5th Grade: In preparation for our trip to the Marin Headlands, the 5th graders will be reviewing evaporation and it's role in the water cycle. We are examining water distribution on earth, and sources of fresh water for human consumption. Our classes this week will consist of some demonstrations, reading, and a water cycle game. Key questions: Where is most of water on earth found? What are some locations that fresh water is found? How does temperature affect weather?
4th Grade: The fourth graders will learn about calcite, a very common mineral. On Monday, they tested four rocks (limestone, basalt, marble, sandstone) for calcite by placing them in a weak acid, vinegar. When calcite comes in contact with acid, it reacts to form carbon dioxide bubbles. Later in the week, the students will learn about where calcite is formed, and how rocks (like marble) can be used in buildings. Key questions: How did you know limestone and marble contained calcite? Why can't we see the calcite itself in the rock? What other types of rock contain calcite? How do geologists test for calcite in the field?
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