How Do We Clean Our Drinking Water?

Materials

• 4 coffee filters

• 2 cotton balls

• Scissors

• 1/2 cup pea gravel

• 1/4 cup sand

• 2 16 oz water bottles (empty)

• 1 tbs potting soil

• 2 small rubber bands

• Plastic beaker or cup

Virginia Science Standards of Learning - 4th Grade

4.1 The student will demonstrate an understanding of scientific reasoning, logic, and the nature of science by planning and conducting investigations

4.5 The student will investigate and understand how plants and animals, incuding humans, in an ecosystem interact with one another and with the nonliving components of the ecosystem.

4.9 The student will investigate and understand important Virginia natural resources.