1Daily Warm-Up Exercises Day 14 What are sediments? Sediments are particles that settle when whatever is carrying them slows down. How do sediments tend to settle? They tend to settle in horizontal layers, with new layers forming on top of old layers.

2 Sand (Part 1) Investigation 4 My Sediments Exactly

3 Quick Write What events or processes do you think caused the Grand Canyon layers to form? Write the answer on the bottom of Grand Canyon Rock Ages.

4 Consider Sandstone How do we know a rock is sandstone? –Grainy, gritty texture, sand comes off when rubbed, acid soaks in What is sandstone made of? –Sand

5 Which came first? Which came first -- sand or sandstone? sand Where could the sand have come from? a beach or a desert broken-up sandstone a broken-up rock other than sandstone

6 Focus on Sand Each group can use: –1 plastic jar with a lid –5 pieces of granite –hand lenses How can you use these materials to test the idea that sand comes from broken-up rocks?

7 Record your Results Draw and describe what you see through the hand lens. Draw the shapes of the sand particles, not just dots!!!!! Describe the sand in terms of size, shape and color.

8 Record your Results Draw and describe the fresh chunk of granite. Draw and describe the shaken chunk of granite.

9 Observations Fresh Granite Size (cm): Shape: Color/Comp: Shaken Granite Size (cm): Shape: Color/Comp: Sand from Granite Location: Shape: Sorting: Grain size: Color/Comp:

10 Sand Analysis Sand analysis criteria: –Location –Shape –Sorting –Grain size –Composition / color Wentworth Scale: Used to classify grain size * Use pages 22, of the EH Resources book.