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 9 of 57
Max Planck was a smart man. He studied how the world works. He found new things about tiny bits of energy. This helped many people learn. He even won a big prize. Do you like to learn new things too?
Early Reader · Change the reading level on the articleSome rules help us learn about light. They show how electricity and magnets work. These rules help us use radios and lights. They make our world work. Do you see light? It moves very fast!
Early Reader · Change the reading level on the articleThings move in our world. Pushes and pulls make them go. A push can change where things are. This helps us learn how things work. It is fun to watch! Do you like to move things?
Early Reader · Change the reading level on the articleIce can turn into water. This happens when it gets warm. Heat makes the ice change. It can turn into a liquid. This is fun to see. Do you like ice?
Early Reader · Change the reading level on the articleMercury is a heavy metal. It looks like shiny silver. It is a liquid at room temperature. It can flow like water. This metal is used in some tools. It can be bad for our bodies. Do you like shiny things?
Early Reader · Change the reading level on the articleTiny bits make a meson. They are very small. They do not stay for long. They break apart fast. This helps us learn. Do you like tiny things?
Early Reader · Change the reading level on the articleMetals are very strong. Tiny bits inside them move around. These bits act like a big sea. They hold the metal parts together. This helps metal carry heat and light. Do you like playing with metal toys?
Early Reader · Change the reading level on the articleSome things are in the middle. They are not quite metals. They are not quite not metals. They act like both! They help make things like computers work. Can you find them on a chart?
Early Reader · Change the reading level on the articleMethane is a clear gas. It is found under the ground. We use it for heat and cooking. It can even help rockets fly! It helps keep our world warm. Do you know where it comes from?
Early Reader · Change the reading level on the articleA metre is for measuring how long things are. It helps us know how far to go. We use it to measure many things. It helps us build and play. It is a very helpful tool. Can you find something one metre long?
Early Reader · Change the reading level on the articleWe use special ways to measure things. It helps us know how long or heavy things are. This system uses easy numbers. It works in most parts of the world. It makes math simple for us. Do you like to measure things?
Early Reader · Change the reading level on the articlePeople use tools to measure things. We measure how long or heavy things are. This helps us buy things fairly. It helps us build big things too. It is very helpful for everyone. Do you like to measure things?
Early Reader · Change the reading level on the articleTwo men wanted to study light. They thought light moved through a special air. They tried to find this air. But they could not find it. The light moved the same way every time. This helped us learn how the world…
Early Reader · Change the reading level on the articleMicrowaves are waves of energy. They help us cook food. They also help us talk on phones. We use them for many things. Can you find a microwave in your home?
Early Reader · Change the reading level on the articleMikhail was a great thinker. He loved to learn new things. He studied stars and air. He helped build a big school. His work helps us learn today. Do you like to learn too?
Early Reader · Change the reading level on the articleA minute is a way to tell time. It is made of sixty small bits. These bits are called seconds. We use minutes to track our day. They help us know when to go. Do you like to watch the clock?
Early Reader · Change the reading level on the articleSometimes you see things that are not there. You might see water on a hot road. It is just the sky! The air bends the light. This makes a trick for your eyes. Have you seen this before?
Early Reader · Change the reading level on the articleA mirror shows you a picture. It bounces light back to your eyes. This makes you see yourself. You can use one to fix your hair. It is a fun tool. Can you see your face in a mirror?
Early Reader · Change the reading level on the articleYou can mix things together. Some things stay the same. Sand in water is one way. You can see the sand. It does not change. It is still sand. Can you find a mix at home?
Early Reader · Change the reading level on the articleTiny bits make up everything. These bits move in special ways. They join together to make things. This helps tiny parts stick. It is how things are built. Do you like to build things?
Early Reader · Change the reading level on the articleTiny bits make up everything. These bits move around atoms. They help atoms stick together. This makes a molecule. This is how things stay whole. Do you see things around you?
Early Reader · Change the reading level on the articleA mole is a big group. It counts tiny things. These things are too small to see. We use it to count atoms. It helps us work with science. Do you want to count tiny things too?
Early Reader · Change the reading level on the articleThis is a strong metal. It looks like shiny silver. It helps make steel very hard. We need it to stay healthy. It is in our bodies too. Do you like strong things?
Early Reader · Change the reading level on the articleSome things are hard to spin. It depends on how heavy they are. It also depends on their shape. A skater spins fast by pulling in their arms. Can you spin fast too?
