Press Chap/Frame, 1, Search to see the menu. (Be sure the display says CHAPTER before pressing 1.)
1. What might account for the color of this water?
2. What other natural forces erode rock?
3. What happens to the rock material as it is worn away?
4. How might sedimentary rocks form?
5. Grand Canyon: How might you determine the ages of the rocks you see here?
6. How do rocks and fossils relate to each other in determining age?
7. Count the number of ticks and multiply by 2 million to determine the age of the Grand Canyon.
Press Chap/Frame, 7, Search
1. At each slide, try to figure out what made the tracks. PRESS Still/Step FWD
2. Observe the next 12 slides. These are fossil tracks of various dinosaurs. What are some limitations in determining the identity of the makers?
3. Examine the four slides showing the footprints found at Laetoli. They are thought to be of australopithecines. What are some limitations in interpreting these fossils?
4. The next four slides show the trackways of primates. What is the difference between those of humans and other primates?
5. Based on tracks, would australopithecines be classified with humans? Explain.
Press Chap/Frame, 9, Search
1. Go back and forth as much as you need in order to make a list of similarities and differences.
|LEG & ARM LENGTH|
Press Chap/Frame, 11, Search
1. Go through the series of slides. What might happen to the population of flies if the farmer didnŐt use pesticides? Explain.
2. How might natural selection occur with the use of pesticides?
Press Chap/Frame, 12, Search
1. Use Still/Step FWD to observe the next 18 slides. List as many ways these plants are adapted to desert life as you can.
Press PLAY to observe the next two sequences.
2. Design (draw and describe) the perfect desert animal.
Press Chap/Frame, 13, Search
1. A species does not interbreed in nature for various reasons. Are the grouse and the prairie-chicken separate species? Explain.
Press Chap/Frame, 1, Search to return to the menu. Use the remaining time to peruse any of the other chapters that look interesting.