What does this project explore? You can learn about a tree’s growth and history by observing its rings. Scientists have been able to use the information from the sizes and spacing of tree rings to identify climate change. These studies can also identify trees that are suffering from the early stages of pollution effects or can identify an area that is not getting enough irrigation. Past climate conditions can be discovered and future climate patterns can be predicted from the study of tree rings.
Make a slow-drip watering system. Most plants like their roots to be damp, but not muddy. This experiment is perfect for observing how plants absorb the nutrients they need to thrive. Check out the rest of these 12 Gardener challenges.
Charlie and his friends are going outside to investigate some awesome sports stuff! In this episode they figure out the secret to throwing a curveball, a crazy swooping baseball pitch. Turns out it’s all about physics! Spin the ball the right way and boom, you have a major league caliber pitch … it’s that easy.
In this episode, Charlie teaches us how we can take a lousy topic like mowing a lawn, and turn it into a spectacular art form. Don’t have a lawn mower? A board, some string, and a hose will get the job done too! We also get to see Charlie and his friends play probably the biggest game of tic-tac-toe ever. It’s enormous.