Projects for the School About H2O
Pitcher of Mini H2O Molecules
- This project might seem obvious, but some slight modifications can make it original and captivating. An H2O molecule contains two hydrogen atoms and one oxygen. To make your pitcher of H2O, get two bags of mini-marshmallows -- one red, one blue -- and a bag of pretzel sticks. To assemble your H2O molecules, make a V-formation, with one blue marshmallow at the base (oxygen), connected via pretzel sticks to two red marshmallows (hydrogen). Do this repeatedly, and put the H2O molecules into a pitcher. As you demonstrate your project, pour the "water" into glasses for your classmates to sample. You will have shown that a pitcher of water is actually a collection of molecules (and can be delicious).
Homemade Water Cycle
- This project allows you to demonstrate the water cycle: evaporation, condensation and precipitation. Take a large mixing bowl and place a small empty plastic container in the middle of the bowl. Put about 1 inch of water in the bowl. (Make sure that none gets into the plastic container.) Cover the bowl in plastic wrap and secure it with an elastic band. Place the bowl in sunlight (a windowsill will work) and check it every few days. Notice how the water condenses onto the wrap and will eventually fall into the plastic container. Measure how much precipitation you observe each day.
Calculating the Amount of Water in an Orange
- This project will allow you to show how present H2O is in just about everything we eat. Cut an orange into thin slices. Take a large square of aluminum foil and lay the oranges on it. Weigh this on an electronic scale and record the measurement. Dry the orange slices by placing them on a sheet of paper towel. Direct a fan onto the orange slices and leave it there for a few hours. Once the oranges are dry, weigh them again on the paper towel. The difference between the two measurements will tell you the amount of water in an orange.
Changing the Boiling Point of Water with Salt
- This project will allow you to demonstrate that the boiling point of H2O can be manipulated -- showing that although there are natural constants when it comes to natural substances, human beings can use science to overcome them. Start by boiling 2 cups of water on a stove. Measure the temperature with a thermometer when it starts to boil. Begin to boil 2 cups of water in a different pot and add 1 tablespoon of regular salt. Use the thermometer again to measure the temperature when it boils. Try different amounts of salt and see what the results are. Record these results on a graph.