ESS2-2 History of the Earth
Construct an explanation based on evidence for how geoscience processes have changed Earth’s surface at varying time and spatial scales. [Clarification Statement: 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.]
Chalkboard Chalk ( you can break them in half if needed)
This lab is a fun way to integrate social studies into science. We discussed the Cleopatra's Needle in NYC and how weathering and erosion has taken place. I show students a video clip from YouTube about hieroglyphics. They have fun coming up with a design to etch into the chalk. Student use a paper clip to etch their design into the chalk.
Then, they watch vinegar erode the chalk and their hieroglyphic design. I have questions that ask them about slow and rapid changes due to erosion. There is also another question about erosion where they live.
Make sure to have fresh vinegar and plain chalk made of calcium carbonate to see the most erosion.