Benchmark Question: How do the EarthÕs features change
Focus Question: How does water erosion change the
EarthÕs surface over time?
The teacher will pose the
focus question and facilitate a discussion to assess the studentsÕ prior
Students will create their
own models of a hill using Earth materials (boulders, gravel, sand, clay).
Students will describe their models in writing, orally, or in a labeled
drawing. Using a cup with small holes in the bottom, students then will
pour water, one cup at a time, to simulate a rainstorm. After each cup,
students will describe the changes in their models and the process
(erosion) that causes these changes. In this way, students will demonstrate
how the process of erosion, caused by moving water, changes the EarthÕs
Students will discuss the
changes that occur due to the process of erosion.
Students will predict the
effects on their model if a heavy rainfall occurs over many days. The
teacher will correct any misconceptions. (List some possible misconceptions
that students might have like weathering and erosion being synonymous. Weathering
breaks down the material IN PLACE whereas erosion involves the TRANSPORT of
material away from the original site)
Results of erosion:
- movement of Earth material