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 17 of 57
Small parts can sit on a ring. They can sit side by side. They can sit one space apart. They can even sit far away. This helps us know how things are built. It is like a map for tiny bits. Do you like maps?
Early Reader · Change the reading level on the articleArgon is a gas in the air. It does not like to join with other things. Sometimes it makes tiny groups. We can find these in space. It is very cool to see. Do you like looking at the stars?
Early Reader · Change the reading level on the articleSome gases can join together. They make a new thing. It must stay very cold. If it gets warm, it breaks apart. Science is so cool! Can you feel the cold?
Early Reader · Change the reading level on the articleArne Tiselius was a smart man. He studied how things work. He won a big prize for his work. This prize helps science grow. He lived in Sweden. Do you like to learn new things?
Early Reader · Change the reading level on the articleArnold Sommerfeld was a smart teacher. He studied how tiny things work. He taught many people how to be great scientists. His students won big prizes for their work. He helped us learn about the world. Do you like to…
Early Reader · Change the reading level on the articleSome tiny things make rings. These rings are very strong. The tiny parts move in a circle. This helps them stay safe. This is how life works. Do you like rings?
Early Reader · Change the reading level on the articleHeat makes things change fast. When things get hot, they move more. This helps them mix and change. It can make things happen even faster. This is a cool way to see how heat works. Do you like warm things?
Early Reader · Change the reading level on the articleTime moves in one way. It goes from the past to the future. We can remember things that happened. We cannot remember what will happen. This helps us live our lives. Do you like to look back at old days?
Early Reader · Change the reading level on the articleTiny bits move in science. These bits help things change. We use arrows to show them. The arrows show where they go. This helps us see how things work. It is like a map. Can you see the arrows?
Early Reader · Change the reading level on the articleThis is a special gas. It is hard to see. It can be dangerous to breathe. It helps make parts for computers. People must be very careful with it. Can you imagine a gas you cannot see?
Early Reader · Change the reading level on the articleArthur Ashkin was a smart man. He worked with bright light. He made a tool using lasers. It can grab tiny things. This helps us see small cells. It is very cool! Can you imagine using light to move things?
Early Reader · Change the reading level on the articleArthur is a smart scientist. He studies space and tiny bits of light. He found out how these bits move. This helps us learn about the sun. He won a very big prize. Do you want to be a scientist too?
Early Reader · Change the reading level on the articleArthur was a smart man. He studied light. He found out that light acts like tiny bits. This helped us learn about the world. He won a big prize for his work. Do you like to learn new things?
Early Reader · Change the reading level on the articleArthur was a smart man. He helped invent lasers. A laser is a bright beam of light. This light helps us see tiny things. He won a big prize for his work. Do you like bright lights?
Early Reader · Change the reading level on the articleAsh is what stays after a fire. It is a soft powder. It can help plants grow in the dirt. It can even help wash clothes. Ash comes from wood or grass. Do you see ash in a campfire?
Early Reader · Change the reading level on the articleScientists use light to find metals. They use a hot flame. The flame turns metal into a gas. The light hits the gas. This helps us see what is there. It is like magic! Can you find metals in things?
Early Reader · Change the reading level on the articleSome batteries use tiny bits of power. They can last a long time. They help tools in space work. They also help tools deep in the sea. These tools do not need help. They work all by themselves. Can you imagine a…
Early Reader · Change the reading level on the articleSome things glow when they get hot. We can use light to see what is inside. Each thing has its own special color. This helps us know what it is. It is like a secret code. Can you see the colors?
Early Reader · Change the reading level on the articleEverything is made of tiny bits. These bits are called atoms. We can measure how big an atom is. This helps us know how things fit together. Atoms are very, very small. Can you imagine something that small?
Early Reader · Change the reading level on the articleTiny bits make up everything. Each bit sends out light. The light has a special pattern. We can use light to see what is there. This helps us learn about the world. Can you see the light?
Early Reader · Change the reading level on the articleScientists use special ways to measure. They use these to study tiny things. It helps them do math fast. This keeps their work very steady. It makes their work easy to see. Do you like to measure things?
Early Reader · Change the reading level on the articleSome tiny things cannot turn. They stay stuck in one shape. This happens because they are too bulky. This helps make new medicines. It is a neat trick of nature. Can you imagine being stuck like that?
Early Reader · Change the reading level on the articleAugust was a smart man. He studied how tiny things work. He found out how they join together. This helps us make new things. He even had a dream about a snake! Do you like to dream?
Early Reader · Change the reading level on the articleTiny bits of stuff move in rings. They like to find a good spot. Some spots are very crowded. Other spots have more room. This helps us know how they act. Do you like having lots of room to play?
