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 12 of 57
Rhodium is a special metal. It looks like shiny silver. It is very hard to find. We use it to make jewelry look bright. It also helps cars stay clean. It is a very rare treasure. Do you like shiny things?
Early Reader · Change the reading level on the articleRichard Feynman loved to learn. He was a great scientist. He studied how tiny things work. He used drawings to show his ideas. He liked to ask many questions. Do you like to ask questions too?
Early Reader · Change the reading level on the articleRobert Boyle was a man who loved science. He liked to do tests to learn things. He used a pump to study air. This helped him learn how the world works. He was a very smart man. Do you like to learn new things too?
Early Reader · Change the reading level on the articleRobert was a great scientist. He studied how things are made. He made many things in his lab. This helped people stay well. He won a big prize. Do you like to learn new things?
Early Reader · Change the reading level on the articleRobert Hooke was a smart man. He looked at tiny things. He used a tool to see them. This tool helped him learn. He also looked at the stars. He was a great thinker. Do you like to look at tiny things?
Early Reader · Change the reading level on the articleRobert Millikan was a smart man. He studied how tiny things work. He learned about the power in electricity. This work helped many people. He even won a big prize. Do you like to learn new things?
Early Reader · Change the reading level on the articleThings can spin in a circle. Some things spin around their own middle. This is called a spin. Other things move in a big circle around something else. This is called an orbit. Can you see things spin?
Early Reader · Change the reading level on the articleRubidium is a soft metal. It is a light grey color. It can burn in the air. It can even pop in water! This metal helps us learn about science. Do you like to learn about metals?
Early Reader · Change the reading level on the articleRuthenium is a rare metal. It is very hard. It does not change easily. We use it in parts for tools. It helps make things strong. Do you like metals?
Early Reader · Change the reading level on the articleTiny bits make up everything. Scientists shot tiny bits at gold. Most bits went straight through. Some bits hit a small center. This center is called a nucleus. It is very strong. It helps us know how things work. Do…
Early Reader · Change the reading level on the articleSalt is made of tiny bits. These bits stick together. They form hard shapes. Some salt comes from salty water. It stays behind when water goes away. Do you like salt on your food?
Early Reader · Change the reading level on the articleSamarium is a shiny metal. It looks like silver. It can help make magnets. It can also help doctors treat some sicknesses. It is a very special thing. Do you want to learn more?
Early Reader · Change the reading level on the articleSatyendra Nath Bose was a smart man. He loved to study how things work. He found new ways to look at tiny bits of our world. His work helps us learn more. Do you like to learn new things?
Early Reader · Change the reading level on the articleScandium is a shiny metal. It looks like silver. It is very strong. We use it to make light metal parts for planes. It can even help make sports gear! Do you like to play sports?
Early Reader · Change the reading level on the articleLight can bounce off things. It does not always go straight. It can hit small bits. Then the light moves a new way. This helps us see the world. Can you see light bounce?
Early Reader · Change the reading level on the articleSmall things move in a new way. They act like waves. This helps us see where they go. It helps us learn about the world. It is very neat! Do you want to see more?
Early Reader · Change the reading level on the articleScientists watch how things work. They see things happen many times. They find rules for the world. These rules help us know what comes next. We can use them to learn. Do you like to find rules?
Early Reader · Change the reading level on the articleScientists make small versions of things. These help us learn. They make big things easy to see. It helps us see how things work. We can study them safely. Can you make a model too?
Early Reader · Change the reading level on the articleScience helps us learn. It uses ideas to explain things. We test these ideas many times. This helps us know they are true. These ideas help us make new things. Do you like to learn new things?
Early Reader · Change the reading level on the articleA second is a tiny bit of time. It helps us know when things happen. It is very fast. You can hear it tick on a clock. It helps us stay on time. Can you count to one second?
Early Reader · Change the reading level on the articleSome things are named after the moon. This is one of them. It can look like red powder. It can also look like gray metal. It helps make glass and colors. Do you like looking at the moon?
Early Reader · Change the reading level on the articleElectricity moves through things. Some things let it flow well. This name helps us measure that flow. It is named after a man. It helps us use tools. Can you feel a spark?
Early Reader · Change the reading level on the articleScientists use a special way to measure radiation. It helps keep our bodies safe. This measure tells us how radiation might affect us. It is very helpful for doctors. We use it to stay healthy. Do you want to learn more?
Early Reader · Change the reading level on the articleMany rocks are made of silicates. These are found in the ground. They can make glass and cement. They help us build big things. These parts of the Earth are strong. Can you find a rock today?
