Before the invention of the clock, people determined time by the length of the shadow. What are shadows? How are shadows formed? A shadow represents an absence of light. When an object blocks the passage of light, the other side of that object will get less light, forming a dark shape of the object behind …
Colors make our world bright and cheerful. Colors are everywhere: green in leaves, blue in our sky, and brown in soil. Animals use colors to attract mates (peacocks) or warn away their predators (frogs). For us, a world without colors is unimaginable. But how do we see colors? Table of Contents The word “color” reminds …
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Law of ‘Conservation of Energy’ explained with real life examples. Law of ‘Conservation of energy’ is applicable in our daily life as we convert one form of energy to another to do work. Let us start by understanding work and energy. Both living and non-living things do work. A cat runs behind a mouse; a bus …
What causes surface tension in water ? Have you ever tried to make a bubble bath in plain water? That would be just a bubble-free bath! In order to make bubbles in a liquid, you have to be able to “stretch” its surface to trap a gas (like air) inside. When you blow up a …
A typical hurricane begins all the way in Africa. At the edge of the Sahara desert, hot, dry air meets the cool, wet air over the coastal forest. These air masses are so different from each other that they make wind where they meet. The wind blows to the east and is called the African …
Have you ever thought of how everyday phenomena happen, such as small balls rolling faster than large balls? Why do you fall in the forward direction when a car stops suddenly? Or why does a rolling ball stop when it hits a wall? The answer to all these questions is hidden in Newton’s three laws …
When you imagine the colors of the polar regions, what picture first comes to your mind? Probably thick layers of white ice extending as far as your eyes can see, right? With the temperatures reaching far below zero and the sun not shining for months in the winter, it is easy to think that the …
Your child belongs to a generation born into advanced technology. Compared to those of us who had to live with dial-up connections and CDs before eventually entering the era of the Netflix and Amazons of this world, they will be growing up around even faster and more advanced technologies that have endless possibilities. So if …
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Many people think snow is one of the best parts of winter. It gives us the chance to ski and sled, or even have the occasional snowball fight. But snow around the world can be a source of more than just fun – it can be the primary source of water. Think of mountain snowpacks …
Cloud Seeding Could Provide More Snow as Winters Get Warmer Read More »
Virtual Reality If you love science fiction or video games, you may already know about “virtual reality,” or VR. With virtual reality, you can jump to the other side of the planet in an instant, experience what it’s like to fly, and even explore pretend worlds. In a virtual world, you could go surfing with …
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