Experiment 1: Stalactites and Stalagmites
If you remember last year's Cave, you will also remember the infamous Stalactite and Stalagmite Growing Fail. If you don't, let me give you the short version: the experiment didn't work. I decided that this summer, I WOULD grow stalactites and stalagmites, no matter what!
Here's our set up:
Two cups, one filled with Epsom Salt that had been dissolved in water, with a string stretched between them. The desired outcome: stalactites and stalagmites growing from the string!
I waited. I waited. I waited.
Nothing. Once again, I was defeated.
I will never attempt this experiment again.
Experiment 2: WASH YOUR HANDS!!!
This next experiment was done by Cassie and our Tweens during a Tween Wednesday program. They were talking about germs and why we should wash our hands. For the experiment, they had two pieces of an apple. For Apple A, as soon as they cut the piece from the apple, they sealed it up in a plastic bag. For Apple B, they passed the slice around the group, making sure everyone had a chance to hold the apple (it even briefly hit the floor!), before placing it in a plastic bag. They left the apples to sit to see what happened over a few days.
Remember, Apple A is the "clean" apple and Apple B is the one that was passed around the group.
Do you need to wash your hands now?
Experiment 3: The Bouncing Egg
Yes, you can make an egg bounce! I placed a regular egg in a bowl, covered it with vinegar, and let it hang out for 24 hours.
Ok, so not much to see. After 24 hours, I took the egg out of the vinegar and the shell was gone! The egg also felt a little swollen and it felt SUPER GROSS!!! But would it bounce?
IF I had followed the instructions and dropped the egg from a height of 3 inches or less, I'm sure it would have bounced. Good thing I did this over the sink!