1 (Take out Lab pages & 26, 27 & 29) Day 17 How is angular sand different from rounded sand? (Include picture) Angular sand has sharp edges. Rounded sand is smoother. How is well-sorted sand different from poorly sorted sand? (Include picture) In well-sorted sand, most of the particles are about the same size. Poorly sorted sand includes particles of all different sizes.

2 Stream Table (Part 3) Investigation 4 My Sediments Exactly

3 Real vs. Diagram Exercise 4.3 3

4 Label the plastic tray, the sand, and the dropper in your lab notebook 4

5 Captions Exercise 4.4 5

6 This portion of the “monster panorama” shows some of the unofficial names given to rocks at the PATHFINDER landing site. Barnacle Bill, Yogi, Scooby Doo, and Lamb have been investigated by the Sojourner rover and its alpha proton X-ray spectrometer. Couch is a large rock on the horizon. The names are used by the Pathfinder team to help identify and keep track of the many rocks at the landing site. What is the purpose of this caption? 6

7 Look at the bottom image on page 37 7

8 Models What is a model? an object or system that is very large, very small, or remote in time and space a process that happens very slowly or quickly a process or system that is dangerous or costly A representation of something that is difficult to observe directly:

9 Called a stream table Represents the Colorado Plateau and the Colorado River Today's Model

10 Erosion -- the removal and transportation of loose earth material Stream Table Vocabulary Deposition -- the settling out of eroded earth material Sediments -- the particles of earth material that settled out of the water

11 Station 1: Stream Table Observe the stream table and record observations on Lab p. 26&27. (Use R. Book page 36 to include 9 vocab.) Station 2: Multimedia Stream Table Modify one variable for each simulation. (Divide p. 29 in 1/2, explain everything.) Station 3: Resources Book Reading Read Grand Canyon Flood! (Pages & Think Questions in Notebook, label, use complete sent.) Station Assignments

12 Discuss Observations What were some landforms that were created in the stream table? canyon, delta, meander, plateau What happened to the different-sized particles that were eroded by the water? The smaller, finer particles were carried farther downstream.

13 Discuss Observations What would happen to the earth material if we let the water run for several days? It might completely erode away. In the multimedia stream table, why didn't the bottom layer erode as quickly as the top? The middle layer of clay protected it.

14 (Take out Lab pages 26, 27 & 29) Day 17.5 What is a fossil? Why are igneous and metamorphic rocks not good for finding fossils? A fossil is a remnant or trace of a plant or animal embedded and preserved in a rock. Igneous rocks form when molten rock cools and hardens. Molten rock is much too hot to preserve fossils. Metamorphic rocks form when an existing rock changes because of heat and/or pressure, which will usually destroy any fossils in the original rock.

15 Station 1: Stream Table Observe the stream table and record observations on Lab p. 26&27. (Use R. Book page 36 to include 9 vocab.) Station 2: Multimedia Stream Table Modify one variable for each simulation. (Divide p. 29 in 1/2, explain everything.) Station 3: Resources Book Reading Read Grand Canyon Flood! (Pages & Think Questions in Notebook, label, use complete sent.) Station Assignments

16 Discuss Observations What were some landforms that were created in the stream table? canyon, delta, meander, plateau What happened to the different-sized particles that were eroded by the water? The smaller, finer particles were carried farther downstream.

17 Discuss Observations What would happen to the earth material if we let the water run for several days? It might completely erode away. In the multimedia stream table, why didn't the bottom layer erode as quickly as the top? The middle layer of clay protected it.