Life Has a History Scavenger Hunt

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Life Has a History Scavenger Hunt

Life Has a History Internet Lesson Name: ______Date: ______Per: ___ http://www.ucmp.berkeley.edu/education/explorations/tours/intro/Intro5to12/tour1nav.php

As you navigate through Life Has A History, keep your eyes open for answers to the following questions.

1. Find the information describing the 30 million species of living organisms. Of that 30 million, how many are NOT animals? [HINT: Subtract the total number of animal species currently known from 30 million.]

2. Find the three lens views comparing the oceans through time. Name one animal common to today's ocean whose relatives were also around 470 million years ago.

3. Find the timeline. How many millions of years did dinosaurs exist on Earth before they became extinct (you need to do some subtraction again)?

4. What is one of the best sources of evidence for the history of life on Earth?

5. Find and name at least five things other than bones that can be preserved as fossils.

6. Find a picture of Deinonychus and three of its relatives. What features do the birds all share that Deinonychus does not?

7. During this tour, you will learn about cladograms. When you reach that point, complete this sentence:

A cladogram is a diagram that shows...

8. On the cladogram below, the common ancestor of the crane and eagle is circled. Find and circle the common ancestor of the crane, eagle, Archaeopteryx, and Deinonychus.

Deinonychus Archaeopteryx crane eagle

9. Which animal on the cladogram are the crane and eagle most closely related to? How do we know this?

10. How can variations in a species lead to evolution?

11. Find the bar graph that shows the differences in beak size among three species of Galapagos finches. Name the species of finch that has a beak that can be longer than 15 mm.

12. Find the page showing three graphs side by side. The graph on the right shows an increase in the finch's body and bill size. Why did that happen?

13. Natural selection is not the only mechanism of evolution. What else can change the genetic make-up of a population?

14. What is a quagga and why can't you have one for a pet?

15. How did Lambeosaurus use its nasal passage?

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