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 16 of 57
This is a hard yellow stone. It is made of metal and carbon. It can get very hot in water. This heat can be a lot. It can even make a gas. It helps make strong tools. Do you like hard things?
Early Reader · Change the reading level on the articleThis is a special salt. It looks like clear crystals. It can help make metal. It can even help stop sweating. It is very useful. Do you like science?
Early Reader · Change the reading level on the articleSome rocks are very special. They can be bright red rubies. They can be blue sapphires. These gems are very hard. They help make tools. They even help make metal. Can you find a shiny gem?
Early Reader · Change the reading level on the articleThis salt helps clean our water. It makes dirt clump together. Then the dirt sinks to the bottom. This makes the water clear. It helps us have clean water to drink. Do you like clean water?
Early Reader · Change the reading level on the articleThis is a liquid used for cleaning. It is made with water. It helps clean glass and metal. It can also help make food rise. Be careful because it can sting your eyes. Do you use this at home?
Early Reader · Change the reading level on the articleThis is a white powder. It can be used in food. It also helps keep roads safe. It can help clean old things. It is a very useful thing. Do you like to learn new things?
Early Reader · Change the reading level on the articleThis is a white powder. It helps make cookies rise. It can also help plants grow. It makes a strong smell. We use it in food. Do you like cookies?
Early Reader · Change the reading level on the articleThis is a white powder. It helps make food light. It can make cookies rise. It has a strong smell. It is used in baking. Do you like cookies?
Early Reader · Change the reading level on the articleThis is a white salt. It looks like tiny crystals. It helps plants grow big. It can also make food taste good. It is very useful. Do you like salty treats?
Early Reader · Change the reading level on the articleSome white powder helps plants grow. It is in food for soil. It can also stop fires. You can even grow crystals with it. It is fun to see! Do you like plants?
Early Reader · Change the reading level on the articleThis is a special kind of iron. It can mix well with water. Some drinks use it to stay tasty. It also helps doctors see inside you. It is a very helpful thing. Do you like to drink juice?
Early Reader · Change the reading level on the articleThis is a white salt. It can look yellow too. It helps make things very clean. We use it to clean metals. It is a small but helpful thing. Can you find something white in your house?
Early Reader · Change the reading level on the articleSome things in the air change fast. This stuff can turn into water. It can also turn into air. It can even pop if it gets hot. It is not easy to keep. Do you like to see how things change?
Early Reader · Change the reading level on the articleSome white bits help rockets fly. They are used in big engines. This helps them go up fast. It is a very strong part. It can be a bit risky. Do you like looking at rockets?
Early Reader · Change the reading level on the articleWe use this to measure power. It tells us how much energy a battery holds. It helps your phone stay on. It helps your car start too. It is a very useful way to count. Do you use batteries often?
Early Reader · Change the reading level on the articleElectricity and magnets work together. A wire can make a magnet. This happens when power flows through it. It can move a small compass needle. It is a very cool trick. Can you find a magnet near you?
Early Reader · Change the reading level on the articleWires with power can pull on each other. This happens with a special pull. The pull can move the wires. It helps us use power. Do you see how they move?
Early Reader · Change the reading level on the articleSome things like water. They also like oil. This helps them clean things. Soap uses this to wash skin. It helps make up our tiny cells too. It is very neat! Can you find soap in your house?
Early Reader · Change the reading level on the articleSome things can act in two ways. They can be like an acid. They can also be like a base. Water is one of these things. It helps us every day. Can you find water nearby?
Early Reader · Change the reading level on the articleScientists use math to study how things move. They look at a whole group at once. This helps them solve hard problems. It makes work much faster. It is like a smart way to think. Do you like to solve puzzles?
Early Reader · Change the reading level on the articleAnders was a smart man. He lived in Sweden. He studied light and heat. He looked at the sun. He even looked at lights in the sky. He helps us learn about the world. Can you look at the sun too?
Early Reader · Change the reading level on the articleAndre Geim is a smart man. He finds new things. He found a very thin layer of carbon. It is very strong. He even made a frog float! Do you like to learn new things?
Early Reader · Change the reading level on the articleLight hits things in different ways. It can hit a flat floor. It can hit the ground. This helps us see the sun. The sun's light hits the Earth. It can hit at a tilt. We can watch the light move. Can you see the light…
Early Reader · Change the reading level on the articleWhen you pour sand, it makes a pile. The pile has a slope. Some piles are tall and steep. Other piles are flat. The sand stays still until it slides. Can you make a sand pile?
