Put the straw in the bottle, but do not let it MAKE A touch the bottom. THERMOMETER Use the modeling clay to seal the neck of the bottle, so the straw stays in place. (Make sure the straw does not touch the bottom of the bottle.) MATERIALS: Hold your hands on the bottom of the bottle clear, plastic bottle (11oz. water and watch the mixture move up through the bottle works) straw. water EXPLANATION: rubbing alcohol Why does this happen? Just like any clear plastic drinking straw thermometer, the mixture expanded when it modeling clay was warmed. This made the mixture no food coloring longer fit in the bottom of the bottle. As PROCESS: the alcohol expanded, the colored mixture Fill about 1/4 of the bottle full with equal moved up through the straw. If they bottle parts of water and rubbing alcohol. were to get extremely hot, the mixture Add a few drops of food coloring. would have come up through the top of the straw Place the wire into the top end of the sleeve. MAKE A WINDSOCK Take the needle and thread and stitch it, so the wire will stay in place. You have just now made the mouth of the MATERIALS: windsock. Now, place the rock in some cloth on one sleeve of a large, old long-sleeved edge of the wire. Sew it on tight to hold it in shirt place. needle and thread Tie the string onto the wire opposite the string rock. wire Tie the other end of the string to a branch where it can move freely. The rock will keep small rock PROCESS: the windsock facing into the wind. EXPLANATION: Cut one sleeve off an old long-sleeved shirt. Bend the wire into a circle. Make sure it is Now, your windsock is working! Use a the same size as the top of the sleeve. compass to find out from which direction the wind is blowing.
MAKE A THERMOMETER MATERIALS: clear, plastic bottle (11oz. water bottle works) water rubbing alcohol clear plastic drinking straw modeling clay food coloring PROCESS: Fill about 1/4 of the bottle full with equal parts of water and rubbing alcohol. Add a few drops of food coloring. Put the straw in the bottle, but do not let it touch the bottom. Use the modeling clay to seal the neck of the bottle, so the straw stays in place. (Make sure the straw does not touch the bottom of the bottle.) Hold your hands on the bottom of the bottle and watch the mixture move up through the straw. EXPLANATION: Why does this happen? Just like any thermometer, the mixture expanded when it was warmed. This made the mixture no longer fit in the bottom of the bottle. As the alcohol expanded, the colored mixture moved up through the straw. If they bottle were to get extremely hot, the mixture would have come up through the top of the straw MAKE A WINDSOCK MATERIALS: sleeve of a large, old long-sleeved shirt needle and thread string wire small rock PROCESS: Cut one sleeve off an old long-sleeved shirt. Bend the wire into a circle. Make sure it is the same size as the top of the sleeve. Place the wire into the top end of the sleeve. Take the needle and thread and stitch it, so the wire will stay in place. You have just now made the mouth of the windsock. Now, place the rock in some cloth on one edge of the wire. Sew it on tight to hold it in place. Tie the string onto the wire opposite the rock. Tie the other end of the string to a branch where it can move freely. The rock will keep the windsock facing into the wind. EXPLANATION: Now, your windsock is working! Use a compass to find out from which direction the wind is blowing.
The-Wonderful-World-of-Weather.docx