Rock Cycle: Weathering CER Claim Evidence Reasoning

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Sarah's STEM stuff
Grade Levels
4th - 7th, Homeschool
Resource Type
Formats Included
  • PDF
12 pages
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Hands on student centered experiment to learn about the rock cycle. Students will be focusing their experiments on chemical weathering to see how temperature affects how quickly an alka seltzer will dissolve. Students will come up with 4 tests to determine how temperature affects the rate of dissolution.

Students write scientific arguments with Claim, Evidence, and Reasoning to explain how climate affects the rate of weathering. The resource includes a presentation to guide students through the activity and a focused reading to help explain the science concepts while writing their arguments.

Materials - (per group)

• 4 alka seltzers

• clear plastic cup or beaker

• thermometer

• timer

• waste container or access to sink

(For the class to have access to)

• Hot water

• Ice

• Room temperature water

See it in action on my blog!

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Total Pages
12 pages
Answer Key
Teaching Duration
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to see state-specific standards (only available in the US).
Construct an explanation based on evidence for how geoscience processes have changed Earth’s surface at varying time and spatial scales. Emphasis is on how processes change Earth’s surface at time and spatial scales that can be large (such as slow plate motions or the uplift of large mountain ranges) or small (such as rapid landslides or microscopic geochemical reactions), and how many geoscience processes (such as earthquakes, volcanoes, and meteor impacts) usually behave gradually but are punctuated by catastrophic events. Examples of geoscience processes include surface weathering and deposition by the movements of water, ice, and wind. Emphasis is on geoscience processes that shape local geographic features, where appropriate.
Develop a model to describe the cycling of Earth’s materials and the flow of energy that drives this process. Emphasis is on the processes of melting, crystallization, weathering, deformation, and sedimentation, which act together to form minerals and rocks through the cycling of Earth’s materials. Assessment does not include the identification and naming of minerals.
Make observations and/or measurements to provide evidence of the effects of weathering or the rate of erosion by water, ice, wind, or vegetation. Examples of variables to test could include angle of slope in the downhill movement of water, amount of vegetation, speed of wind, relative rate of deposition, cycles of freezing and thawing of water, cycles of heating and cooling, and volume of water flow. Assessment is limited to a single form of weathering or erosion.


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