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Tornado in a Glass

Tornados can be devastating. It can destroy large buildings, rip roofs off of houses, uproot trees, drive sticks into trees and hurl cars hundreds of yards away. They can even pick you up and literally drop you somewhere else. A tornado, also called twister or cyclone, is a violent rotating column of air extending between the Earth’s surface and …

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Scientific Method Worksheet, Template & Example

Table of Contents What Is The Scientific Method? Scientific Method Steps Scientific Method Examples – Zoey and Sassafras Download Scientific Method Worksheet What Is The Scientific Method? The scientific method is a systematic way of studying the world in a scientific manner. It allows scientists to minimize errors and increase confidence in the results of …

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Static Electricity and Water

Here is a simple physics experiment using a property called static electricity.  Every object is made up of small particles called atoms. These particles are extremely small and you cannot see them without a microscope. There are two types of charges in every atom — positive change(s) and negative charge(s). Only negative charges are free …

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Make A Square Bubble

Water molecules (and also liquid soap and glycerin molecules) tend to stick to themselves. This cohesive force creates surface tension. (Note: Water by itself doesn’t form long lasting bubbles because a thin layer of water molecules evaporates too fast. By adding soap and glycerin, the “skin” of the bubble is more stretchy and water is …

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Hovercraft & Friction Experiment

Friction is the force created when two objects move across each other to oppose the movement.  An object gliding on the floor stops because of friction. When friction is reduced, a gliding object moves faster, farther and for longer. This balloon hovercraft can fly across the floor because air has less friction than the floor. When …

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Cartesian Diver Experiment (Video)

How do fish float and sink? 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 object is equal to the weight of the water displaced by that object. Density: if an object …

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How Are Ocean Currents Formed | Water Convection Experiment

How Are Ocean Currents Formed Ocean currents are formed in several ways. They can be created by wind, by gravity, by events such as earthquakes. They can also be made by density differences in the water. Density in the water changes when temperature or salinity varies. In this experiment, we will investigate how temperature can affect …

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How Many Drops of Water Can Fit on a Penny Surface Tension Experiment

Surface tension is a force that pulls together the outermost molecules of a liquid. It makes water form tiny beads on a leaf and hold a raindrop in the air. It is also why bubbles can form and then burst. Here’s a STEM challenge. This challenge is to see how many drops of water will …

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How To Keep Crackers Dry Underwater | STEM Challenge

Air can exert pressure on other objects. That force is called the air pressure. After shaking a soda can and open it, the soda explodes. That’s air pressure at work. But you don’t have to use a can of soda to see how air pressure works. There are other, less messy ways. In this air …

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Thunderstorm Convection Experiment (Video)

Even though there is a severe drought in the area where we live, thunderstorms are still a common spring occurrence. I have shown my kid how rain was created before. Now she’s curious how thunderstorms form and what causes them. So what is a thunderstorm? A thunderstorms is a storm with lightnings and thunders. What causes …

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Refraction of Light in Water Experiment (Video)

Have you noticed that things look a little funny when you see them through a glass of water?  Some of the aberrations are caused by the imperfection in the glass production. But there is more to it. Refraction is the bending of light as it passes from one transparent medium into another​1​.  This bending by …

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Balloon Rocket Car Race | Propulsion STEM Activity

Propulsion And Newton’s Third Law How do airplanes fly in the sky, ships move in the water and rockets take off into the space? These movements all have one thing in common — thrust. Newton’s Third Law of action and reaction states that for every action, there is an equal and opposition reaction. For every force, …

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