Dear readers,
Lets get creative today and bring innovation in our World Water Day week by making a craft to understand how the balance of water on the Earth is maintained and is still constant after it is repeatedly lost and gained again and again.
So, have fun while you learn!!
Keep smiling,
-the Editor
This simple model represents the cycle of water from the ocean to the atmosphere and down again. You'll need two half gallon jars, a rock, masking tape and food coloring.
- Pour about 1.5 inches of water into one of the half gallon jars. Add a few drops of food coloring. This water represents the ocean.
- Put the rock in the middle of the jar. Some of the rock should stick up out of the water. This rock represents land.
- Invert the second jar and place it over the first jar. Tape the two jars together.
- Place the model in a sunny windowsill and observe.
The colored water in the bottom of the jar is heated by the sun. Some of this water receives enough energy to evaporate into water vapor (particles of pure water too small to be seen). The water vapor rises up in the warm air. When the water vapor comes close to the cooler sides of the jar it cools and condenses onto the jar. As more water vapor condenses onto the jar, droplets form and eventually grow big enough to precipitate down to the bottom. The droplets that condense out onto the sides of the jar are not colored like the water in the bottom of the jar. The larger food coloring particles are left behind just as salt and pollutants are left behind when water evaporates from oceans. You can build another simple model of the water cycle using a zip lock
baggie.
