FINAL KIEL FOSSILS

10. Explanation of why layers of the Earth might be altered include:

• The Law of Superposition
• The Law of Gravity and the Law of Motion
• Principle of Cross-Cutting Relationships
• Radioactive isotopes

9. Which is true about absolute dating?

• It uses the half-life of isotopes to get the exact age of a rock or mineral
• The law of superposition is used to determine the absolute date of rocks
• Index fossils are compared to like fossils in other strata to determine absolute age
• It uses half-life to determine the length of time an organism lived in various time periods

6. How old is the earth?

• 5 billion years old
• 4.9 billion years old
• 4.6 billion years old
• 4.5 million years old

5. What evidence do scientists use to determine the age of the Earth?

• Index fossils
• Earth strata
• Radioactive Dating
• All of the Above

2. Dinosaurs ruled the Earth in what period?

• Precambrian Time
• Paleozoic Era
• Mesozoic Era
• Cenozoic

12. The study of rock layers that is part of geology is known as__________.

• Layerology
• Stratigraphy
• Sedimentraphy
• Paleontology

11. What characteristics must index fossils have?

• Long life span, lead isotopes
• 10 feet under ground and from animals, not plants
• small and round
• Recognizable, short life-span, wide distribution

8. If the same index fossils are found in different rock strata miles apart, what is probably true about the rock layers?

• The strata occurred at different periods
• They are not both index fossils
• The fossils are from different organisms
• The strata are from the same relative time period

1. In what geological era are we currently living?

• Precambrian Time
• Paleozoic Era
• Mesozoic Era
• Cenozoic

3. Which of these time periods lasted the longest?

• Precambrian Time
• Paleozoic Era
• Mesozoic Era
• Cenozoic