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 11 of 57
Some things are made of long chains. These chains are very big. They can be made by people. They can also be in nature. They make things like wood and silk. They are all around us! Do you see them?
Early Reader · Change the reading level on the articleSome things are made of long chains. These chains can be very big. They make things like plastic and rubber. These help us every day. We use them for many things. Do you see any plastic near you?
Early Reader · Change the reading level on the articleThis is a type of plastic. It can be used to make chairs. It is very strong. It can also take a lot of heat. This helps make things for you. Do you use things made of plastic?
Early Reader · Change the reading level on the articleThis is a type of plastic. It can be hard or soft. It makes pipes for water. It also makes window frames. We use it every day. Can you find it in your house?
Early Reader · Change the reading level on the articleSome tiny things are like twins. They look like electrons. But they have a different charge. They can even live in your body! When they touch an electron, they go poof. They turn into light. Do you want to learn more?
Early Reader · Change the reading level on the articlePotassium is a soft metal. It is shiny and silver. You can cut it with a knife. It helps our bodies work well. We find it in fruit and vegetables. Do you like eating fruit?
Early Reader · Change the reading level on the articleThis is a white solid. It helps make soft soap. It can also help make food. This stuff can be very strong. It must be used with care. Can you find soap in your house?
Early Reader · Change the reading level on the articleThis is a white powder. It helps plants grow. It also makes fireworks go pop! It can help make meat red. Do you like fireworks?
Early Reader · Change the reading level on the articleSome things hold energy inside. A spring holds energy when it is stretched. A ball holds energy when it is high up. This energy helps things move. It can make a ball fall. Can you find things that hold energy?
Early Reader · Change the reading level on the articleA pound helps us know how heavy things are. It is used in many places. One pound has 16 small ounces. This helps us buy food. It is a very old way to measure. Do you know how much you weigh?
Early Reader · Change the reading level on the articlePower is how fast we use energy. It can move things fast. It can help machines work. This helps us do many things. It is very cool! Can you see power at work?
Early Reader · Change the reading level on the articleThis is a special metal. It looks like silver. It can turn green in the air. This metal helps filter light. It is very interesting to see. Do you like the color green?
Early Reader · Change the reading level on the articlePushing things makes pressure. It happens when you push on a spot. A sharp knife has much pressure. This helps it cut food. A finger does not have much pressure. It cannot cut things. Can you feel pressure?
Early Reader · Change the reading level on the articleSome colors are very special. We call them primary colors. You can mix them to make new colors. They help make the pictures on your TV. They help make the art you paint. Can you find these colors today?
Early Reader · Change the reading level on the articleRules of nature stay the same. They work for everyone. You might see things a bit differently. But the rules do not change. This helps us learn about the world. It is very cool. Do you see things too?
Early Reader · Change the reading level on the articleA prism is a piece of glass. It can bend light. It can even turn white light into a rainbow. This helps us see colors. It is very cool to watch. Do you like rainbows?
Early Reader · Change the reading level on the articleThis is a very rare thing. It is hard to find. It can glow in the dark. People use it in special paint. It is very special to us. Do you like things that glow?
Early Reader · Change the reading level on the articlePropane is a special gas. It helps us cook food. We use it in grills. It can also heat homes. It works well in the cold. It is very useful! Do you use it to cook?
Early Reader · Change the reading level on the articleWater is all around us. It can be a liquid. It can be hard ice. It can even be a gas. Water helps all living things. We need it to live. Do you like to swim in water?
Early Reader · Change the reading level on the articleThis is a clear gas. It can be in the air. It helps make plastic things. We use plastic for food tubs. It is very useful. Can you find plastic near you?
Early Reader · Change the reading level on the articleThis is a rare metal. It is a shiny gray color. It is very hard to find in the ground. Scientists use it to learn new things. It is very special. Do you want to learn more?
Early Reader · Change the reading level on the articlePurple is a pretty color. It looks like red and blue mixed. Long ago, it was hard to make. Kings and queens loved to wear it. It was very special. Do you like the color purple?
Early Reader · Change the reading level on the articleTiny parts make up everything. These parts are very small. We use math to see them. This helps us learn how things work. It is like a secret map. Can you imagine tiny parts?
Early Reader · Change the reading level on the articleTiny bits make up everything. These bits stay stuck together. They use a strong force. This force works like glue. It helps hold things together. We are made of these bits! Do you like to learn about small things?
