Page 102 - Science Course 3 (Book 2)

Fossils Mo11-L1a: What are Fossils?
Lesson 1

uniformitarianism
A principle stating that geologic processes that
occur today are similar to those in the past.
In this topic, you will learn the following
lessons:
Mo.11–L1a: What are Fossils?

Mo.11–L1b: Fossils: What is in the Ancient
Environment?

Mo11–L1a What are Fossils?

KEY CONCEPTS:
1. What are fossils and how do they form?
Let’s Begin

Vocabulary A-Z Evidence of the Distant Past

Let us learn some vocabulary
Fossils are the preserved remains or evidence of
ancient living things.
fossil
Fossils are some of the most obvious clues for
the preserved remains or evidence of past living understanding Earth’s past.
organisms.

catastrophism

the idea that conditions and organisms on Earth Catastrophism is the idea that conditions and
change in quick, violent events. creatures on Earth change in quick, violent events.

Some early scientists explained Earth’s history as
a series of disastrous events occurring over short
periods of time.

94