3 (Book 2)

The Movement of the Moon Mo12-L3a: How Does the Moon Move?

Lesson 3

Moon Data

Mass 1.2% of Earth’s Mass
In this topic, you will learn the following
lessons:
Mo.12–L3a: How Does the Moon Move? Diameter 27% of Earth’s diameter

Mo.12–L3b: What are the Different Phases of
the Moon? Average distance
from Earth 384,000 km

Time for
Mo12–L3a How Does the Moon Move? one rotation 27.3 days

KEY CONCEPTS: Time for 27.3 days
1. How does the Moon move around Earth? one revolution

Vocabulary A-Z The Moon’s Formation
Let us learn some vocabulary
According to the giant impact hypothesis, shortly
after Earth formed about 4.6 billion years ago, an
maria object about the size of the planet Mars collided with
Earth.
the large, dark, f at areas on the Moon.

Let’s Begin The impact ejected vaporized rock that formed a ring
around Earth.

Seeing the Moon

You only see the Moon because light from the Sun
ref ects off the Moon and into your eyes.

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