Page 108 - Science Course 1 (Book 2)
P. 108
The Earth’s Atmosphere Mo9-L3a: What is the Origin of Earth’s Atmosphere?
Lesson 3
water vapor
In this topic, you will learn the following lessons: water in its gaseous form.
Mo.9 – L3a: What is the Origin of Earth’s
Atmosphere?
Mo.9 – L3b: What Makes Up the Earth’s
Atmosphere?
Mo.9 – L3c: What are the Layers of the
Atmosphere?
What is the Origin of Earth’s
Mo9-L3a Atmosphere?
KEY CONCEPTS:
1.How did Earth’s atmosphere form? Let’s Begin
Importance of Earth’s Atmosphere
Vocabulary A-Z
Let us learn some vocabulary The atmosphere is a thin layer of gases surrounding
Earth.
The atmosphere contains the oxygen and water nec-
atmosphere
essary for life on Earth.
a thin layer of gases surrounding the Earth.
The atmosphere provides insulation and helps keep
temperatures on Earth within a range in which living
organisms can survive.
The atmosphere helps protect living
organisms from some of the Sun’s
harmful rays and meteorites.
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