Friction Experiment We can pick up rice grains using a pair of chopsticks. But can you pick up a bottle of thousands of rice grains using only one chopstick? Why When you first fill the bottle with rice, there is a little bit of space, i.e. an air pocket, in between each grain and its neighbors. As…
8th Grade Science Projects
The Best Homemade Lava Lamp | Density Experiment
Why Alka Seltzer tablets contain 3 ingredients: aspirin (pain killer), sodium bicarbonate and citric acid. When dropped into water, sodium bicarbonate and citric acid combine to form sodium citrate, carbon dioxide, and water. This sodium citrate can neutralize stomach acid and this is why alka-seltzer is an antacid medicine. During this process, carbon dioxide is created….
Build A Paddle Boat | STEM For Kids (Video)
Water science experiment is always a hit for kids. Building a paddle boat is so easy and so much fun. Just use things you probably already have around the house. Let’s get started. You have just built a paddle boat! In a real paddle boat, the spinning drum of paddle boards acts as oars, pushing against…
Cartesian Diver Experiment (Video)
How do fish float and sink? Here is a simple Cartesian Diver experiment (diving ketchup experiment) to show you how. Why This classic experiment is called Cartesian Diver, named after French scientist, mathematician and philosopher scientist, René Descartes. It demonstrates the principles of buoyancy and density and explains how fish dive or rise in water. Buoyancy: the force of buoyancy on an…
Do Grapes Sink Or Float? | Salt Water Density Experiment
Do grapes sink or float? In the picture above, you can see that grapes can both sink and float. Why is that? What determines if an object sink or float in water? Try this experiment to learn about water density. What you need some grapes 2 clear glasses tap water salt stirrer Steps Fill the two glasses…
Build Marble Roller Coaster | STEM
If you (or your parents) have a roll of unused baby edge guard lying around, this is the perfect STEM activity for you. Have you ever wondered why the string of roller coaster cars is pulled up to the crest of the tallest point on the roller coaster before rolling downhill to the loop? Have you ever wondered why…
What Makes Ice Melt Faster? Salt Melts Ice Experiment
Here is a quick and easy ice fishing experiment. It is so cool (pun intended) that you will want to do it again and again (I did!) Here is a fun experiment illustrating the concept of water freezing point Why Salt reduces the freezing point of water, causing the ice to melt faster. When a…