Summary
Students will research and analyze theories on why dinosaurs became extinct.
Materials
- Chart paper
for
brainstorming
ideas
- Access to the
internet (If not
possible print
off needed
information and
make copies for
the students)
- Books or
articles on the
theories of
dinosaur
extinction
- Dinosaur
Extinction
Theory Form (pdf)
- Lined paper for
students
formulated
questions
Additional Resources
Books:
- Exline, J., et al: 2002, Earth's Changing Surface, Prentice Hall, New Jersey
- Moyler, R., Daniel, L., Hackett, J., Baptiste, P., Stryker, P., Vasquez, J.: 2000,
Learning About Earth's History. McGraw Hill, New York
- Moyler, R., Daniel, L., Hackett, J., Baptiste, P., Stryker, P., Vasquez, J.: 2000,
Classifying Living Things, McGraw Hill, New York
- Living Things, McGraw Hill, New York
- Palmer, D.: 1996, Pocket Fossils, DK Publishing, New York
Background for Teachers
There are varied theories as to what caused the extinction of the dinosaur. As
evidence and information is gathered, some ideas become more widely accepted than do
others. Some causes of extinction are as proposed:
- The Asteroid/Meteor Impact Theory
- Volcanism Theory
- Plate Tectonics
- Marine Regression
- Mammal Competition
- Disease/Epidemic
- Super Nova
- Cosmic Ray/Radiation
- Climate Changes/Orbital Changes
- Vegetation Changes
http:// www.zoomdinosaurs.com/ has some excellent background information under Extinction:
Why did the dinosaurs go extinct? Share the "Studying Extinction" information with
the class before they begin their research. It will explain in simple terms to students
how fossils can tell the history of Earth. "What is Extinction", "The Alvarez Asteroid
Theory," and "Other K-T Extinction Theories" are good sources for the students to get
research information from.
Intended Learning Outcomes
1. Use science process and thinking skills
2. Manifest Scientific attitudes and interests
3. Understand science concepts and principles
4. Communicate effectively using science language and reasoning
Instructional Procedures
Pre-Assessment/Invitation to Learn
- Tell the students that one of the great, unsolved mysteries in science is the
disappearance of the dinosaur.
- Pose the question “What happened to the dinosaur?” to the students.
- Brainstorm and record all the students’ responses as to what they think caused
the disappearance of the dinosaurs.
Instructional Procedure
- Using books, articles or the internet have students research one of theories
explaining the extinction of dinosaurs. (See students Websites under
Additional Resources for research locations on the web.)
- Have the students take notes as they research. They will need to find clues as
to what the cause may have been. Have them record the evidence that they find
to support their theory on the Dinosaur Extinction Theory page. They should
also record weaknesses in the theory.
- Have the students formulate three to five questions that can be answered using
the information they have gathered on the extinction of dinosaurs.
- Have the students trade papers and have a partner answer their questions.
Extensions
Language Arts-
- Have a debate featuring the two most popular theories, asteroid extinction vs.
volcanic extinction. Have each group present their findings. Have the students
use scientific evidence to back up their theory. (Standard I, Objective 1,2)
- Students could study several theories of extinction. They will need to compare
the information gathered for different theories and then decide which theory they
think is the most likely cause of dinosaur extinction. (Standard VII, Objective
1, 2, 3)
- Have a “Scientific Conference.” Each group will present and defend their
theory in a debate with other “scientists.” Explain and discuss the nature of a
scientific theory. Discuss why evidence sometimes leads scientists to disagree
about theories. (Standard VIII, Objective 6)
Homework and Family Connections
- Have the students ask their parents how they think the dinosaurs became
extinct. Then have the students tell their family and parents different theories
for their extinction. Have a discussion about it. (Dinosaurs Extinction Theory
Page)
- Have the students tell their parents about the debate (if they had one in class)
and the position they took for the argument.
- Send home the websites listed above for the students to look up more
information about dinosaur extinction.
Assessment Plan
- Evaluate the questions the students formulated against the notes they took and
the theory page they filled in. Were the questions formulated based on the
research done?
- Have the students do a persuasive writing response on the theory they chose.
Have them give evidence for possible correctness of their theory (or evidence
that disproves their theory).
Created: 08/10/2004
Updated: 08/11/2022
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