This Dynamic Earth: The Story of Plate Tectonics
Usborne: "The Great Underwater Search" ($8.95)
Create a mural with each ocean level on the wall, or use
large posterboard taped together (on the back) for a 'less
than permanent" mural!
Odyssey in Egypt
Australia
Weather Classroom
Tornado in a Bottle
Materials :
a bottle with a lid (a one-quart canning jar works well)
Your students will be fascinated by this "tornado in a bottle." A tornado is
a vortex. A vortex is a spiral motion of a fluid; in a tornado, the fluid is
air. In this activity, the fluid is water with salt, and detergent is added
to make it more visible. If young children are going to handle this tornado
model, consider using a plastic bottle.
1. Fill the bottle with water to one inch (3 cm) from the top.
2. Add the teaspoon of salt, and shake the bottle until the salt is
dissolved.
3. Add a drop of dish washing detergent. (A drop of food color will add color
to the model.)
4. To see the vortex (tornado), put the lid on tightly and move the bottle in
a swirling motion.
5. To demonstrate the destructive potential of tornadoes place small plastic
objects in the bottle and swirl. (Note: Using tiny houses from a popular
board game is especially fun for students.) Observe what happens to the
objects.
Links and Books on Explorers
"The Boy Who Sailed Around the World Alone"
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