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Q 1/20
Score 0
Which undisturbed rock layers are most likely to contain fossils similar to modern organisms?
30
Layers deep down
Layers near the ocean
Layers on top
Layers near volcanoes
Q 2/20
Score 0
2. Scientists find dinosaur bones in the BOTTOM rock layers of a cliff and fossils of mammals in the middle layers in the cliff. Which could best be concluded from this evidence? (draw a picture- it will help you!)
30
Dinosaurs and mammals lived at the same time
Dinosaurs ate plants
Dinosaurs were eaten by mammals
Dinosaurs lived on Earth before mammals.
20 questions
Q.
Which undisturbed rock layers are most likely to contain fossils similar to modern organisms?
1
30 sec
Q.
2. Scientists find dinosaur bones in the BOTTOM rock layers of a cliff and fossils of mammals in the middle layers in the cliff. Which could best be concluded from this evidence? (draw a picture- it will help you!)
2
30 sec
Q.
3. Which rule states that undisturbed rock layers are found with the oldest layers deeper down and the youngest layers on top?
3
30 sec
Q.
4. Carbon-14 is a radioactive isotope with a half life of 5.730 years. After 11.640 years, what percentage of the Carbon-14 would be left? (remember you start with 100%) remember the graph we drew at the beginning.
4
30 sec
Q.
5. What are index fossils useful to geologists?
5
120 sec
Q.
6. What do the first three eras of the geological time scale have in common?
6
120 sec
Q.
7. How do trace fossils differ from other types of fossils, like cast or mold fossils?
7
120 sec
Q.
8. A scientist finds the bones of a dinosaur. What could help the scientist determine the RELATIVE age of the bones?
8
120 sec
Q.
9. A fault cuts across 4 rock layers. Which of the following is true?
9
120 sec
Q.
10. Over the course of the Earth's history, life has...........
10
120 sec
Q.
11. Which of the following is most likely to be used as an index fossil?
11
120 sec
Q.
12. In which type of rock are fossils most likely to form?
12
120 sec
Q.
13. Climatologist study the history of Earth's changing climate. Which of the following would a climatologist most likely look for as evidence?
13
120 sec
Q.
14. Why are trilobites used as index fossils so often?
14
120 sec
Q.
15. How are relative dating and absolute dating different from each other?
15
120 sec
Q.
16. Where in a rock formation will you find fossils of the most simple organisms?
16
120 sec
Q.
17. What could explain what happened if the youngest rock layers were NOT found on top?
17
120 sec
Q.
18. If 20 grams of an element has a half life of 1000 years, how much would be present after 3000 years? ( don't forget the zero when you work this problem!!)
18
120 sec
Q.
19. What is true about this rock layer?
19
120 sec
Q.
20. What is the most recent rock layer formed in the Grand Canyon?
