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 52 of 57
Try Science Lab activities about forces and motion, light, sound and electricity or matter and chemistry.
Tiny bits of silver move in a line. They go through a magnet. The magnet pulls them up or down. They do not stay in one line. They make two paths. This shows how tiny things work. Can you see the two paths?
Early Reader · Change the reading level on the articleSteven Chu is a smart scientist. He studies tiny things. He uses light to cool them down. This work won him a big prize. He also helped lead the country's energy. He wants to keep our Earth safe. Do you like science?
Early Reader · Change the reading level on the articleSteven Weinberg was a smart man. He studied how the world works. He learned about tiny bits of things. He won a big prize for his work. His work helps us know our world. Do you like to learn new things?
Early Reader · Change the reading level on the articleThis is a clear gas. It smells like garlic. It can be bad for us. It can hurt our blood. We must be very careful. Can you imagine a garlic smell?
Early Reader · Change the reading level on the articleTiny bits of light can make more light. One bit of light hits a tiny part of an atom. This makes a new bit of light. The new light is just like the first one. This helps make a laser. Can you see a laser beam?
Early Reader · Change the reading level on the articleA special engine uses heat to move. It uses air inside a tube. The air gets hot and moves a part. This makes the engine work. It can even help keep things cool. Do you want to see it move?
Early Reader · Change the reading level on the articleThings change when they mix. One thing turns into another. We can count what we need. This helps us make just the right amount. It is like a recipe. Can you guess what will happen next?
Early Reader · Change the reading level on the articleLight moves in many ways. It can shake up and down. It can also shake in circles. We use special numbers to see this. These numbers help us study light. Can you see the light?
Early Reader · Change the reading level on the articleTiny bits of stuff have energy. Sometimes they feel tight. It is like a squeezed spring. This tight feeling is called strain. It can make them change shape. Do you like to stretch?
Early Reader · Change the reading level on the articleTiny bits make up our world. Some bits act in a strange way. They take a long time to change. This helps us learn about how things work. It is a big mystery. Do you like to solve mysteries?
Early Reader · Change the reading level on the articleTiny bits make up everything. Some bits are called strange. They are very, very small. They help make the world. We can study them to learn. Do you like to learn new things?
Early Reader · Change the reading level on the articleEverything has energy. Energy and movement can be in many places. They can even be in light. This energy helps make gravity. Gravity pulls on things. It is all around us. Can you feel gravity?
Early Reader · Change the reading level on the articleTiny bits make up our world. They look like small points. But they might be tiny strings. These strings can wiggle and shake. They can be loops or lines. This helps us learn how things work. Do you want to learn more?
Early Reader · Change the reading level on the articleWe can clean dirty water. One way is to use gas. The gas moves bad things out. This helps keep our water safe. It is like magic! Can you help keep the Earth clean?
Early Reader · Change the reading level on the articleTiny parts make up everything. These parts join together. They hold hands to stay close. This helps us see how they fit. It is like a map for small things. Can you see the shapes?
Early Reader · Change the reading level on the articleTiny bits make up everything. They can join in many ways. Some things have the same bits. But the bits are in a new shape. This makes a new thing. Can you see the shapes?
Early Reader · Change the reading level on the articleSome things turn from solid to gas. They do not turn into liquid first. This is very cool to see. It can happen to ice, too. Have you seen this happen?
Early Reader · Change the reading level on the articleChandra was a smart man. He studied the stars. He found out how they work. This helps us know the sky. He won a big prize. Do you like to look at stars?
Early Reader · Change the reading level on the articleTiny bits can swap places. One bit leaves a small group. A new bit takes its place. This makes a new thing. It helps us build many things. Do you like to swap toys?
Early Reader · Change the reading level on the articleA substrate is a base. It can be a flat floor. It can be a tiny bit of stuff. It helps other things work. It can hold a sample. It can help change things. Can you find a base?
Early Reader · Change the reading level on the articleSugar is sweet and tasty. It comes from plants. Some plants grow in warm places. Some grow in cool places. We use it in food. Do you like sweet treats?
Early Reader · Change the reading level on the articleWe can use air to pull things apart. This tool pulls liquid through a screen. It leaves the solid bits behind. The bits stay very dry. This helps us work fast. It is a neat trick! Can you see how it works?
Early Reader · Change the reading level on the articleSome things smell like rotten eggs. This is from sulfur. It can make silver turn black. It also makes bright yellow colors. Some parts help us make things. Do you like to explore rocks?
Early Reader · Change the reading level on the articleSome things in food help it stay good. They can be in dried fruit. They are also in some drinks. This helps keep the food fresh. Some people must be careful with them. Do you look at food labels?
