Explore matter, energy, chemistry and the physical laws that help explain everyday life. Choose an article below; its reading controls let you move between the available levels.
2,727 public articles · Page 51 of 57
Try Science Lab activities about forces and motion, light, sound and electricity or matter and chemistry.
A solenoid is a coil of wire. It looks like a long tube. When power flows through it, it makes a magnet. This magnet helps machines work. It can even help cameras take pictures. Do you want to see a magnet?
Early Reader · Change the reading level on the articleSome acids are hard like rocks. They do not melt in liquids. These solids help make new things. They help make fuel for cars. They can even help make power. It is like a tiny tool. Do you like tools?
Early Reader · Change the reading level on the articleSome gas can turn into ice. It must be very cold. This cold stuff helps tools work. It keeps things very chilly. It is a neat thing to see. Do you like the cold?
Early Reader · Change the reading level on the articleSome things are mixed well. Tiny bits join together. They stay in one piece. This makes something new. It can be very strong. Do you like to mix things?
Early Reader · Change the reading level on the articleScientists study hard things. They make new things. They use heat to change them. This helps us make tools. These tools help us every day. Do you like to build things?
Early Reader · Change the reading level on the articleThis is a special kind of light. It comes from a hard stone or glass. This light can help doctors. It can also help in science labs. It is very bright and strong. Do you like bright lights?
Early Reader · Change the reading level on the articleSome things can mix into water. This is called dissolving. It can happen with solids or gases. It helps us cook and clean. Do you like to mix things in water?
Early Reader · Change the reading level on the articleSome things can mix in water. Small bits pull away from a solid. Then the water wraps around them. This helps them move around. It is like a tiny hug. Does it mix in your cup?
Early Reader · Change the reading level on the articleSome liquids can melt things. They mix things together. This makes a new mix. Water is a great one. It helps us live. It is in our bodies. Do you like to mix things?
Early Reader · Change the reading level on the articleA sonic boom is a loud sound. It happens when planes fly very fast. The fast plane makes a big pop. It can sound like loud thunder. It can even shake windows. Have you ever heard a loud boom?
Early Reader · Change the reading level on the articleSound is made by air moving. It pushes on your ears. This push lets you hear things. It can be soft or loud. Can you hear the world around you? We use our ears to listen.
Early Reader · Change the reading level on the articleScientists use tiny balls to show shapes. These balls look like the small bits in a molecule. They use different colors for each bit. This helps us see the shape. It helps us see how things fit. Can you see the colors?
Early Reader · Change the reading level on the articleWe use maps to see things. These maps show where things go. They show time too. It helps us see how things move. It is like a path for a toy. Do you like maps?
Early Reader · Change the reading level on the articleSome things stay cool for a long time. Water is good at this. It takes a lot of heat to get warm. This helps us stay cool in the sun. Can you feel the warm sun?
Early Reader · Change the reading level on the articleThings make many kinds of sounds. Light can make many colors too. We can see how much of each part is there. This helps us know a sound or a color. It is very neat! Can you hear a sound?
Early Reader · Change the reading level on the articleStars give off much light. Scientists look at this light. It tells us about space. It helps us learn. We can see far away things. Do you like to look at stars?
Early Reader · Change the reading level on the articleLight has special colors. These colors tell us secrets. They act like tiny fingerprints. They show us what stars are made of. We can see far away things. This helps us learn. Do you like looking at the stars?
Early Reader · Change the reading level on the articleLenses help us see things. Some lenses are curved like a ball. These curves can make pictures look blurry. The light does not all meet in one spot. This makes the view soft. Can you see clearly through a lens?
Early Reader · Change the reading level on the articleTiny bits of stuff can spin. They do not spin like a top. They must spin two whole turns to look the same. This helps make everything we see. It is very strange! Can you imagine spinning that much?
Early Reader · Change the reading level on the articleTiny parts move in small circles. They also spin like tops. The spinning and moving work together. This helps make up how things are built. It is a big part of our world. Can you imagine tiny things spinning so fast?
Early Reader · Change the reading level on the articleTiny bits in our world act like magnets. They can spin in two ways. One way is up. One way is down. This helps us learn how they work. Can you imagine tiny magnets? They are very small!
Early Reader · Change the reading level on the articleTiny things can glow. They have extra energy inside. Then they let it go. This makes a tiny bit of light. It helps us see many things. Can you see the light?
Early Reader · Change the reading level on the articleSome things can turn into magnets. They do this on their own. This happens when they are not hot. Heat can make them stop being magnets. This helps us use tools. Do you have a magnet at home?
Early Reader · Change the reading level on the articleThings can change in a surprise way. A ball can sit on a hill. It might roll down to one side. Now it is not the same. This happens all on its own. It can happen in our world. Can you see things change?
