In Science Class . . . Week of 1/4

The fourth and fifth graders will learn about calcite, a very common mineral. On Tuesday, 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?