Benchmark Question: Where is water found on Earth and
what are its characteristics?
Focus Question: What are the different states of
water on the Earth’s surface?
In the teacher-guided
demonstration, the teacher will place soil or sand in a plastic container
with a cover (clear rectangular works best). Using a scale, students will
weigh the tightly sealed container and record their findings. The teacher
will add ice to the container, seal it, and re-weigh the container.
Students will record this data. The container should be moved to an
observable place and slightly elevated at one end.
The teacher should pose the
focus question and allow students to record a prediction. Using a table to
record date and time, students should draw or describe their observations
after the container is sealed for five days. The students will make several
observations of the sealed container and record and draw (or describe)
their observations. Students will participate in discussions around the
On the last day of the
demonstration, the teacher will weigh the container. The students will
compose written draw conclusions based on their observations and the class
discussions in regard to the focus question. They will also include a
comparison between their predictions and results of the demonstration.
Note: If the container is
tightly sealed there should be little change in the weight of the