2. Water is absorbed by some materials.

3. Water beads up on some material.

4. Q: Why does water make a sponge expand?

5. Q: Does squeezing the dropper gently make the water fall more slowly?

6. Q: Would water bead up more easily (form better domes) on foil that is not wrinkled?

7. Water forms a dome on a flat surface.

8. Surface tension makes water form a sphere or a dome.

9. Soap added to water reduces its surface tension.

10. Q: Would the surface tension be the same on a dime?

11. Q: What else could we add to water to change its surface tension?

12.  Water flows DOWN a slope.

13.  Bigger domes of water move down a slope faster.

14.  Water flows faster down a steeper slope.

15. Q: How does water get clean?

16. Q: What stopped some of the water drops from flowing down the slopes?

17. Q: Can we speed up the flow by using another surface, like glass?

18.  Water expands when heated.

19.  Water contracts when cooled.