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 29 of 57
Some ants make a special liquid. It helps them stay safe. They can spray it to defend their homes. You can also find it in fruit like apples. It is a part of nature. Do you like eating apples?
Early Reader · Change the reading level on the articleA heavy weight swings on a long string. It moves back and forth. The swing looks like it turns in a circle. This happens because our Earth is spinning. It is a cool way to see our world move. Can you see it spin?
Early Reader · Change the reading level on the articleLight moves very fast. A man named Foucault tested it. He used a spinning mirror. He found light moves slower in water. It moves faster in air. This helps us learn about light. Do you like to learn about light?
Early Reader · Change the reading level on the articleLight moves in waves. These waves can be many small parts. We can use math to see them. This helps us make clear pictures. It helps us make tiny computer chips. Can you see the light waves?
Early Reader · Change the reading level on the articleA special tool uses light to see things. It can look at solids or liquids. It shines many colors of light at once. A computer helps read the light. This helps us learn about the world. Do you like to learn about light?
Early Reader · Change the reading level on the articleThings have energy and movement. We can track them both at once. This helps us see how they change. It is a way to study space. It helps us learn about tiny bits. Can you think about moving fast?
Early Reader · Change the reading level on the articleSpace and time are joined together. We use four parts to find a spot. One part is for time. Three parts are for space. This helps us see how things move. Can you imagine a world with four parts?
Early Reader · Change the reading level on the articleWe can make things very clean. We start with a warm liquid. Then we make it very cold. Hard bits called crystals grow. This helps us get pure stuff. It is like making ice. Can you see the small crystals?
Early Reader · Change the reading level on the articleWe can separate a mix. Heat makes things turn to gas. This helps us sort them. It helps us make things like fuel. It is like magic! Can you see how it works?
Early Reader · Change the reading level on the articleSome things do not break easily. Metals are very tough. They stop cracks from growing. This helps keep us safe. Can you think of something strong?
Early Reader · Change the reading level on the articleSome things smell very good. These smells come from the air. They can come from fruit or flowers. We use them in soaps and perfumes. They make the world smell nice. Do you have a favorite smell?
Early Reader · Change the reading level on the articleFrancis Aston was a smart man. He studied how tiny parts of things work. He found out that some parts have different weights. This helped us learn about our world. He even won a big prize! Do you like to learn new…
Early Reader · Change the reading level on the articleTiny bits of energy fly through a tube. They hit small pieces of metal. Sometimes the bits hit and lose their speed. This helps us learn how tiny things work. It is very cool! Can you imagine being so small?
Early Reader · Change the reading level on the articleFrançois Englert is a smart man. He studies how things work. He found out why tiny parts have weight. This helps us learn about the world. He won a big prize for his work. Do you like science?
Early Reader · Change the reading level on the articleA man named Raoult studied liquids. He lived a long time ago. He found out how things change in water. Adding stuff can stop things from freezing. This helps us learn many things. Can you find ice in your freezer?
Early Reader · Change the reading level on the articleFrank Wilczek is a smart man. He studies how the world works. He looks at very tiny things. He won a big prize for his work. His ideas help us learn. Do you like to learn new things?
Early Reader · Change the reading level on the articleLight can bend around things. It makes stripes of light and dark. This happens when light goes through a small hole. You can see these patterns far away. It is like magic with light! Can you see the stripes?
Early Reader · Change the reading level on the articleSunlight has many dark lines. These lines hide in the light. They happen in the Sun's air. They help us learn about the Sun. It is like a secret map. Do you see the dark lines?
Early Reader · Change the reading level on the articleFrederick Reines was a scientist. He found a tiny thing in space. Many people thought it could not be seen. He worked hard to find it. He won a big prize for his work. Do you like to find new things?
Early Reader · Change the reading level on the articleFrederick Soddy was a smart man. He studied how things change. He found out how tiny bits of matter act. This work helped us learn a lot. He even won a big prize. Do you like to learn new things?
Early Reader · Change the reading level on the articleA drawing helps us see things. We draw a box or a dot. We add arrows to show pushes and pulls. These arrows show where things go. It helps us learn how things move. Can you see the arrows?
Early Reader · Change the reading level on the articleMetals have tiny parts inside. These parts move around. They act like a gas. They move through the metal. This helps move heat and power. Can you find metal near you?
Early Reader · Change the reading level on the articleGravity pulls things down. It pulls on everything. A heavy ball falls fast. A light ball falls fast too. They hit the ground together. This is how the world works. Can you feel gravity pull you?
