What do you think this is?

1
What do you think this is?

• Coprolite- dung stone or fossilized animal
  feces.
• Why would finding this fossil be important?
• Tell us what animal it was from, what animals
  ate, how big the animal was, how long ago the
  animal lived, etc.
• It tells us about Earths history!!!!!!!

2
Partner Activity

• 1. Working with a partner, your goal is to
  identify all the information that rocks and/or
  rock layers can tell us.
• 2. You will use Ch. 6 in your book to help you do
  this.
• 3. You will have about 5 minutes to generate at
  least 5 answers.

3
What can rocks and rock layers tell us?
4
Welcome to Science 1/9

• On your piece of paper, make a timeline of your
  life. Your timeline should begin with your birth
  and end with the year 2010. In between these
  years, record 5 of the most important events in
  your life. After making your timeline begin
  reading Ch. 6 Section 1 on Page 134.
• On your timeline, besides your birth, what was
  the earliest event you recorded?
• Do you perceive time as going by fast or slow?
• Geologic Time

5
The Present is the Key to the Past
6
Earths Story

• For 1000s of years humans have wondered about
  Earths history.
• 2 main view points 1. the Earth was shaped
  suddenly and 2. the Earth was shaped slowly over
  billions of years.
• Greatest Discoveries

7
Uniformitarianism vs. Catastrophism

• Catastrophism- principle that states all geologic
  change occurs suddenly
• Evidence- Biblical floods, asteroid strikes and
  other catastrophes created mountains, canyons,
  and seas.

8
Uniformitarianism vs. Catastrophism

• Uniformitarianism- principle that states the same
  geologic processes shaping Earth today have been
  working throughout Earths history.
• Evidence Weathering, erosion and other geologic
  processes happen slowly. Therefore the Earth must
  have been shaped slowly.

9
Conclusion

• Earth has been shaped by a combination of
  catastrophism uniformitarianism.
• Most geologic change is slow gradual.
• But catastrophes have contributed to shaping
  Earth.