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2.4. I'LL DRINK TO THAT!
(Level: 5 : 8 :: Water Cycle)
Purpose: To observe a water cycle.
What You Need: 500 ml flask :: one-hole stopper with
glass tube :: 125 ml dirt :: plastic or rubber tubing :: 1 L
beaker :: small beaker :: clean water :: hot plate :: ringstand
:: clamp :: 15 ml salt
What You Do:
- Half-fill a flask with water and add some dirt. Stopper the
flask with the glass tube and attach a long plastic tube.
- Allow the remaining tubing to pass through a beaker of cold
water. Insert the end of the tube in a clean beaker.
- Apply heat to the water in the flask over a hot plate and
observe what happens. (If you add a tablespoon of salt to your
solution it will come to a boil more quickly. The water passing
into the clean beaker will be freshwater and the salt will remain
behind in the original flask.
Questions:
- What two processes are occuring as the water collects in the
jar?
- How does this experiment represent a water cycle in
nature?
- Is the water that you started with different from the water
you finished with? Would you drink the water that collected in
the jar? Why or why not?
Click here to see the answers to these questions.
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of activities for this unit.
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