Early Reader · Change the reading level on the articleFreeman Dyson loved math. He studied big numbers. He also studied the stars. He had many new ideas. He helped us learn about space. Do you like to look at the stars?
Early Reader · Change the reading level on the articleSome tiny bits change over time. These bits turn into other things. They break apart into three new bits. This helps us learn about space. It is a big mystery! Can you imagine tiny bits changing?
Early Reader · Change the reading level on the articleA tiny part can move on its own. It does not have to stay in one spot. No force pulls on it. It can travel through space. It moves like a small wave. This helps us learn about the world. Can you imagine moving like a…
Early Reader · Change the reading level on the articleTiny bits of stuff can move. They like to join together. This helps make new things. It is like building with blocks. It happens very fast. Do you want to learn more?
Early Reader · Change the reading level on the articleWater can move inside a big boat. It slides to one side. This can make the boat tilt. It might even tip over. We must keep the boat steady. Have you ever seen water slosh?
Early Reader · Change the reading level on the articleMusic travels through the air. It uses a special wave. This wave changes to carry sound. It helps music sound very clear. This is how we hear the radio. Do you like to listen to music?
Early Reader · Change the reading level on the articleLight hits things like glass. Some light bounces back. Some light goes through. This helps us see. It is very cool! Can you see light bounce?
Early Reader · Change the reading level on the articleA big lens helps ships see. It makes light very bright. The light shines far out at sea. This helps boats stay safe. It is a very smart tool. Can you see the bright light?
Early Reader · Change the reading level on the articleSome things stick to surfaces. A gas can stick to a solid. It works like a magnet. This helps us learn how it works. It is very neat to see. Do you like to see how things stick?
Early Reader · Change the reading level on the articleSome ideas are not quite science yet. They are new or may be wrong. We test ideas to see if they work. Some ideas become true later. Others stay as just ideas. Do you like to ask questions?
Early Reader · Change the reading level on the articleFrits Zernike was a smart man. He studied how light works. He made a tool to see tiny cells. This tool helps us see them live. It is a great discovery. Do you like to look at tiny things?
Early Reader · Change the reading level on the articleSome oil helps things move. It can heat your home. It can power big ships. It can also help trucks go. This oil helps us every day. Do you see big trucks?
Early Reader · Change the reading level on the articleTiny bits of carbon can make balls. These balls look like soccer balls. They can also look like long tubes. These bits are found in space. They are even in soot. Do you want to see them?
Early Reader · Change the reading level on the articleSmall groups of atoms act in a special way. These groups change how a tiny part of things works. They help things mix or change. This helps us know what things will do. It is very cool! Do you like to see how things…
Early Reader · Change the reading level on the articleRules help us know how things work. Scientists use math to study heat and space. This math shows how energy moves. It helps us see how things change. We can learn a lot from it. Do you like to learn how things work?
Early Reader · Change the reading level on the articleThis is a special kind of glass. It is very strong. It can get very hot. It does not break easily. It helps us see far away in space. Can you find glass in your home?
Early Reader · Change the reading level on the articleGabriel Lippmann was a smart man. He loved to study science. He found a way to make color photos. This helped us see the world. Do you like colorful photos?
Early Reader · Change the reading level on the articleThings move in a steady way. Imagine you are on a smooth boat. You cannot tell if it moves. The rules of how things move stay the same. This helps us learn about the world. Do you like boats?
Early Reader · Change the reading level on the articleMoving things can look different. If you move, things change. A ball rolls down a ramp. You can see how it moves. This helps us know how things work. It is very cool! Do you like to move?
Early Reader · Change the reading level on the articleSome metal is a liquid. It stays runny at room temperature. It is made of three metals. It is safer than mercury. We use it in some tools. Can you imagine liquid metal?
Early Reader · Change the reading level on the articleThis is a very hard stuff. It helps make blue lights. It also helps make fast chargers. These chargers are very small. They help our tools work well. Do you like blue lights?
Early Reader · Change the reading level on the articleA battery makes power. It uses two metals. These metals sit in a liquid. This makes a tiny spark. It helps us use tools. Do you like to use batteries?
Early Reader · Change the reading level on the articleSome metals stay bright. Other metals can wear away. This happens in salty water. It can change how things look. It is a neat way to learn. Do you like shiny things?
Early Reader · Change the reading level on the articleSome things show many colors. A screen shows colors to you. Some screens show more colors than others. This helps pictures look real. It is very fun to see. Can you see many colors?
Early Reader · Change the reading level on the articleA machine can sort things. It takes a mix of stuff. Then it pulls them apart. This helps us see what is inside. It is like magic! Can you imagine sorting a big pile of toys?
Early Reader · Change the reading level on the article