Nowadays, we have clocks and watches that tell us when to wake up and leave for work. Before the invention of clocks, how did people tell what time it was? Sundials have a long history of being used to tell time. As far back as 1500 B.C., ancient Egyptians used a sundial or “shadow clock”. …
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 …
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 …
One day, my 4-year-old daughter asked, “What is science?” “Well, remember you always ask me Why — ? Why is the sky blue? Why is sunset orange? Why are bubbles round?” I answered. “Science helps us find out answers to these whys!” My daughter’s question came at the perfect time when I received the new …
Surface tension is the glue that binds water into a cohesive sphere and the force that makes water bead up on a surface. It is one of the amazing properties of water. Surface tension in water is created by the attractive forces between the water molecules It can be broken up. In this experiment, we …
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 …
Water science experiment is always a hit for the kids. One of the coolest summer activities for kids is building a paddle boat. Building a paddle boat is so easy and so much fun. The boat makes a great toy. You can use it on a pond, in a pool or even in a bathtub. …
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 …
Have you ever wondered why water sticks to your skin? When you jump into a ball pool and come out, none of the balls will be stuck on you. However, when you come out of a pool full of water, all the water doesn’t leave your skin immediately. Instead, it drips and you stay wet …
Iron is an essential mineral to our body. It is found in every cell and is used to make hemoglobin, the substance in red blood cells that carries oxygen from your lungs to transport it throughout your body. If we don’t have enough iron, our body will show symptoms including lack of energy, shortness of breath, headache, …
Did you know that water can play tricks on your eyes? This experiment is incredibly simple and requires only a glass, water and a coin of your choice. It demonstrates a special property of water, called light refraction. If you put a coin inside a glass of water, you will be able to see that …
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 …
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 …
Toothpicks are made of dry wood. Using the absorbing property of wood and the surface tension property of water, you can create a fun trick to impress your kids (or friends). In this simple experiment, we will turn broken toothpicks into an expanding star. Before you start, be sure to watch the video below. The …
Refraction Of Light Have you ever noticed if you look through a glass of water, the image behind the glass sometimes looks funny or distorted? It’s like the glass of water is playing tricks on your eyes. The trick is actually created by the refraction of light. Light travels at different speed through different materials. …
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 another1. This bending by …
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, …
Do you know that flowers can drink up water and change their own colors into the color of the water they drink? Flowers and plants drink water through their roots. In cut flowers, since there are no roots, water travels from the cut directly into the stems and travels to the petals and other parts …
How Are Rainbows Formed? Sunlight or white light is a mixture of all the rainbow colors. The different rainbow colors are essentially mixed together to result in a white color. You may wonder why when you mix all the different colors of paint together result in black instead of light. That is because light mixing …
What Is Water Cycle? Water cycle is also known as hydrologic cycle or hydrological cycle. It describes how water moves continuously on Earth. Water loops through different stages – evaporation, condensation, precipitation and flow. It then goes back to the evaporation stage. The whole cycle starts all over again and hence the name “water cycle”. Water Cycle …