Early Reader · Change the reading level on the articleSome liquids help clean our homes. These liquids are very strong. They can help make soap. They can even help make medicine. We use them in many ways. Do you use soap to wash?
Early Reader · Change the reading level on the articleSome air has a strong smell. It can come from volcanoes. It is also in some fruit. It helps keep food fresh. We must be careful with it. Do you like the smell of matches?
Early Reader · Change the reading level on the articleSome gas is very heavy. It can hide in low spots. This gas helps make power. It also helps make tiny parts for tools. It can even make a voice sound deep. Can you imagine a deep voice?
Early Reader · Change the reading level on the articleSome things are made in big factories. This stuff can turn into strong acid. It can even start a fire. It is hard to keep in a jar. We use it to make soaps. Do you like soap?
Early Reader · Change the reading level on the articleSunday is a day of the week. It is the day of the sun. Many people rest on this day. It is a day for church too. Do you like to rest on Sunday?
Early Reader · Change the reading level on the articleSome liquids are very strong. They are called superacids. These liquids can eat through things. They help make gas for cars. They are much stronger than old acids. Do you think they are cool?
Early Reader · Change the reading level on the articleSome things are very strong. They like to grab tiny bits. These bits are very small. They help us make new things. It is a neat trick! Do you like to build things?
Early Reader · Change the reading level on the articleSome things are not gas or liquid. They are both at once. This happens when it is very hot. It also happens when it is squeezed hard. This can help take caffeine out of coffee. Can you imagine a gas that acts like a…
Early Reader · Change the reading level on the articleSome liquid can act very strange. It is very, very cold. This liquid can crawl up walls. It can flow through tiny holes. It even moves without any help. Can you imagine that?
Early Reader · Change the reading level on the articleSome liquids can move in a special way. This liquid is very, very cold. It can crawl up the sides of a cup. It does not stop moving. It flows like magic. Can you imagine a liquid that crawls?
Early Reader · Change the reading level on the articleSome people study how space works. They look at how things fall. They think about tiny bits of stuff. It helps us know the world. We can learn so much! Do you like to wonder?
Early Reader · Change the reading level on the articleSteam is hot air from water. This steam is extra hot. It is very dry. It helps big engines run. It can also dry things out. It is a powerful tool. Do you like steam?
Early Reader · Change the reading level on the articleSometimes water gets very hot. It does not bubble yet. This can happen in a smooth cup. It can splash out fast. Be very careful with hot water. Do you like to watch bubbles?
Early Reader · Change the reading level on the articleSome parts of our world are very big. Scientists make these big parts in labs. They are not found in nature. They can be very hard to hold. They do not last long. Can you find them in a book?
Early Reader · Change the reading level on the articleTiny bits of air can change. They can help our bodies. Some bits help fight germs. Other bits can be bad. We have ways to stay safe. Do you want to learn more?
Early Reader · Change the reading level on the articleSome things are hard like a rock. Other things flow like water. A special thing can do both! It stays in a shape. But it can also flow without stopping. It is very strange. Can you imagine that?
Early Reader · Change the reading level on the articleEverything is made of tiny strings. These strings are very small. They wiggle and move. This helps things work. It is a big idea. Can you imagine tiny strings?
Early Reader · Change the reading level on the articleTiny bits join together. They do not use glue. They use soft pulls to stay close. This helps make living things. It helps things work in your body. It is like magic! Do you see how they fit?
Early Reader · Change the reading level on the articleScientists look at the very top of things. They see where two things touch. This can be a solid and a liquid. It helps us make new tools. It is very cool to see! Do you like to look closely?
Early Reader · Change the reading level on the articleSome things help water and oil mix. These things have two parts. One part likes water. The other part stays away from water. This helps wash away dirt. It can even make bubbles. Do you use soap to get clean?
Early Reader · Change the reading level on the articleThings can change from even to uneven. A ball can sit on a hill. It might roll down one side. Now it is not in the middle. This helps things find a resting place. Can you find things that are even?
Early Reader · Change the reading level on the articleBig machines move tiny bits. They go in a big circle. The bits go faster and faster. This helps us learn about our world. It is very cool! Can you imagine moving that fast?
Early Reader · Change the reading level on the articleTiny bits move very fast. They zoom around magnets. This makes a bright light. We can see it in space. It helps us learn about stars. Can you see the glow?
Early Reader · Change the reading level on the articlePeople can make things like nature does. We make copies of things in the world. These help us make new tools. They can even help us feel better. It is very cool! Can you find things made by people?
Early Reader · Change the reading level on the article