Fast and Slow

Compare sudden changes (landslides, eruptions) with slow ones (canyons).

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 8

Some changes are sudden. A landslide can reshape a hillside in moments.
Others are slow. Canyons and deltas take thousands of years or more.
Slow changes add up. A drip of water, year after year, can do what a flood can't.

Georgia Standards of Excellence in Science:

S5E1.a — Construct an argument supported by scientific evidence to identify surface features (examples could include deltas, sand dunes, mountains, volcanoes) as being caused by constructive and/or destructive processes (examples could include deposition, weathering, erosion, and impact of organisms).
S5E1.b — Develop simple interactive models to collect data that illustrate how changes in surface features are/were caused by constructive and/or destructive processes.