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 24 of 57
Tiny bits of stuff can change. They lose energy to do this. This makes them turn into new things. It can make heat. This heat helps us in many ways. Can you imagine tiny things changing?
Early Reader · Change the reading level on the article{ "text": Some tiny things change over time. They turn into new, smaller things. These new things are left behind. This helps us learn about our world. It is like a slow chain. Can you imagine tiny things changing?…
Early Reader · Change the reading level on the articleDecember is the last month. It has 31 days. It is cold in some places. It is hot in others. We can see bright stars in the sky. Do you like this month?
Early Reader · Change the reading level on the articleThings can change their shape. You can squeeze them. You can also pull them. Some things go back to their old shape. Other things stay changed. Can you think of something that stays changed?
Early Reader · Change the reading level on the articleTiny things have energy. Sometimes, different states have the same energy. This can happen in many ways. It helps us learn how things work. Can you find something with two ways to move?
Early Reader · Change the reading level on the articleScientists use math to see shapes. They look at tiny bits of stuff. These bits can form rings. They can also have extra bonds. This helps us draw how they look. It is like a puzzle! Do you like puzzles?
Early Reader · Change the reading level on the articleThings can move in many ways. A train moves on a track. It only goes one way. A car can turn and slide. A ship can roll and tilt. How many ways can you move? Can you try it?
Early Reader · Change the reading level on the articleTiny bits of stuff move around. They can hit a wall. This wall is very thin. It is just one spot. The wall can stop them. It can also let them through. Do you think they can jump over it?
Early Reader · Change the reading level on the articleDenis Papin was a smart man. He made new things. He made a pot for cooking food. He also made a machine that uses steam. These things help us today. Do you like to build things too?
Early Reader · Change the reading level on the articleDennis Gabor was a smart man. He found a new way to make pictures. These pictures look very real. We call them holograms. They help us see things in a new way. Do you like cool pictures?
Early Reader · Change the reading level on the articleWe can use computers to study small things. These tiny things make up everything. We look at how they fit together. This helps us learn about new things. It is like a map for tiny bits. Do you want to learn more?
Early Reader · Change the reading level on the articleTiny bits of stuff live in many spots. Some spots have many bits. Some spots have no bits at all. This helps us know how things work. It helps us make new tools. Can you find small bits?
Early Reader · Change the reading level on the articleTiny parts move in small tools. These parts help make power move. Some parts go away from each other. This leaves a space with no parts. This space helps tools work well. Can you find a small tool?
Early Reader · Change the reading level on the articleAir can turn into ice. It does not turn to water first. This happens when the air gets very cold. It makes pretty frost on a leaf. It is a cool thing to see. Do you like the frost?
Early Reader · Change the reading level on the articleSome tiny parts move in science. One part can move to another. This helps things change. It is how many things work. It helps us learn about the world. Do you like to learn new things?
Early Reader · Change the reading level on the articleTiny bits make up everything. These bits can be in different shapes. Some bits stay close. Some bits stay far apart. This helps us know what they are. Do you like shapes?
Early Reader · Change the reading level on the articleSome things soak up water. They keep things dry. They stay in food packs. This helps food stay crunchy. They can also stay in medicine. It keeps the medicine safe. Do you see these little packs?
Early Reader · Change the reading level on the articleWe can heat things to make new stuff. We heat coal or wood very hot. This breaks the material into small bits. It can make gas or oil. It can even make charcoal. This helps us make many things. Can you think of…
Early Reader · Change the reading level on the articleThings like to stay even. Energy moves in one way. It also moves back. This keeps things in balance. It is like a seesaw. Everything stays steady. Do you like things to be even?
Early Reader · Change the reading level on the articleThere is a special kind of hydrogen. It is a bit heavy. It was made a long time ago. It is in the water on Earth. We use it for science. Do you like water?
Early Reader · Change the reading level on the articleScientists use a special bag to clean things. The bag has tiny holes. Small bits can move through the holes. Big bits stay inside. This helps clean the sample. It is like using a strainer. Can you find a strainer in…
Early Reader · Change the reading level on the articleSome things do not like magnets. A magnet can push them away. This can even make things float! Water and wood do this. A frog can even float in a field. Can you imagine floating in the air?
Early Reader · Change the reading level on the articleThis is a special kind of food for plants. It helps things grow in the dirt. It can even help stop big fires. People use it to help make wine. It is very useful! Can you find it in a garden?
Early Reader · Change the reading level on the articleSome tiny things look almost the same. They are not twins. They act in different ways. One kind of sugar works fast. Another kind works slow. This helps our bodies. Can you find things that are almost the same?
