Name ______Date ______
Explorations Through Time
Life Has a History
Level 2
1. How many different species of living things exist today? ______
2. Which group of animals has the largest number of species? ______
3. How many mammal species exist today? ______
4. Number the organisms from 1 (most abundant) to 8 (least abundant)
___Plants ___ Protists ____ Mammals ____ Molluscs
___ Fungi ___ Roundworms ____ Arthropods ____ Flatworms
5. What is biodiversity (click on the purple links for definitions)
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6. 470 Million Years Ago
What was the name of the period? ______
What was the dominant predatory? ______
What was the first arthropod
7. 160 Million Years Ago
What was the name of the period? ______
What large marine reptile existed? ______
8. How old is the earth? ______
9. Fill in the blanks of the timeline
10. The best source of evidence for determining events in earth's history is ______
11. What is a paleontologist? ______
12. Identify three fossils from the image. Name them and point to them with an arrow
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______
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13. What features are found in therapods
______
______
14. What is a cladogram?
______
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15. What is divergence?
______
16. To which animal are the crane and eagle most closely related? ______
17. What other data (besides physical features) do scientists use to find if organisms are related? List 3 things. ______
18. What birds on the Galapagos islands were adapted to different regions? ______
19. The beaks of the birds vary with what? ______
20. What would happen if the environment changed and only plants with larger, harder seeds survived.How do you think that might affect the population of Geospiza fortis finches?
______
21. What is geographic isolation? ______
22. Identify the extinct creature. ______
23. Name two animals that have gone extinct since humans have been around. ______
Go back to the first page of this activity
Go toUnderstanding Geologic Time
- When did each of the following events occur?
- The Earth and moon form ______
- Earliest life appears ______
- Early land plants form ______
- Largest Mass Extinction occurs ______
- Dinosaurs become extinct______
- “Lucy” the early hominid appears______
- What is a timeline?
3. Relative time is recorded in ______.
4. What is the Law of Superposition?
5. The Law of Superposition gives us the ______age of fossils.
6. Radiometric dating gives us the ______age of rocks.
7. What is the Geologic Timeline?
8. Scientific evidence suggests that the Earth is ______.
9. Evidence of past events in Earth’s ancient history is provided by ______.
10. The Law of Superposition allows us to determine ______.
11. Radiometric dating allows us to determine ______.