Q1 Science Study Guide

Name:

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3.2 Explain why you them in that order

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4. Why do we find more fossils of organisms such as snails and vertebrates than organisms such as jellyfish?

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6. How do fossils of limb structures provide evidence that ancient and modern tetrapod's are related?

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7. Trilobite fossils have been found in rock that is 521 million years old. They have also been found in rocks that are more than 252 million years old. Trilobite fossils have not been found in younger or older rocks. What does this tell you?

• Trilobites became extinct 252 million years ago.
• Trilobites became extinct 521 million years ago.
• Trilobites lived on Earth for 252 million years.
• Trilobites lived on Earth more than 521 million years ago.

8. Compare the limbs of the modern vertebrates. Which statement best explains the similarities between the limbs? (Mark the one best answer.)

• All four vertebrates move in the same way.
• These four vertebrates share a common ancestor.
• The limbs can be used in water or on land.
• A lizard is an ancestor of a frog.

9. An organism from the past that is related to all the organisms in the group

• Fossil
• Common ancestor
• Cladogram
• Descendant

10. The variety of life forms that exist on Earth

• Chromosome
• DNA
• Biodiversity
• Evolution

11. An evolutionary tree diagram based on shared characteristics

• Family Tree
• Chromosome
• DNA
• Cladogram

12. A rock that forms when layers of sediments are stuck together.

• Fossil
• Sedimentary rock
• Body fossil
• Tetrapod