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 34 of 57
Big things pull on space. This pull is called gravity. It can even bend light. It can change how time moves. Gravity helps us understand the stars. Do you want to look up?
Early Reader · Change the reading level on the article{ "text": \"Small things act in strange ways. They do not move like big toys. Tiny bits can act like waves. This helps us learn about atoms. It is a big mystery! Can you imagine tiny things acting like waves?\",…
Early Reader · Change the reading level on the articleSome things stay the same. They do not change. This can happen in space. It can happen in time. It helps us know how the world works. It is very cool. Do you like things that stay the same?
Early Reader · Change the reading level on the articleSome things happen fast. We can count how many times they happen. It tells us how quick things are. This helps us know how fast things go. It is a fun way to look at time. Can you count fast things?
Early Reader · Change the reading level on the articleLight gets dim as you move away. It spreads out in a big circle. If you go far, it is hard to see. This helps us learn about stars. It helps us learn about light. Can you see the light?
Early Reader · Change the reading level on the articleBeing invisible means you cannot be seen. Some things are clear like glass. Light goes right through them. This helps them hide. We can use light to hide things. It is like magic! Can you hide too?
Early Reader · Change the reading level on the articleSome salt has a special part. It helps our bodies stay well. It helps our brains work. This part is in many salts. We need it to be healthy. Do you like salt on your food?
Early Reader · Change the reading level on the articleSome tiny things have a charge. They can pull on each other. This helps us clean water. It can also help us find things in science. We use tools to sort them. Do you want to learn more?
Early Reader · Change the reading level on the articleTiny bits live inside everything. These bits are held tight. It takes energy to pull them away. This helps us learn about the world. Can you find tiny bits too?
Early Reader · Change the reading level on the articleIrène was a smart scientist. She studied how things work. She won a big prize for her work. Her work helped doctors help people. She was very brave. Do you like to learn new things?
Early Reader · Change the reading level on the articleSome things change color. They look like a rainbow. You can see this on soap bubbles. It also happens on bird feathers. It is very pretty to see. Do you see colors change?
Early Reader · Change the reading level on the articleThis is a special kind of iron. It can clean our water. It also helps make metal patterns. We use it to make things clean. It is very helpful. Do you like clean water?
Early Reader · Change the reading level on the articleSome things in soil are red or orange. They help plants get iron. This helps plants grow well. Doctors use it for people too. It helps keep your blood healthy. Can you find red rocks in the dirt?
Early Reader · Change the reading level on the articleSome rocks act like magnets. This black rock is called magnetite. It can pull on metal. We use it to make black paint. It is very cool! Do you have a magnet at home?
Early Reader · Change the reading level on the articleThis is a red powder. It comes from rocks in the ground. People use it to make steel. It can also make colors for glass. It helps make things shiny. Do you like the color red?
Early Reader · Change the reading level on the articleSome iron stuff is used in work. It helps dye cloth. It also helps clean up waste. It can even help make steel. This stuff is very useful. Do you like bright colors?
Early Reader · Change the reading level on the articleThis is a black powder. It is found deep in the Earth. It can be used for ink. It can even be used in makeup. It is not the same as rust. Do you like to draw with black ink?
Early Reader · Change the reading level on the articleSome things are black and solid. This can form in a hard egg. It makes the yolk look green. It happens when you cook it too long. Have you seen a green egg? It is a fun thing to find.
Early Reader · Change the reading level on the articleIron and air make something new. It can look like red rust. It can be used as paint. This paint has many colors. It can be red or black. We see it in the ground. Do you see red on old metal?
Early Reader · Change the reading level on the articleLight hits things all around us. It lands on the ground and trees. Sunlight is very strong on a clear day. This light helps things grow. It is a bright and busy world. Can you feel the sun's warmth?
Early Reader · Change the reading level on the articleSome things cannot be undone. A hot cup of coffee gets cold. It will not get hot again on its own. This happens in our world every day. It is a one-way trip. Can you think of something else that stays changed?
Early Reader · Change the reading level on the articlePeople use special names for colors. These names help everyone agree. Some names are for basic colors. Other names add more detail. This helps artists and scientists. It makes work easier for us. What is your…
Early Reader · Change the reading level on the articleSome things stay the same. Heat does not move in or out. No work is done. The energy stays just right. This helps us know how things move. It is like magic! Can you find things that stay the same?
Early Reader · Change the reading level on the articleIsidor Rabi was a great scientist. He studied tiny parts of things. He found new ways to see them. This helped doctors today. He won a very big prize. Do you like science too?
