The Water Cycle Model

Aim/Purpose:

To Demonstrate the Water Cycle Visually

Apparatus/Materials:

• 250ml beaker
• 2 test tubes
• test tube rack
• stand, boss heads and clamp
• silver nitrate solution
• crushed ice and hand towel
• bunsen burner, tripod and gauze mat
• distilled water
• salt water solution

Method/Procedure:

• Pour a small amount of saltwater into beaker and place it on the tripod with gauze mat
• Heat the solution up with bunsen burner
• Fill a test tube with ice and keep it cold by wrapping with a towel
• Set up the stand so that the clamp will hold a test tube directly over beaker
• When steam is released from the salt water solution, place the test tube of ice on the clamp (without towel!)
• Collect the condensation from the test tube with another test tube.

Conclusion:

The water evaporates from the sea (beaker) then forms clouds (steam) then condenses back to water again.

Notice the difference between the water from the beaker and the water from the test tube.
Try the next experiment as a follow up.

Comparing Fresh and Salt Water

Aim/Purpose:

To compare salt water, tap water and distilled water

Apparatus/Materials:

• salt water solution
• water from the previous experiment (distilled water)
• tap water
• silver nitrate solution

Method/Procedure:

• Place a small sample of each water into separate test tubes
• Add three drops of silver nitrate into each test tube
• Look at what had happenned and record results. Discuss the chemistry in that experiment.

Any questions must go to the webauthors.
This webpage is made for Thinkquest.
All materials are by the team Limnology: Facts and Fun

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