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 48 of 57
Try Science Lab activities about forces and motion, light, sound and electricity or matter and chemistry.
Parts of a tiny thing can move. One part jumps to a new spot. It stays in the same small group. This helps make things like nylon. It is like moving a toy to a new chair. Can you see how it moves?
Early Reader · Change the reading level on the articleTiny bits make up solids. These bits sit in a pattern. We use math to see this pattern. It helps us study waves. This is very cool. Do you like patterns?
Early Reader · Change the reading level on the articleWe can make things clean. First, we melt a mix in liquid. Then we let it cool down. Tiny, clean shapes grow. These are called crystals. They help us find pure things. Do you like shiny crystals?
Early Reader · Change the reading level on the articlePeople use math to study gas. This math helps us know how gas moves. It looks at heat and space. It helps us understand how things work. It is very smart math. Do you like to learn about gas?
Early Reader · Change the reading level on the articleSome liquids can change color. They change when they meet something new. This helps us see what is happening. It is like a magic trick. We can use them in science. Can you see a color change?
Early Reader · Change the reading level on the articleTwo things can move together. They pull on each other. We can pretend they are one thing. This helps us see how they move. It makes math easy. Do you like to solve puzzles?
Early Reader · Change the reading level on the articleSome things like to give. They give tiny bits to others. This helps make a change. It can even make metal rust. It is a busy job! Can you find things that change?
Early Reader · Change the reading level on the articleTiny bits move between things. These bits are very small. They can jump from one thing to another. This helps things change. It is how some tiny living things live. Can you find these tiny bits?
Early Reader · Change the reading level on the articleWaves move through things like light or sound. Sometimes a wave hits a new spot. It might bounce back. This bounce is called a reflection. It helps us see things. Can you see a reflection in a mirror?
Early Reader · Change the reading level on the articleTiny bits make up everything. We call them atoms. Each atom has a tiny weight. Some atoms are a bit heavier. Some are a bit lighter. This helps us know how things work. Can you find tiny things?
Early Reader · Change the reading level on the articleSome things float in water. Some things sink. We can use water to test this. An ice cube floats on top. A heavy rock will sink down. This helps us learn about things. Do you like to play in water?
Early Reader · Change the reading level on the articleThings move in many ways. A man walks on a train. The train moves fast. His walk makes him go even faster. This helps us see how things move. Can you see how fast you go?
Early Reader · Change the reading level on the articleLight can change when things move. It can look different. This happens if things move fast. It helps us see space. Do you like looking at stars?
Early Reader · Change the reading level on the articleBig machines crash tiny things. These tiny things move very fast. They hit each other hard. This makes things very hot. It helps us learn about the start of everything. Can you imagine something that hot?
Early Reader · Change the reading level on the articleTiny things move very fast. They can zoom like light. We use math to see them. This helps us learn about space. It is a big puzzle. Do you like big puzzles?
Early Reader · Change the reading level on the articleTime can look different for everyone. Two things can happen at once for you. But they might happen at different times for a friend in a fast train. It all depends on how you move. Does that sound strange? Can you…
Early Reader · Change the reading level on the articleTiny bits move in a cloud. This cloud changes how they act. It can make numbers too big. We fix the numbers to match what we see. This helps us understand the world. Can you imagine a tiny cloud?
Early Reader · Change the reading level on the articleSome tiny things are hard to draw. They look like a mix of two shapes. They are not one or the other. They are a blend of both. This makes them very strong. Can you see the mix?
Early Reader · Change the reading level on the articleSome things want to go back. A spring pulls back to its shape. It does not like to stay stretched. This helps things stay the same. It is like a rubber band. Can you find a spring?
Early Reader · Change the reading level on the articleMany pushes can act on one thing. All these pushes can act like one big push. This one push does the same work. It helps us see how things move. It is like one big hand helping you. Can you feel a big push?
Early Reader · Change the reading level on the articleLight takes time to move. It travels from one place to another. It does not move fast enough to be instant. This means we see things a little late. It is like a delay. Can you see the delay?
Early Reader · Change the reading level on the articleScientists can work backward. They start with a big thing. Then they break it into small parts. They do this to make a plan. This helps them build new things. Can you think of a plan?
Early Reader · Change the reading level on the articleSome things can go back and forth. You can change them slowly. It is like ice melting in water. This helps us learn about heat. It is a very neat way to work. Can you think of something that goes back and forth?
Early Reader · Change the reading level on the articleSome things can change back. One thing can turn into another. Then it turns back again. It is like a two-way street. This helps things stay in balance. Can you think of something that changes back?
