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 53 of 57
Try Science Lab activities about forces and motion, light, sound and electricity or matter and chemistry.
Scientists find new things in our world. Some things are new and do not have names. We use special rules to name them. This helps us talk about them. We can give them a real name later. Do you like new things?
Early Reader · Change the reading level on the articleWe use rules to measure things. These rules help us know how big or heavy things are. Some people use different rules. They help us buy things and build things. It is good to know how to measure. Do you like to…
Early Reader · Change the reading level on the articleTakaaki Kajita is a smart man. He studies tiny things in space. He found out that these things can change. This helped us learn about our world. He even won a big prize! Do you like to learn new things?
Early Reader · Change the reading level on the articleSome plants make a brown powder. This powder helps trees stay safe. It helps them fight bugs and fire. It can also help color cloth. People use it in some foods, too. Do you like tea?
Early Reader · Change the reading level on the articleA woman named Tapputi lived long ago. She made sweet smells for a king. She used flowers and oils. She mixed them with water. This helped her make perfume. It is fun to smell flowers. Do you like sweet smells?
Early Reader · Change the reading level on the articleTar is a dark, thick liquid. It comes from wood or coal. People use it to keep boats dry. It can also be used in food. It smells very strong. Have you ever seen something thick and black?
Early Reader · Change the reading level on the articleSome metals change color on top. This can look gray or black. It happens when metal meets air. This thin layer helps protect the metal. It can even look green! Do you see old coins with colors?
Early Reader · Change the reading level on the articleSome fruits have a sour taste. Grapes have this sourness. It is found in bananas too. It helps keep food fresh. It makes treats taste tangy. Do you like sour food?
Early Reader · Change the reading level on the articleA tiny part of our world is very hard to find. It has no charge. It moves through things easily. It is a big mystery for us. We want to learn more. Can you help us look?
Early Reader · Change the reading level on the articleSmall parts of life can change. A tiny part moves from place to place. This helps make things like food. It is like a game of musical chairs. It helps us stay healthy. Can you see how it moves?
Early Reader · Change the reading level on the articleTeal is a pretty color. It is a mix of blue and green. A small bird has this color on its head. You can see it in ice too. Do you like this color?
Early Reader · Change the reading level on the articleDoctors use a special tool to see inside you. It helps them find where you are sick. It sends out tiny light signals. A camera sees these signals. This helps doctors help you. Can you imagine seeing inside your body?
Early Reader · Change the reading level on the articleImagine moving without walking. You could go from here to there fast. You do not travel the space in between. We see this in fun stories. It is a big idea. Do you think it could work?
Early Reader · Change the reading level on the articleScientists made a new thing. It is a tiny part of matter. It has a special name. It is named for Tennessee. This new thing is very new. Do you like science?
Early Reader · Change the reading level on the articleA rope can feel a pull. This pull is called tension. It happens when things pull on a string. It can stretch a rope out. It helps hold things up. Do you see things pulling on ropes?
Early Reader · Change the reading level on the articleSpecial waves are all around us. They can see through thin things. They can look through paper or wood. These waves can even see inside our bodies. They help doctors see us safely. Do you want to see more?
Early Reader · Change the reading level on the articlePlants make many special oils. These oils have strong smells. Some help plants stay safe. They can also smell very nice. We use them in soaps and perfumes. Do you smell flowers in a park?
Early Reader · Change the reading level on the articlePlants make many special things. They make scents like cinnamon. They make colors like red tomatoes. These things help the plants. They also make the air smell good. Do you like the smell of plants?
Early Reader · Change the reading level on the articleWe use a tiny model to learn. It is like a small dot. It does not change how things move. This helps us see how big things work. It makes hard things easy to know. Do you like to learn?
Early Reader · Change the reading level on the articleA man had a big idea. He wanted to know how space works. He looked at the stars and the sun. He looked at the planet Mercury. His ideas were right! Do you like to look at the stars?
Early Reader · Change the reading level on the articleLong ago, people put lead in gas. It helped cars run well. But the lead was not safe. It could hurt our brains. Now, we use clean gas instead. This helps keep us healthy. Do you like clean air?
Early Reader · Change the reading level on the articleThis is a clear oil. It helps kill tiny bugs. It can also help some people feel strong. It breaks down fast in the world. We must be very careful with it. Can you find tiny bugs in a garden?
Early Reader · Change the reading level on the articleSome things grow in special shapes. They look like tall boxes. The bottom is a square. The sides go up high. These shapes are in many rocks. Do you see any shapes like this?
Early Reader · Change the reading level on the articleTiny things can make special shapes. One shape has a middle part. Four small parts sit at the corners. It looks like a little pyramid. This shape helps things stay together. Can you find this shape in nature?
