Benchmark Question: How does water move?
Focus Question: Which way does water flow?
Students will work in groups
to determine that water flows downhill. The teacher will ask students about
their visits to lakes or rivers and what they have observed about the
movement of the water. The teacher then will pose the focus question and
set up the following model of a river (See River Model Diagram below).
- Cut one piece of aluminum foil 24Ó long.
- Fold it in fourths to make a trough.
- Cut a V-shaped notch out of the top of the
Styrofoam cup, fill the cup with water, and add two to four drops of
- Put the cup on the table and cradle the
aluminum foil trough in the ÒVÓ in the cup. This allows one end of the
trough to be elevated.
- Have the other end extend just over the edge
of the table.
- Place a bucket under the lower end of the
- Fill a spray bottle about halfway with
The teacher will ask
students to spray different parts of the model and observe where the water
flows. Students will explain how the water flowed on the model. During
discussion, be sure to include how water flows down hillsides or slopes.
The teacher will ask students what each part of the model represents: cup =
mountain, trough = river, bucket = lake, spray = rain.