Science

Lesson 7 Where does the soil go?
Reflectons: How is the speed of the stream related to the way water erodes or deposits soil?

Faster flowing streams have much greater power that can cause more erosion than slower moving streams. They can carry larger sediments like gravel, rocks, and boulders. Slow moving streams can carry only sand and smaller sediments.

During a heavy rainstorm, what do you think would happen to the soil on a steep hill? It would quickly erode, be carried along by the water and deposited.

Why do you think this would happen?

The steeper the terrain or land, the faster the water will flow and more erosion will occur

Lesson 5 Examining Earth Materials 1 2 3 4 5

Lesson 3: Modeling Rain on Land 1) What happened to the land as it rained? Why? The land started to wash away and move into a different area. Group 3 The rain water started to mix with the soil and made it all dirty and all of it drained out into the bucket Group 2  3) Where did the water go? The water flowed off of the soil and into the bucket but it was not clean Group 3

4) Compare the water in the bucket with the water you rained on the land. How are they different? Can you explain why?

The water that was in the bucket was different because it was way more dirty because the dirt got mixed with the water and that is why the dirty and not clean. Group 3

PREDICTION: Predict what will happen with the runoff water when it sits overnight. Will it dissolve? Will it evaporate? Will it settle? How will it look? Class: We think the soil, rock, and clay will settle to the bottom of the bucket and most of the water will remain clear. There might be some deposits in the water.

= Reflections: Lesson 4 Investigation Streams =