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 39 of 57
Waves move energy through things. They can move through water. They can move through air too. Sound is a type of wave. Waves help us hear things. Can you feel a wave? It is a fun thing to watch.
Early Reader · Change the reading level on the articleScientists made a new thing. It is a tiny piece of matter. It is named for a smart woman. It does not stay for long. It goes away very fast. Can you find it?
Early Reader · Change the reading level on the articleSome things change from hard to wet. This is called melting. Heat makes this happen. Ice turns into water when it gets warm. This helps us stay cool. Do you like ice in your drink?
Early Reader · Change the reading level on the articleMelvin Schwartz was a smart man. He studied how the world works. He found new things in science. He won a very big prize. This prize helped people learn. Do you like to learn new things?
Early Reader · Change the reading level on the articleA membrane is like a thin wall. It lets some small things through. It stops other things. This helps make water safe to drink. We use them every day. Can you find a filter at home?
Early Reader · Change the reading level on the articleSome rocks are bright red. They are made of two things. This red rock is found in nature. It can be used to make paint. It is a very pretty color. Can you find something red today?
Early Reader · Change the reading level on the articleSome tiny things look the same. They have a mirror side. The two sides match up. It is like your own hands. This helps them stay still. Do you see the match?
Early Reader · Change the reading level on the articleSome things are very small. They are not big like a ball. They are not tiny like one speck. They are in the middle. These small things act in new ways. Do you want to see them?
Early Reader · Change the reading level on the articleBig ships stay upright in the water. They do not tip over easily. This helps keep the people safe. A good ship stays steady on the waves. Do you like to ride on a boat?
Early Reader · Change the reading level on the articleSome gas can act like metal. It happens when things get very tight. This might be inside big planets. It helps make a planet's power. It is a big mystery. Do you like space?
Early Reader · Change the reading level on the articleSome things can turn into metal. This happens with a lot of weight. Big weight can squeeze things. It can change how they act. It is a big surprise. Can you imagine a gas turning into metal?
Early Reader · Change the reading level on the articleMetal and special parts touch. This helps electricity move. It makes our tools work. We use these in many things. It is very cool! Do you like science?
Early Reader · Change the reading level on the articleSome things can stay still for a while. A ball can sit in a small dip. A small push will not move it. A big push will make it roll. This can happen with sand or snow too. Can you find things that stay still?
Early Reader · Change the reading level on the articleThis is a clear gas. It smells like bad fish. It helps make many things. It helps make medicine. It helps make tools. It is used in big factories. Can you imagine that smell?
Early Reader · Change the reading level on the articleSome plants make a sweet smell. It smells like mint. It can taste like root beer. It helps plants talk to each other. It can even help plants stay safe. Do you like the smell of mint?
Early Reader · Change the reading level on the articleWe use a way to measure speed. It tells us how fast things go. One part is how far you move. The other part is time. It helps us know how fast we move. It is very good for science. Do you like to go fast?
Early Reader · Change the reading level on the articleThings can speed up fast. This is how we measure it. It tells us how much speed changes. It helps us see how things move. It is a big part of science. Do you like to go fast?
Early Reader · Change the reading level on the articleA man named Michael studied air. He found a part of air that helps us live. This part is very special. It helps our bodies stay well. He was a great thinker. Do you like to learn new things?
Early Reader · Change the reading level on the articleMichio Kaku studies how the world works. He is a science teacher. He writes many books. He also talks on TV. He helps us learn about space. Do you like science too?
Early Reader · Change the reading level on the articleTiny bits move in many ways. They can go one way. They can also go back. This happens in a balance. It stays the same both ways. This helps things stay calm. Do you like to go back and forth?
Early Reader · Change the reading level on the articleEverything is made of tiny parts. These parts move in many ways. Each way is a special state. We can see the big picture. But the small parts are busy. Can you see the tiny parts?
Early Reader · Change the reading level on the articleWe use waves to see tiny things. These waves help us see how small bits spin. They show us how bits are shaped. This helps us learn about the world. It is like a secret map. Can you see the tiny spins?
Early Reader · Change the reading level on the articleMidnight is when one day ends. It is also when a new day starts. It is the middle of the night. This time helps us know the date. It is a very special moment. Do you stay up late?
Early Reader · Change the reading level on the articleThis tells us how fast things go. It counts miles in one hour. You see it on road signs. It helps cars stay safe. It is used in the US. Do you know how fast you can run?
Early Reader · Change the reading level on the articleA millennium is a long time. It is one thousand years. It is much longer than your life. It helps us count big years. It is a very big number! Can you think of a big number?
