Materials
Rock collection with rocks of varying sizes Balance scale
Large piece of white paper
Instructions
1. Set out the rocks, the scale and the paper.
2. Let the children sit around the table so that every one can see the rocks and the paper.
3. Have a child choose a large rock and place it on the scale.
4. Ask the children how many smaller rocks they think it will take to lift the large rock.
5. List the children's responses on the paper.
6. Now let the children place rocks on the scale until the large rock balances.More to doMore science: At circle time discuss the activity and why the children think the smaller rocks moved the large rock.
