Water and Weather Experiments
Submitted by Christy in Wilmington, Delaware
Homeschool Parent, Grades K through 8
For water week we did a different water based science project per day.
Monday - Rain/condensation: Get a teapot of boiling water, and let the steam go up into a plastic bottle. The bottle will first 'cloud' then it will 'rain' in the bottle!
Tuesday- Tracking the rate that ice melts: We wrapped ice in a cloth, aluminum foil, a plastic bag, in water, and just in a bowl. Have the children make a hypothesis on which one will take the longest to melt. You will be very surprised at the out come.
Wednesday- Float or sink: Fill a large bin or bucket with water to see what sinks or floats. Let the children guess what will sink or float, chart the results.( the biggest kicker is fruit with and without the rind!)
Thursday- Oceans in a bottle: will water float or sink? (I am giving away a secret that many have tried to get from me by the way!) color water with blue food coloring. in individual bottles or babyfood jars and sand (not required) and BABY OIL. Slowly pour in the blue water. will it float on the oil?
Friday- Tasting: we tasted different types of water. We tried to disolve things in to hot or cold water and tasted it ( koolaid, sugar, salt, iced tea mix, and coca coca.) Very fun!
Air Pressure Demonstration (Be careful!)
Submitted by Rob in Tucaloosa, Alabama
Third Grade Teacher
I demonstrate air preasure to my students by using a half full 20 ounce water bottle and dry ice. I make sure all students are far enough away, there will be an explosion, and I open the lid of the water bottle and place 2 pieces of dry ice in and quickly seal the bottle.
I place the bottle back on the ground and get away. In about 30 seconds the bottle will EXPLODE, this sounds like a bomb going off. I then show my students a bottle with the same amount of water in it as the bottle I blew up and have them squeeze it.
We discuss how the dry ice gives off a gas that builds up inside the sealed bottle until it explodes. This lesson is always a blast with the kids.
Webmaster note: Thanks for submitting these, Christy and Rob!