Early Reader · Change the reading level on the articleEverything is made of tiny bits. These bits are too small to see. We use a special number to count them. This number helps us know how much stuff we have. It is a big, big number! Can you imagine counting that many…
Early Reader · Change the reading level on the articlePeople use weights to measure things. They use pounds and ounces. This helps people buy things like wool. It helps us know how heavy things are. It is a very old way to weigh. Do you know how much you weigh?
Early Reader · Change the reading level on the articleScientists think a tiny thing exists. It is very, very small. It might be part of dark matter. Dark matter is all around us. We want to find it. Can you help us look?
Early Reader · Change the reading level on the articleSome liquids mix together. They stay mixed when they boil. They do not change. This is hard to fix. It helps us learn about liquids. Can you see how they work?
Early Reader · Change the reading level on the articleSometimes liquids stick together. We want to pull them apart. We can add a new liquid to help. This helps the mix break up. Then we can get what we need. It is like magic! Do you like to mix things?
Early Reader · Change the reading level on the articleSome things help cars stay safe. One kind of this thing is in airbags. When a car hits something, it helps the bag fill with air. This helps keep you safe. It is very fast! Do you know what else uses air?
Early Reader · Change the reading level on the articleTiny parts move around an atom. They can move in many shapes. Some shapes are round like a ball. Some look like two bells. These shapes help us learn about atoms. It is like a tiny dance. Do you like to dance?
Early Reader · Change the reading level on the articleAzure is a bright color. It looks like the sky. It is a mix of blue and green. You can see it on birds and rocks. It is a very pretty color. Do you like this color?
Early Reader · Change the reading level on the articlePower usually flows one way. Sometimes it flows the wrong way. This can be a big danger. It can hurt the people fixing wires. We must be very careful. Can you see how power moves?
Early Reader · Change the reading level on the articleTiny parts of things use models. These models use balls and sticks. The balls show the small parts. The sticks show how they join. It helps us see how they fit. It is fun to look at! Can you see the colors?
Early Reader · Change the reading level on the articleSome people see balls of light. They look like glowing balls. They can move in a storm. They can be many colors. These lights are very rare. Have you ever seen a bright light? It is a big mystery!
Early Reader · Change the reading level on the articleSome things let power move through them. Some things do not. Tiny bits of stuff must jump to move. This jump needs a little push. Heat or light can help them jump. This helps our tools work. Can you find things that…
Early Reader · Change the reading level on the articleThis is a white solid. It can look gray too. It makes a bright green color in fireworks. It helps things burn. It is very useful. Can you see green sparks?
Early Reader · Change the reading level on the articleA barn is a tiny size. It measures very small things. These things are much smaller than you. It helps us see how small parts hit each other. It is a fun name for a small thing. Do you like the name barn?
Early Reader · Change the reading level on the articleBarry Barish is a scientist. He studies the stars. He helped find tiny ripples in space. This work won him a big prize. His work helps us learn about the world. Do you like to look at the stars?
Early Reader · Change the reading level on the articleA bar measures push. It shows how much air pushes. Air pushes on us all day. It even pushes on car tires. We use it to check the air. Can you feel the air push?
Early Reader · Change the reading level on the articleTiny bits make up everything. Some bits join in groups of three. These groups have a special count. This count helps us know them. It is like a math game. Can you find small things?
Early Reader · Change the reading level on the articleSome powders love water. They want to drink it up. When they touch water, they change. This can be bad for your skin. Be very careful with them. Do you like to play with water?
Early Reader · Change the reading level on the articleSome metals are very common. They do not cost much. They can change color in the air. We use them for many things. These metals help us every day. Do you see any metals near you?
Early Reader · Change the reading level on the articleSome things help make plastic strong. This material helps keep it safe. It stops the plastic from changing. This helps things last a long time. It is very useful for us. Do you use plastic toys?
Early Reader · Change the reading level on the articlePeople study the world to learn. They ask many big questions. This helps us find new ideas. These ideas help us make new things later. It is like a map for us. Do you like to learn new things?
Early Reader · Change the reading level on the articleA beaker is a cup for science. It has straight sides. It can be made of glass or plastic. It helps us hold liquids. It even has a small spout for pouring. Can you see the little spout? It helps you pour without a mess.
Early Reader · Change the reading level on the articleTwo sounds can make a beat. This happens when sounds are not the same. The sound gets loud and then soft. It sounds like a pulse. This helps us tune instruments. Can you hear a beat in music?
Early Reader · Change the reading level on the articleTiny bits of light can act in strange ways. They can be linked even far apart. This link is very special. It helps us learn how the world works. It is a big mystery. Do you want to learn more?
Early Reader · Change the reading level on the article