Early Reader · Change the reading level on the articleTiny bits make up crystals. These bits form neat rows. We use numbers to name the rows. These numbers help us see the shapes. It is like a map for tiny things. Can you find a shape?
Early Reader · Change the reading level on the articleWe use a special way to measure pressure. Doctors use it to check your blood. It tells them how your body works. It helps you stay well. Do you want to learn more?
Early Reader · Change the reading level on the articleScientists think of new tiny parts. These parts might be hidden. They could help explain space. They might even be dark matter. We look for them with big machines. Do you want to find them too?
Early Reader · Change the reading level on the articleSpace and time are joined together. They work as one big thing. This helps us see how things move. It shows how light travels. It is a big part of science. Can you imagine space and time as one?
Early Reader · Change the reading level on the articleThis is a mix of metals. It helps make tiny sparks. You can find it in some lighters. It works to start a flame. It is very useful. Do you like seeing sparks?
Early Reader · Change the reading level on the articleSome things mix well. Water and some liquids mix into one. Other things do not mix. Oil and water stay apart. This can look like bright colors. Can you see oil in water?
Early Reader · Change the reading level on the articleTiny bits of metal fit together. They do not always line up. Some bits tilt one way. Some bits tilt another way. This helps us know how they sit. Can you see how they fit?
Early Reader · Change the reading level on the articleWe use tools to measure things. One tool tells us how long things are. One tool tells us how heavy they are. One tool tells us how much time passes. This helps us all work together. It is a smart way to learn. Can…
Early Reader · Change the reading level on the articleScience helps us learn how things work. Some things are very fast. Some things are very small. We study these big and tiny things. It is very cool to learn. Do you want to see more?
Early Reader · Change the reading level on the articleScientists use computers to study tiny things. These things are parts of a molecule. We can use math to see how they work. This helps us learn about our world. It is very cool! Do you like science?
Early Reader · Change the reading level on the articleNew patterns can pop up. Put two patterns on top. They do not match perfectly. Now you see a new shape. It can look like lines or waves. It is fun to find! Can you see one?
Early Reader · Change the reading level on the articleWe use math to mix things. We can mix salt into water. We count how much salt is in the water. This helps us know the mix. It stays the same when it is hot or cold. Do you like to mix things?
Early Reader · Change the reading level on the articleWe can mix things in water. Some mixes have a lot of stuff in them. Other mixes have just a little bit. This helps us know how strong a mix is. It is a way to measure. Do you like to mix things?
Early Reader · Change the reading level on the articleTiny bits move around in water or air. They like to spread out. They move from a crowded spot to a space with more room. This helps things mix together. It helps your body work. Can you see things mix?
Early Reader · Change the reading level on the articleComputers can show how tiny bits move. These bits are too small to see. The computer makes a map of them. It shows how they dance and bump. This helps us learn about the world. Can you imagine tiny bits dancing?
Early Reader · Change the reading level on the articleTiny bits make up everything. They join to make shapes. Some shapes are straight lines. Some look like a bent V. These shapes help things work. Can you see shapes in the world?
Early Reader · Change the reading level on the articleScientists use pictures to see tiny things. These tiny things are called molecules. They are too small to see with eyes. Pictures help us see how they work. It is like a map for small bits. Can you imagine something…
Early Reader · Change the reading level on the articleScientists use small toys to show tiny things. These toys look like balls and sticks. The balls show tiny bits of matter. The sticks show how they stay together. They help us learn how things work. Do you like to…
Early Reader · Change the reading level on the articleScientists use computers to see tiny things. These tiny things are called molecules. They are too small to see with your eyes. Computers help us see how they move. This helps us make new medicines. It is like a tiny…
Early Reader · Change the reading level on the articleSmall things called molecules are all around us. They are always moving. They spin and shake. They do not stay still. This helps us learn how they work. It is very cool! Do you like to move too?
Early Reader · Change the reading level on the articleTiny bits join together on their own. They do not need help. They make shapes like rings. This helps living things grow. It even helps geckos climb walls. Nature is so smart! Can you see tiny things?
Early Reader · Change the reading level on the articleA mix has many parts. One part can be small. One part can be big. We count the parts in a mix. This tells us how much is there. It helps us make new things. Can you find a mix?
Early Reader · Change the reading level on the articleSome rocks are very slippery. This dark rock is called molybdenite. It helps things slide easily. It is used in big engines. It can even help make tools. Do you like things that slide?
Early Reader · Change the reading level on the article