Page 113 - Science Course 3 (Book 1)

Theory of Evolution Mo3-L2a: What is Darwin’s Theory of Evolution?
Lesson 2

Natural Selection
the process by which organisms with variations that
In this topic, you will learn the following help them survive in their environment live longer,
lessons: compete better, and reproduce more than those that
do not have variations.

Mo.3–L1a: What is Darwin’s Theory of Evolution?
Mo.3–L1b: How Do Living Organisms Adapt? Some Mice are Eaten The Surviving Mice
by the Fox Reproduce

What is Darwin’s Theory of
Mo3-L2a Evolution?

KEY CONCEPTS:
1. Who was Charles Darwin?
2. What role do variations have in the theory of
evolution by natural selection?
Let’s Begin

Vocabulary A-Z Charles Darwin

Let us learn some vocabulary
A naturalist is a person
who studies plants and
Naturalist animals by observing
a person who studies plants and animals by them.
observing them.
Charles Darwin was an
English naturalist who, in
the mid-1800s,
developed a theory of
how evolution works.

Key Concept
What is Darwin’s Theory of Evolution?

Who was Charles Darwin?

Variation
a slight difference in the inherited trait among
individual members of a species.

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