Early Reader · Change the reading level on the articleThis is a clear liquid. It helps make stretchy clothes. It can also clean tools. It works like a strong soap. We must be careful with it. Do you like science?
Early Reader · Change the reading level on the articleTiny bits make up our world. Most bits come in groups of two or three. Some bits come in a group of four. These tiny groups are very special. They help us learn how things work. Can you imagine tiny bits?
Early Reader · Change the reading level on the articleThis is a white powder. It mixes well with water. It helps make things like soap and skin cream. It can even help clean old metal. It is a very useful thing. Do you use soaps every day?
Early Reader · Change the reading level on the articleA man named Richard Feynman taught science. He spoke to many students. He wrote books about how things work. These books help us learn. You can read them online. Do you like to learn new things?
Early Reader · Change the reading level on the articleTheodore was a smart man. He studied how things fly. He helped us learn about space. His work helps planes fly high. He was a great teacher too. Do you like to look at the stars?
Early Reader · Change the reading level on the articleTheodor is a smart man. He studies light. He made a tool to measure light. It works like a ruler. This helps us learn about our world. He won a big prize for his work. Do you like to learn?
Early Reader · Change the reading level on the articleSome people use math to study stuff. They look at how tiny bits move. This helps us learn how things work. It can help us make new things. It is very cool. Do you like math?
Early Reader · Change the reading level on the articleWe can mix things to separate them. This helps us get what we need. It works in many steps. It helps us clean things up. It is very cool. Do you want to see more?
Early Reader · Change the reading level on the articleScientists want to find one big rule. This rule would explain everything in space. It would show how all things work. It would help us know the world. We are still looking for it. Do you want to help find it?
Early Reader · Change the reading level on the articleHeat moves from hot things to cold things. It travels when things touch. A hot pan on a stove gets warm. This happens because tiny parts bump into each other. Heat helps things stay warm. Can you feel heat on your skin?
Early Reader · Change the reading level on the articleHeat moves through things. Some things let heat move fast. Metals do this well. Other things keep heat in. This helps keep you warm. Do you feel heat move?
Early Reader · Change the reading level on the articleHeat can change things. It can break things down. Some things break when they get hot. This can even change a fingerprint. It is very interesting to see. Can you feel heat on your skin?
Early Reader · Change the reading level on the articleHeat is a kind of energy. It can move from one thing to another. It can also stay inside a thing. This helps things stay warm. It is all around us. Can you feel the warmth?
Early Reader · Change the reading level on the articleThings like to be the same. If one thing is hot and one is cold, heat moves. It moves from the hot thing to the cold thing. Soon, they both feel the same. This is called being even. Do you feel warm or cold today?
Early Reader · Change the reading level on the articleThings grow when they get hot. This can happen to a metal rod. The heat makes the tiny parts move more. This makes the whole thing get bigger. It can even happen to a bridge. Do you feel warm in the sun?
Early Reader · Change the reading level on the articleTiny bits of stuff are always moving. They shake and jump around. When things get hot, they move more. When things get cold, they move less. This shaking helps things change. Can you feel things move?
Early Reader · Change the reading level on the articleEverything warm sends out heat. It moves through the air. The sun sends heat to Earth. This helps keep us warm. It is a very big job. Can you feel the sun's heat?
Early Reader · Change the reading level on the articleSometimes things get too hot. Heat can make things even hotter. This happens very fast. It can cause a big pop or fire. This is a tricky loop. Can you stay cool?
Early Reader · Change the reading level on the articleSome things make heat. Other things take heat away. This helps us study heat. It tells us how things change. We can learn about heat and ice. It is very cool! Do you like to feel heat?
Early Reader · Change the reading level on the articleSome things mix in special ways. A mix can act differently than we think. This helps us know how much is really there. It is like a secret way to measure. Can you find things that mix? We can learn more soon.
Early Reader · Change the reading level on the articleHeat and power are linked. We can use heat to do work. It can lift a heavy weight. This helps us build many things. It is all part of how things move. Do you like to see how things work?
Early Reader · Change the reading level on the articleThings can be very still. Heat stops moving from place to place. Everything stays the same. This helps things stay calm. It is a quiet state. Do you like quiet things?
Early Reader · Change the reading level on the articleThings are made of tiny bits. When there are many bits, things act the same. We can see how they move. This helps us know how they work. It is a big, busy world. Can you see the tiny bits?
Early Reader · Change the reading level on the articleThings have energy inside them. This energy helps them do work. It can also make heat. We use it to see how things change. It helps us understand how things mix. Can you feel heat? It is all around us.
Early Reader · Change the reading level on the article