Early Reader · Change the reading level on the articleTiny bits can act like magnets. They like to point the same way. This helps things stay together. It is a way to see how magnets work. Do you like magnets?
Early Reader · Change the reading level on the articleSome tiny things are very strong. They stay together for a long time. Most big things fall apart fast. These special things might stay whole. They are like a safe island. Do you want to find them?
Early Reader · Change the reading level on the articleSmall parts make things. They use the same bits. But the bits are in new spots. This changes how they work. It is like building with blocks. Can you build something new?
Early Reader · Change the reading level on the articleTiny bits can change shape. They stay the same bits. But they move to new spots. This helps make food. It is like a puzzle. Can you see how they change?
Early Reader · Change the reading level on the articleMany living things make a special gas. Trees and plants make it too. It can even be in your breath! This gas helps plants stay safe in the heat. It is a very busy part of our world. Can you find a tree today?
Early Reader · Change the reading level on the articleTiny bits make up everything. Some bits are almost the same. They act like twins. They have different charges. This helps us know how they work. It is like a secret code for small things. Can you find tiny things?
Early Reader · Change the reading level on the articleSome things stay the same heat. This heat does not change. It stays very steady. This helps machines work well. It even helps tiny cells. Do you like things that stay the same?
Early Reader · Change the reading level on the articleSome things in our world are hard to separate. We can pull them apart. We do this to make fuel for power. It helps us make energy. Can you imagine how we do it?
Early Reader · Change the reading level on the articleCarbon is in everything. It is in plants and animals. Some kinds of carbon help us learn. We can use it to see how old things are. It is very cool! Can you find carbon in your food?
Early Reader · Change the reading level on the articleHydrogen is a tiny part of our world. It can be very light. Some kinds are a bit heavier. These help us make power. They are all very small. Can you find hydrogen in water?
Early Reader · Change the reading level on the articleMost air is made of nitrogen. It is all around us. Some parts of it are rare. These parts can help doctors. They help see inside your body. It is very cool! Can you feel the air?
Early Reader · Change the reading level on the articleOxygen is in the air. Most oxygen is very common. Some kinds are rare. Some can even change into other things. Scientists use them to learn about the past. They help us see inside the body. Can you find oxygen in the…
Early Reader · Change the reading level on the articleUranium is a special thing found in the ground. It can make energy. Some parts of it change over time. This helps us learn about our Earth. It is very interesting! Do you want to learn more?
Early Reader · Change the reading level on the articleScientists use special names for things. These names tell us what things are made of. It helps us not get mixed up. We can all use the same names. It is like a rule book. Do you like to follow rules?
Early Reader · Change the reading level on the articleScientists use special names for things. These names help us know what things are. One name tells us how a thing is made. This helps everyone talk the same way. It is like a secret code! Do you like codes?
Early Reader · Change the reading level on the articleIvar Giaever was a smart man. He studied how things work. He won a very big prize. This prize was for his work. He helped us learn about science. Do you like to learn new things?
Early Reader · Change the reading level on the articleJack was a smart man. He studied tiny things. He found a new part of our world. This helped us learn a lot. His work was very big. He won a great prize. Do you like to learn new things?
Early Reader · Change the reading level on the articleJames Cronin was a smart man. He studied tiny bits of the world. He found out how they work. 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 articleJames Franck was a smart man. He studied how tiny things work. He won a big prize for his work. He helped other people learn too. He was a very kind teacher. Do you like to learn new things?
Early Reader · Change the reading level on the articleA man named Van Helmont loved science. He studied how things grow. He watched a tree for five years. He wanted to see how it grew big. He even found a new word for air. Do you like to watch plants grow?
Early Reader · Change the reading level on the articleJaroslav Heyrovský was a smart man. He loved to study how things work. He made a new way to test things. This helped him win a big prize. He is even a name on the Moon! Do you like to learn new things?
Early Reader · Change the reading level on the articleJean-Baptiste Biot was a smart man. He studied the stars and light. He found rocks from space. These rocks fell from the sky. He also used a big balloon. He liked to learn new things. Can you look at the stars too?
Early Reader · Change the reading level on the articleA man named Poiseuille studied blood. He lived in France. He looked at how blood moves in tubes. This helps us learn about the body. He was a smart scientist. Can you think of how blood moves?
Early Reader · Change the reading level on the articleJean-Marie Lehn is a smart scientist. He studies tiny things. He made tiny cages. These cages hold small pieces. This helps make new medicine. He even plays music! Do you like science?
Early Reader · Change the reading level on the article