Early Reader · Change the reading level on the articleSome tiny things stay in pairs. They are two bits joined together. Most of our air is made this way. It helps us breathe. Can you find the air around you?
Early Reader · Change the reading level on the articleThis is a special gas. It smells very sweet. It can catch fire in the air. It is not safe to touch. We must be very careful. Do you like sweet smells?
Early Reader · Change the reading level on the articleThis is a clear gas. It was used in cold machines. It helped keep things cool. Now we use other things to help the air. We must keep our air safe. Do you like cold things?
Early Reader · Change the reading level on the articleThis is a clear liquid. It smells a little sweet. It helps melt things like paint. It can also join plastic parts together. We must be very careful with it. It can make us feel sick. Have you ever seen a liquid melt…
Early Reader · Change the reading level on the articleSome things show two colors. Light hits them in a special way. One color bounces back. Another color goes through. This makes things look bright. It can even help space suits work. Do you see many colors?
Early Reader · Change the reading level on the articleScientists use a special tool. It looks at how things work. It can test food and even our bodies. This helps us stay healthy. It is very cool! Do you want to learn more?
Early Reader · Change the reading level on the articleTwo tiny parts join together. They make a new ring shape. This ring is very strong. It helps make new things. Scientists use it a lot. Do you like building things with blocks?
Early Reader · Change the reading level on the articleTools like cameras help us see. They use light to make pictures. But light can make things look a little blurry. This is a rule of nature. It helps us know how clear a picture can be. Can you see tiny things?
Early Reader · Change the reading level on the articleWe use different ways to measure things. We can measure how long something is. We can also measure how heavy it is. You cannot compare weight to length. That would not make sense! It helps us check our math. Do you…
Early Reader · Change the reading level on the articleSome gas helps us in many ways. It can help spray hair spray. It can even help keep food cold. This gas can be used as fuel too. It is very useful. Can you think of other sprays?
Early Reader · Change the reading level on the article{ "text":\"This is a clear liquid. It helps make things like plastic. It is also used to make clothes. It can even help make toys. It is a very busy liquid. Do you like playing with toys? \"", "media": […
Early Reader · Change the reading level on the articleThis is a clear liquid. It helps mix things together. It can even go through your skin. It helps keep cells safe when they are frozen. It is very useful. Do you like to mix things?
Early Reader · Change the reading level on the articleSome things have two parts. These parts help them work. One kind helps cars stay warm. They can also be in food. These parts help make many new things. Do you like to see how things work?
Early Reader · Change the reading level on the articleThis is a clear liquid. It can catch fire in the air. It has a bad smell. This liquid is not easy to keep. It can be made with water. Do you like to learn about science?
Early Reader · Change the reading level on the articleA man found a new rule. It helps us see tiny things. This rule shows how they move. It even found a new kind of matter. It is a big win for science. Do you like to learn?
Early Reader · Change the reading level on the articleEverything is made of tiny bits. These bits are called atoms. A man named James found a new bit inside. It has no charge. It helps us learn about atoms. Do you want to learn more?
Early Reader · Change the reading level on the articleTiny bits make up metal. Sometimes they are not in a straight line. These tiny bumps help metal move. They let the metal bend without breaking. This helps us make things. Can you see how they work?
Early Reader · Change the reading level on the articleThis is a special kind of salt. It helps keep food fresh. You can find it in jam and ice cream. It also helps with some pains. It is in many things we eat. Do you like sweet treats?
Early Reader · Change the reading level on the articleSome things are made of two parts. One part is helium. The other part is sodium. They stay together under high pressure. This new thing is clear. It can even be an insulator. Can you find helium in a balloon?
Early Reader · Change the reading level on the articleWhite light can hide many colors. When light hits glass, it bends. Some colors bend more than others. This makes a rainbow. It is very pretty to see! Can you find a rainbow?
Early Reader · Change the reading level on the articleWaves move on the water. Some waves move fast. Some waves move slow. This happens when waves are long. It happens when waves are short. Do you like to watch the sea? It is fun to see them move!
Early Reader · Change the reading level on the articleOne thing can turn into two things. It starts as one kind of stuff. Then it splits apart. It makes two new things. This helps things change in nature. It can even happen in tiny bugs. Do you like to see how things…
Early Reader · Change the reading level on the articleSome things can split apart. Small bits break into even smaller bits. This can happen in water. It helps things work in our bodies. It is like a tiny puzzle. Can you see the tiny bits move?
Early Reader · Change the reading level on the articleSome things like to stay together. Other things like to break apart. This number tells us how they do. It shows if they stay stuck or split up. It helps us learn about medicine. Do you like to build things?
Early Reader · Change the reading level on the article