Exploration Through Time

Name ______

Exploration Through Time “Life Has a History” http://tinyurl.com/2kxl9

-Go to LIFE HAS A HISTORY and click on LEVEL 2

-Read the intro page so you know how to navigate through the site

-When you are read click NEXT in the lower right hand side of the screen

-Go through the tutorial and answer the following questions:

1. How many different species of living things exist today? ______

2. How many animal species are known to exist today? ______

3. Which group of animals has the largest number of species? ______

4. How many mammal species exist today? ______

5. Number the organisms from 1 (most abundant) to 8 (least abundant)

___ Plants ___ Protists ___ Mammals ___ Molluscs

___ Fungi ___ Roundworms ___ Arthopods ___ Flatworms

-Click on each animal group so that a picture appears, once you have clicked them all click NEXT

- Click NEXT

- Click on the word GEOLOGIC TIME and click on LIST ALL TERMS 6. Define the following in your own words: a) biodiversity-

b) evolution-

c) fossil-

d) natural selection-

e) speciation-

7. Click on 470 Million Years Ago a) What was the name of the period? ______b) What was the dominant predator? ______c) What was the first arthropod? ______

8. Click on 160 Million Years Ago a) What was the name of the period? ______b) What large marine reptile existed? ______

9. Click on Present a) What is one reason why coral reefs are important? ______

- Click NEXT

10. How old is the Earth? ______

11. Fill in the blanks of the timeline 12. The best source of evidence for determining events in earth's history is ______

13. What is a paleontologist? ______

14. Identify three fossils from the image. Name them and point to them with an arrow ______

15. What are 2 features found in therapods? (click on the word therapod) ______

16. What is a cladogram?______

17. To which animal are the crane and eagle most closely related?______18. What other data (besides physical features) do scientists use to find if organisms are related? List 3 things. ______

19. What type of birds on the Galapagos Islands were adapted to different regions? ______

20. The beaks of the birds vary with what? ______

21. 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? ______

22. What is geographic isolation? (click on the word geographic) ______

______

23. What is the name of the creature below: ______

24. Name two animals that have gone extinct since humans have been around. ______