Early Reader · Change the reading level on the articleSome things spin in a circle. A wheel can spin fast. A clock hand spins slow. We count how fast they go. This helps us know how things work. It is fun to watch. How fast can you spin?
Early Reader · Change the reading level on the articleSome things flow fast. Some things flow slow. This name helps us measure that. It tells us how thick a liquid is. It helps us learn about liquids. Do you like thick syrup?
Early Reader · Change the reading level on the articleYour eyes see many colors. They use red, green, and blue. These colors mix to make more. Screens use these colors too. This helps us see pictures. It is very cool! Do you like bright colors?
Early Reader · Change the reading level on the articleSome things flow like water. Other things stay still like a rock. Some things do both! Ketchup is a good example. It flows when you shake it. This helps us make food and paint. Do you like ketchup on your food?
Early Reader · Change the reading level on the articleThis is a tiny sugar. It is in your body. It helps make your tiny parts work. It is very important for life. We need it to stay well. Do you want to learn more?
Early Reader · Change the reading level on the articleRichard Taylor was a smart man. He studied how tiny things work. He found out what makes up small parts of our world. This work won him a big prize. He helped us learn so much. Do you like to learn new things?
Early Reader · Change the reading level on the articleYou can use your hand to learn. Use your right hand. Curl your fingers. Point your thumb up. This helps you find a way. It shows how things move. It helps us see science. Can you try it too?
Early Reader · Change the reading level on the articleSome things do not change shape. They stay the same when you push them. The parts stay in the same place. This helps us know how they move. It is fun to watch things move! Can you find something hard that stays the…
Early Reader · Change the reading level on the articleSome things do not bend. These are called rigid bodies. They can move or spin. They can also slide around. We can study how they move. It helps us build machines. Can you find something rigid?
Early Reader · Change the reading level on the articleSome things like to spin. A toy top is one. Tiny bits of stuff also spin. This helps us learn how they move. It is very fun to watch. Can you spin a top?
Early Reader · Change the reading level on the articleSmall rings can change shape. They move and twist around. Some rings look like chairs. This helps them stay safe. It is like a little dance. Can you see the change?
Early Reader · Change the reading level on the articleSmall shapes can join together. They look like little rings. These rings open up to make a long chain. These chains make things like nylon. This helps us make many things. Do you like wearing nylon?
Early Reader · Change the reading level on the articleRobert is a man who studies science. He works at a big school. He won a very special prize. This prize shows he is a great thinker. He helps us learn about the world. Do you like to learn new things?
Early Reader · Change the reading level on the articleRobert Bunsen was a scientist. He worked in a lab. He found new things in nature. He even made a special tool for fire. His work helps us learn. Do you like to learn new things?
Early Reader · Change the reading level on the articleRobert was a smart man. He studied how things work. He looked at very cold liquids. He won a big prize for his work. This prize is called a Nobel Prize. It is a very special honor. Do you like to learn new things?
Early Reader · Change the reading level on the articleRobert was a smart man. He studied how tiny things work. He won a big prize for his work. He helped us learn about the world. His work helps us today. Do you like to learn new things?
Early Reader · Change the reading level on the articleRobert Mulliken loved science. He studied how tiny bits of things fit together. He learned a lot about how small parts work. This helped him win a big prize. He was a very smart man. Do you like to learn new things?
Early Reader · Change the reading level on the articleThis is a special thing made in a lab. It is very hard to make. It does not stay for long. It is named after a man who found X-rays. It is a tiny, tiny thing. Can you find it?
Early Reader · Change the reading level on the articleA man found a new light. It was called an X-ray. We use a name to measure it. That name is the roentgen. It helps us stay safe. Do you want to learn more?
Early Reader · Change the reading level on the articleA man named Roger loved stars. He looked at the sky. He saw that the Moon has no air. This helped us learn about space. He was very smart. Do you like to look at stars?
Early Reader · Change the reading level on the articleRoland was a brave leader. He lived a long time ago. He helped protect his land. People still tell stories about him. These stories make him a hero. Do you like hero stories?
Early Reader · Change the reading level on the articleRolf Sievert was a smart man. He studied tiny bits of light energy. This work helps keep people safe. Now, we use his name for a tool. It helps us measure that energy. Do you like to learn new things?
Early Reader · Change the reading level on the articleA wheel moves in a special way. It turns and moves forward at once. This is called rolling. It is easier to roll than to slide. Rolling helps cars and trains move. Do you like to roll a ball?
Early Reader · Change the reading level on the articleWheels can slow down. This happens when a wheel hits the ground. The ground or the wheel can change shape. This makes it hard to roll. It can even make things warm. Do you like to roll?
Early Reader · Change the reading level on the article