Early Reader · Change the reading level on the articleLight and tiny bits of matter talk to each other. They move and bump into things. This helps us know how they work. It is a big secret of our world. Do you like to learn how things work?
Early Reader · Change the reading level on the articleSome tiny bits of stuff stay linked. They act like one team. Even if they are far apart, they know what the other is doing. This helps us build new tools. It is like magic! Can you imagine that?
Early Reader · Change the reading level on the articleTiny things make up our world. They live in big, invisible fields. These fields are everywhere. They help small bits move and play. We use these ideas to learn how things work. Do you want to learn more?
Early Reader · Change the reading level on the articleSpace and tiny things are hard to study. We want to know how they work together. We use math to find out. This helps us learn about big stars. It also helps us learn about the start of everything. Can you imagine the…
Early Reader · Change the reading level on the articleTiny things can do magic. They can pass through walls. It is like a ball going through a hill. This helps our computers work. It is very cool! Can you imagine that?
Early Reader · Change the reading level on the articleTiny bits make up everything. These bits are very small. They stick together in groups. These groups make up the world. You are made of them too! Can you find something small?
Early Reader · Change the reading level on the articleEnergy travels in many ways. It can move like light. It can move like sound. Some kinds of energy are all around us. We cannot even see them! Can you find the light in your room?
Early Reader · Change the reading level on the articleSome tiny bits are very busy. They have one extra piece. This makes them want to move. They help make things like plastic. They even work inside your body. Do you want to learn more?
Early Reader · Change the reading level on the articleWe can find the age of old things. Scientists look at tiny parts in wood or bone. These parts go away as time passes. This helps us know how old they are. It is like a clock for history. Can you find old things?
Early Reader · Change the reading level on the articleRadio waves travel through the air. They carry signals to us. They help us talk on phones. They can even come from lightning. These waves move very fast. They are all around us. Can you find a radio?
Early Reader · Change the reading level on the articleRadon is a gas in the ground. It has no smell. You cannot see it. It can get into homes. It is good to test for it. Can you find a test kit?
Early Reader · Change the reading level on the articleA rainbow is a bright arc of color. It shows up in the sky. It needs rain and sun to work. The colors look very pretty. We can see them after a storm. Do you like to look for rainbows?
Early Reader · Change the reading level on the articleRamadan is a special month. Many people do not eat during the day. They eat a meal before the sun comes up. They eat again when the sun goes down. It is a time to be kind. Do you like to eat with your family?
Early Reader · Change the reading level on the articleThings change in small steps. One thing happens, then another. It is like a tiny dance. We cannot see the steps. But we can guess how they go. Do you like to see how things work?
Early Reader · Change the reading level on the articleRed is a bright color. You can see it in a sunset. It is also in many fruits. Some people see it as a sign of joy. Do you see red things today?
Early Reader · Change the reading level on the articleLight can bounce off things. It hits a surface and turns. This can make a mirror image. You see yourself in a mirror. It is like a ball bouncing back. Can you see a reflection today?
Early Reader · Change the reading level on the articleLight can bend. It bends when it moves through things like water. This can make a pen look bent. It can even make rainbows in the sky. It is fun to watch. Do you see light bend?
Early Reader · Change the reading level on the articleLight can bend when it moves. It bends when it hits water or glass. This can make a rainbow. It also helps us see with glasses. It is very cool! Can you see light bend?
Early Reader · Change the reading level on the articleFast things work in a new way. They move very, very fast. Light is the fastest thing of all. It has a speed limit. This helps us know how the world works. Can you imagine moving that fast?
Early Reader · Change the reading level on the articleA resistor helps control power. It can slow down the flow. It is in many machines. It helps things work well. It can even get warm. Do you see them in toys?
Early Reader · Change the reading level on the articleThings like to move in a certain way. Think about a swing. If you push at just the right time, the swing goes high. This is called resonance. It helps things move more. Can you find something that moves like that?
Early Reader · Change the reading level on the articleWater and air can move in many ways. Sometimes it moves in a smooth way. Other times it moves in a messy way. This helps us know how things will move. It helps us build planes. Can you see the air move?
Early Reader · Change the reading level on the articleLights make many colors. We use red, green, and blue light. These colors mix to make new ones. They can even make white light! Your TV uses these colors. Do you see them too?
Early Reader · Change the reading level on the articleThis is a very rare metal. It is a shiny gray color. It is hard to find in the ground. It helps jet engines work well. It stays strong when it gets hot. Can you find something shiny?
Early Reader · Change the reading level on the article