Early Reader · Change the reading level on the articleBig stars make new things. They take small bits and make them bigger. This happens very slowly. It helps make the world around us. It is like magic in the sky. Can you look at the stars?
Early Reader · Change the reading level on the articleSome oils help keep skin soft. This oil is found in people. It is also in plants and animals. It helps the body stay healthy. It can even help some medicines work. Do you use oil on your skin?
Early Reader · Change the reading level on the articleTiny parts can move in a bond. They can stay far apart. This helps them stay safe. It is like a little dance. This way is best for them. Can you see how they move?
Early Reader · Change the reading level on the articleEverything is made of tiny bits. Some bits are heavy. Some bits are light. We find an average weight for them. This helps us learn about our world. Do you like to learn about tiny things?
Early Reader · Change the reading level on the articleSome metals help make power. This power can move through wires. It helps things work. We use it for many things. It is very cool to see. Do you like to see lights turn on?
Early Reader · Change the reading level on the articleEarth pulls on things. This pull is called gravity. It helps keep us on the ground. We use a set number for this pull. This helps us weigh things. It is a very steady pull. Do you feel the pull of Earth?
Early Reader · Change the reading level on the articleScientists use a special tool. It uses hydrogen gas. This tool helps us measure power. It is like a starting line for a race. We use it to compare things. Do you want to learn more?
Early Reader · Change the reading level on the articleClocks can show the same time. This helps trains run well. It helps us know when to meet. It makes life easy for you. Do you look at a clock?
Early Reader · Change the reading level on the articleWaves can stay in one place. They go up and down. They do not move away. This can happen in water. It can happen on a string. It looks like a wiggle that stays still. Do you see the wiggle?
Early Reader · Change the reading level on the articleStanton was a man who loved science. He studied how small parts of things work. He also looked for lights in the sky. He wanted to know if visitors came from space. Do you like to look at the stars?
Early Reader · Change the reading level on the articleTiny bits of stuff can change. An electric force can move them. This makes colors change. It can even split colors. This helps us see how things work. It is very cool! Can you see the colors change?
Early Reader · Change the reading level on the articleTiny bits of power hide on things. You can make them move by rubbing. Rubbing hair can make it stand up. It can even make a small spark. This power can make clothes stick together. Have you ever felt a tiny zap?
Early Reader · Change the reading level on the articleSome tiny things stay the same. They do not change over time. They stay in one spot. This helps them stay calm. It is like a quiet song. Can you be still like them?
Early Reader · Change the reading level on the articleSome things stay the same. Imagine a tub with water flowing in. The water flows out too. The water level does not change. This is a steady state. It stays calm and still. Can you think of something else that stays…
Early Reader · Change the reading level on the articleSteam comes from hot water. It looks like a white mist. It can move big machines. It even makes power for our lights. Steam helps us cook food. It can also clean things. Do you see steam when you boil water?
Early Reader · Change the reading level on the articleHot steam helps us find smells. It moves through plants. It carries the sweet oils away. This helps make perfume. We can smell it too. Can you smell a flower?
Early Reader · Change the reading level on the articleHot things give off light and heat. As things get hotter, they give off more. It happens very fast. This helps us know how hot the sun is. It is a big wonder! Can you feel the heat from a fire?
Early Reader · Change the reading level on the articleA blue light can glow in a storm. It looks like a small flame. It can show up on tall poles. It can even show up on planes. This light helps us know a storm is near. It is very pretty to see. Have you ever seen a…
Early Reader · Change the reading level on the articleSmall bits join to make long chains. They hold hands to stay together. First, they make tiny groups. Then, they make big groups. These groups make things like clothes. It is like a long human chain. Can you see the…
Early Reader · Change the reading level on the articleStephanie was a smart scientist. She found a way to make strong strings. These strings help keep people safe. They are used in vests. We use them every day. Do you like science too?
Early Reader · Change the reading level on the articleA man named Stephen Gray studied power. He found how it moves. He saw it travel through metal. It can move along a long string. This helps us use power today. Do you like to learn new things?
Early Reader · Change the reading level on the articleTiny things have special spots. These spots can change shape. They hold different parts. A small change makes a new shape. This helps us know how things work. Do you like shapes?
Early Reader · Change the reading level on the articleTiny things can have many shapes. They are made of the same parts. But the parts can face different ways. This is like your hands. They look the same but are not the same. Can you see the difference?
Early Reader · Change the reading level on the articleTiny parts of things take up space. They can bump into each other. This can slow things down. It can even change a shape. This helps keep things safe. Do you like to have your own space?
Early Reader · Change the reading level on the article