Early Reader · Change the reading level on the articleSilicone is a very useful stuff. It can be like oil or soft rubber. It helps keep water out of homes. We use it in many kitchen tools too. It is very helpful for us. Do you use it at home?
Early Reader · Change the reading level on the articleSome things move back and forth. A spring can do this. It pulls a weight to the middle. Then the weight moves past the middle. It goes back and forth again. This can go on and on. Can you find something that swings?
Early Reader · Change the reading level on the articleA siphon moves water through a tube. It can move water up and over. It does not need a pump. Gravity pulls the water down the long side. This helps the water move. It is very cool to see! Can you find one at home?
Early Reader · Change the reading level on the articleSome salt is made of sodium. It is in the ocean. It is in your food. We need it to stay healthy. It helps our bodies work. Can you find salt in your kitchen?
Early Reader · Change the reading level on the articleBaking soda is a white powder. It helps cakes grow big. It makes treats soft and light. You can find it in your kitchen. It is very helpful! Do you like to bake?
Early Reader · Change the reading level on the articleThis is a white powder. It can help wash your clothes. It is also used to make glass. It can even be in some food. It helps things work well. Do you like clean clothes?
Early Reader · Change the reading level on the articleThis is a white solid. It can clean drains. It can even help make soap. It is very strong. We must be careful with it. Do you see it in your home?
Early Reader · Change the reading level on the articleSome white salt comes from the ground. It helps plants grow. It can also help keep meat safe to eat. This salt is found in dry places. People dig it up from the earth. Can you find white salt in your kitchen?
Early Reader · Change the reading level on the articleSome things look like glass. They can be white powder too. This stuff can stick things together. It helps make soap and paper. It can even help clean dirty water. It is very useful! Do you like to build things?
Early Reader · Change the reading level on the articleThis is a white salt. It can melt in water. It helps make soap for your clothes. It can also help make paper. It is very useful. Do you like clean clothes?
Early Reader · Change the reading level on the articleEverything hard is made of tiny bits. These bits stick together. They can stay in neat rows. They can also be messy. This makes things strong or soft. It helps us make new tools. Do you like hard things?
Early Reader · Change the reading level on the articleSpace and time are one. They work together like a team. This helps us see where things are. It also shows when things happen. This is how our world works. Can you think of a place in space?
Early Reader · Change the reading level on the articleTime can move in new ways. It can change if you move fast. A clock on a fast ship runs slow. This helps us know how space works. It is a big idea! Do you like to wonder about space?
Early Reader · Change the reading level on the articleA special tool helps us see. It splits light into colors. It can even look at stars. This helps us know what they are made of. It is very cool! Do you like bright colors?
Early Reader · Change the reading level on the articleLight can tell us secrets. We use tools to split light. This shows us many colors. Each thing has its own colors. This helps us learn about stars. It even helps doctors. What colors can you see?
Early Reader · Change the reading level on the articleSpeed is how fast things move. It tells us about motion. A car can go fast or slow. It can even stop. This helps us know how far we go. How fast can you run?
Early Reader · Change the reading level on the articleSound is a fast shake. It travels through the air. It moves very quickly. It can even move through water. It moves through hard things too. Sound helps us hear the world. Can you hear a loud sound?
Early Reader · Change the reading level on the articleTiny bits of matter have a special way of moving. They act like they are spinning. This helps them take up space. It is part of what makes them real. Do you want to learn more?
Early Reader · Change the reading level on the articleThis is a special kind of metal. It does not rust easily. It stays very clean. We use it for spoons and forks. It helps us eat our food. Do you see it in your kitchen?
Early Reader · Change the reading level on the articleThe air pushes on us. It is all around you. This push is called pressure. It is like the air at the sea. We use it to measure things. It helps us learn about our world. Can you feel the air?
Early Reader · Change the reading level on the articleThings can stay very still. A push or a pull can move them. But if the pushes are even, things do not move. This helps us build strong homes. It keeps things safe for you. Can you find something still?
Early Reader · Change the reading level on the articleTiny bits make up everything. They move in many ways. We use math to study them. This helps us know how things work. It is very cool! Can you see tiny bits?
Early Reader · Change the reading level on the articleStephen Hawking was a smart man. He studied the stars and space. He learned how the world works. He wrote books for us to read. His work helps us learn. Do you like to look at the stars?
Early Reader · Change the reading level on the articleSome things are hard to bend. A spring stays in shape. It fights when you push it. This helps things stay strong. It can be soft or hard. Do you like soft things or hard things?
Early Reader · Change the reading level on the article