Early Reader · Change the reading level on the articleA month is a way to count time. It is like the moon in the sky. The moon changes its shape every month. We use months to know the date. Do you know your birthday month? It is fun to watch the moon!
Early Reader · Change the reading level on the articleTiny bits fly through the air. They are like heavy electrons. They can go deep into the ground. They even reach deep mines. These bits are very small. They move very fast. Do you want to find them?
Early Reader · Change the reading level on the articleMurray Gell-Mann was a smart man. He studied how things work. He found tiny bits that make up our world. These bits are called quarks. He won a big prize for his work. Do you like to learn new things?
Early Reader · Change the reading level on the articleScientists use special ways to measure. They use things in nature to help. This makes math much easier to do. It helps them learn about the world. Do you like to measure things?
Early Reader · Change the reading level on the articleThis is a special metal. It is shiny and silver. It can make very strong magnets. We use it in headphones and cars. It helps our tools work well. Can you find a magnet?
Early Reader · Change the reading level on the articleNeon is a special gas. It makes a bright red glow. You can see it in signs. It is very pretty to look at. Do you like bright lights?
Early Reader · Change the reading level on the articleThis is a hard metal. It looks like silver. It is not found in nature. People make it in special machines. It can help power space ships. Do you like looking at stars?
Early Reader · Change the reading level on the articleTiny bits fly through everything. They come from the sun. They move very fast. They can pass through you. You do not feel them. They are very small. Can you find them?
Early Reader · Change the reading level on the articleEverything in space pulls on each other. This pull is called gravity. It keeps our feet on the ground. It also keeps the moon near us. Big things have a strong pull. Small things have a small pull. Can you feel the…
Early Reader · Change the reading level on the articleA newton is a way to measure push. It tells us how strong a push is. It helps us talk about weight. It helps us move things. We use it every day. Can you feel a push?
Early Reader · Change the reading level on the articleNickel is a shiny metal. It looks like silver. It can be used to make coins. It also helps make strong steel. We use it in many things. Can you find a coin?
Early Reader · Change the reading level on the articleSadi Carnot was a smart man. He studied how heat works. He wanted to help steam engines work better. His ideas help us today. He was a great thinker. Do you like to learn how things work?
Early Reader · Change the reading level on the articleNiels Bohr was a smart man. He studied tiny things. He found out how atoms work. This helps us know our world. He was a great teacher too. Do you like to learn new things?
Early Reader · Change the reading level on the articleNiobium is a grey metal. It is very strong. It helps make steel tough. This metal is used in rings. It is also used in big machines. Can you find it in your home?
Early Reader · Change the reading level on the articlePlants need food to grow. This food comes from the soil. It helps them make leaves. It also helps them grow roots. We use it on farms. It helps food grow for us. Do you like plants?
Early Reader · Change the reading level on the articleSome gases are very quiet. They do not like to change. They do not mix with other things. One gas helps big balloons fly. These gases are all around us. Do you like to see balloons fly?
Early Reader · Change the reading level on the articleNoise is sound that we do not want. It can be very loud. Loud sounds can hurt our ears. Too much noise can stop us from sleeping. It can even make us feel stressed. We must be careful with loud sounds. Do you hear…
Early Reader · Change the reading level on the articleSome tiny things have a lot of energy. They can change into new things. This can help doctors treat sick people. It can also help us make power. Science helps us learn how this works. Do you want to learn more?
Early Reader · Change the reading level on the articleTiny parts of things can split apart. This makes a lot of heat. It can make power for our homes. It can also make a big blast. We use this heat in many ways. Do you want to learn more?
Early Reader · Change the reading level on the articleStars make light and heat. They do this by joining tiny bits together. This makes a lot of power. It helps the sun shine on us. This is very cool! Can you feel the sun's heat?
Early Reader · Change the reading level on the articleEverything is made of tiny bits. These bits have a center. The center is very small. It holds the tiny parts together. This helps make the world. Can you imagine something so small?
Early Reader · Change the reading level on the articleEverything is made of tiny bits. These bits make up all things. Stars make these bits in their hot centers. Some bits come from big explosions too. These bits make up you and me. Can you find your favorite thing?
Early Reader · Change the reading level on the articleEverything is made of tiny bits. These bits have centers. The centers have small parts inside. Some parts stay still. Some parts change over time. This helps us learn about our world. Can you find tiny things too?
Early Reader · Change the reading level on the articleNylon is a special kind of thread. It can be soft or strong. People use it to make clothes and rugs. It is used to make many things. Do you wear nylon today?
Early Reader · Change the reading level on the article