01_03_earths_early_etmosphere

.docx

School

Miami Dade College, Miami *

*We aren’t endorsed by this school

Course

1005

Subject

Biology

Date

Feb 20, 2024

Type

docx

Pages

Uploaded by MasterWillpowerGerbil9

1.3 Biology Notebook: Earth’s Early Atmosphere Page 1: Origin of Life on Earth What makes Earth an ideal home for its diverse inhabitants? Key Terms: Jot down terms and definitions that are new to you. You will see them used in the lesson. Page 2: The Early Earth What was Earth’s early atmosphere made of? Compare and contrast early Earth and modern Earth. What are organic molecules? Why are scientists interested in the origin of organic molecules? What are two examples of organic molecules that scientists think first formed? Why are the reactions that occurred in early earth different from modern Earth? Page 3: Chemical Experiments What hypothesis did Miller and Urey want to test? What did their experiment produce? What did they add to make it like Earth’s early atmosphere? Where did they think that the energy came from to cause this process to occur? 1 Unless Otherwise Noted All Content © 2023 Florida Virtual School. FlexPoint Education Cloud™ is a trademark of Florida Virtual School.

What was formed based on the results of the experiment? Page 4: Chemical Evolution What is another way that organic molecules might have arrived on Earth? How did large organic molecules form without the presence of enzymes? What do all living organisms contain? Explain the RNA world hypothesis. (Be sure to explain the significance of both DNA and RNA) Define catalyst. Explain what helps RNA catalyze. Page 5: Early Cells Describe the earliest cells. Did the first prokaryotic cells need oxygen? How did the first prokaryotic cells obtain energy? Define heterotroph. What did the early cells have as a food source? List the four types of cells found today that scientists believe are similar to the early cells on Earth and one interesting fact about each. 1. 2. 2 Unless Otherwise Noted All Content © 2023 Florida Virtual School. FlexPoint Education Cloud™ is a trademark of Florida Virtual School.

3. 4. What does fossil evidence show us about the earliest and most abundant autotrophic cells? What are cyanobacteria and why are they important? As cyanobacteria and other autotrophs increased, how did the atmosphere change? What became the dominant life forms on the planet as the oxygen became more abundant? Page 6: Formation of Microspheres What is a microsphere? Microspheres are not cells, but they do have similar characteristics. Identify the characteristics of microspheres. How do microspheres grow and what happens when it reaches an unstable size? How does the hypothesis of microspheres build on the RNA world hypothesis? Practice question: If there was not an increase in cyanobacteria in early Earth, what would have happened to Earth’s early atmosphere? A. The amount of oxygen would have increased, causing an increase in aerobic autotrophs and heterotrophs B. The amount of oxygen would have increased, causing a decrease in aerobic autotrophs and heterotrophs. C. The amount of oxygen would have decreased, causing an increase in aerobic autotrophs and heterotrophs. 3 Unless Otherwise Noted All Content © 2023 Florida Virtual School. FlexPoint Education Cloud™ is a trademark of Florida Virtual School.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

D. The amount of oxygen would have decreased, causing a decrease in aerobic autotrophs and heterotrophs. Which best describes the atmosphere of the early Earth? A. Little or no oxygen, mostly carbon dioxide, water vapor, and nitrogen B. Little or no carbon dioxide, mostly oxygen, water vapor, and nitrogen C. Little or no water vapor, mostly oxygen and carbon dioxide, with some nitrogen D. Large amounts of hydrogen cyanide with low amounts of carbon dioxide and oxygen 4 Unless Otherwise Noted All Content © 2023 Florida Virtual School. FlexPoint Education Cloud™ is a trademark of Florida Virtual School.

Recommended textbooks for you

Biology: The Dynamic Science (MindTap Course List)

Biology

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Cengage Learning

Biology Today and Tomorrow without Physiology (Mi...

Biology

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cengage Learning

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

Biology

ISBN:9781305967359

Author:STARR

Publisher:CENGAGE L

Biology (MindTap Course List)

Biology

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Cengage Learning

Biology: The Unity and Diversity of Life (MindTap...

Biology

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cengage Learning

Biology: The Unity and Diversity of Life (MindTap...

Biology

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cengage Learning

SEE MORE TEXTBOOKS

Recommended textbooks for you

Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Biology: The Unity and Diversity of Life (MindTap...
Biology
ISBN:9781305073951
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cengage Learning
Biology: The Unity and Diversity of Life (MindTap...
Biology
ISBN:9781337408332
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cengage Learning