As part of our next attempt to make stalagmites and stalactites, we tried to get our salt-water solution to slowly drip out of a container. We poked a hole in the bottom of a plastic bottle. By screwing on the top of the container, we could slow the flow of the leak - as water leaked out, there was no opening for air to go in, causing the pressure to decrease inside the bottle, creating a vacuum. Jr. scientist A loved seeing the liquid go faster or slower out the hole in the bottom as we unscrewed the cap and screwed it back on. A big hit!
No comments:
Post a Comment