Early Reader · Change the reading level on the articleIt is a tiny way to measure. It measures things that are very small. It helps us see tiny parts. This helps us learn about our world. Do you want to see small things?
Early Reader · Change the reading level on the articleThings can spin faster or slower. This is a change in spin. It happens when things turn. We can see it in toys. It is fun to watch. Do you like to spin?
Early Reader · Change the reading level on the articleThings can spin in a circle. They spin around a center point. This spin can go one way or the other. We can measure how much they turn. It helps us know where things go. Do you like to spin?
Early Reader · Change the reading level on the articleThings can spin in a circle. Some things spin very fast. Some things spin slow. This helps us know how they move. It is fun to watch things turn. Do you like to spin around?
Early Reader · Change the reading level on the articleTiny things can spin. They spin in a special way. This spin helps us learn about them. It is a part of how they move. It is very cool! Can you imagine things spinning?
Early Reader · Change the reading level on the articleSome tools help us see small things. A big telescope can see far away. It can see two stars close together. This helps us see the world better. It is like having super eyes! Can you see tiny things too?
Early Reader · Change the reading level on the articleThings can spin or move in a circle. This tells us how fast they turn. It can be a fast spin or a slow one. It helps us see how things move. Do you like to spin around?
Early Reader · Change the reading level on the articleThis is a book for science. It has been around for a long time. It shares new ideas about how things work. Famous people read it. It helps us learn about the world. Do you like to learn new things?
Early Reader · Change the reading level on the articleTiny bits of stuff can crash. When a bit meets its twin, they go poof! They turn into light. This light moves very fast. It is like magic. Can you see the tiny light?
Early Reader · Change the reading level on the article{ "text": \"An anode is part of a battery. It helps make power. Tiny bits move out of it. These bits help things work. This helps us use tools. Do you use a battery today?\", "media": [ "File:Zinc anode 2.svg" ] }
Early Reader · Change the reading level on the articlePlants have many bright colors. These colors are in fruits and flowers. Some are red or blue. They can even be purple. These colors help us see them. Do you like bright colors?
Early Reader · Change the reading level on the articleSome plants have bright colors. They can be red, blue, or purple. You can see them in berries and flowers. These colors help plants in many ways. Do you like purple food?
Early Reader · Change the reading level on the articleAnthony Leggett was a smart man. He studied how things work. He looked at very cold liquids. His work won a big prize. He helped us learn about our world. Do you like to learn new things?
Early Reader · Change the reading level on the articleSome tiny things are not calm. They are shaped like rings. These rings have too much energy. They want to change. They can bend to feel better. Do you like to stay calm too?
Early Reader · Change the reading level on the articleSome things have a tiny pull. This pull goes in two ways. One part pulls up. The next part pulls down. They cancel each other out. This makes the pull stay at zero. Can you feel a magnet?
Early Reader · Change the reading level on the articleThere is a special kind of gas. It is like the air we know. But it is not the same. It is made of tiny parts that are opposite. It is very rare. Can you find it?
Early Reader · Change the reading level on the articleSome tiny things are like twins. They look like real things. But they are not the same. They act in a back way. This is very cool to see. Can you find a twin?
Early Reader · Change the reading level on the article{ "text": [ "Some tiny bits are like twins. ", "They are the opposite of our bits. ", "These bits can be found in space. ", "They help us learn about our world. ", "It is a big mystery! ", "Can you imagine tiny…
Early Reader · Change the reading level on the articleA hole lets light in. It is like a tiny window. Your eye has a small hole too. It helps you see things well. It can be big or small. Can you see the light?
Early Reader · Change the reading level on the articleWe use science to move things. It helps us build big bridges. It helps us fly fast planes. This science makes our world work. It is all around us. Do you like to build things?
Early Reader · Change the reading level on the articleApril is a month in the year. It has 30 days. In many places, spring starts now. Flowers begin to open. This is a pretty time. Do you like the spring?
Early Reader · Change the reading level on the articleThis is a special liquid. It can melt gold. Most liquids cannot do that. It helps make gold very pure. It is a very strong liquid. Do you like gold?
Early Reader · Change the reading level on the articleSome things mix well in water. Salt is one thing that mixes. It disappears into the water. This helps us make many things. It is like magic! Can you find something that mixes in water?
Early Reader · Change the reading level on the articleWater helps things float. When you put a toy in a tub, the water pushes up. This push helps the toy stay on top. It makes things feel lighter. Do you like to splash in the water?
Early Reader · Change the reading level on the article