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 50 of 57
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Shin'ichirō Tomonaga was a smart man. He studied how tiny things work. He won a big prize for his work. This prize is very special. He helped us learn about our world. Do you like to learn new things?
Early Reader · Change the reading level on the articleA shock is a sudden hit. It can come from a drop. It can come from a big bang. A shock might break a glass. It might bend a metal cup. We use soft pads to stop it. Have you ever felt a big bump?
Early Reader · Change the reading level on the articleA big wave can move very fast. It moves faster than sound. This makes a loud snap or crack. It can happen when a plane flies fast. It can even happen in a big blast. Have you ever heard a loud boom?
Early Reader · Change the reading level on the articleA short ton is a way to measure weight. It is used in the United States. One ton is 2,000 pounds. This helps us know how heavy things are. It is a big amount! Can you think of something very heavy?
Early Reader · Change the reading level on the articleWe use special ways to measure things. We use them for time and length. We also use them for weight. These ways help us all work together. They make science work well. Do you like to measure things?
Early Reader · Change the reading level on the articleTiny parts stick to a main line. These parts help things work. They can change how things act. They help tiny bits fold the right way. It is like a small branch on a tree. Can you find a branch on a tree?
Early Reader · Change the reading level on the articleTiny bits hold together very well. They use a strong hold. This hold is like a tight hug. It helps things stay in one piece. It is very strong. Can you see how they stick?
Early Reader · Change the reading level on the articleSome tiny bits are very hard. They can help cut things. They are even in some vests. This helps keep people safe. It is a cool thing! Do you like hard things?
Early Reader · Change the reading level on the articleSand is made of a special thing. It is in many places. It can also make glass. We use it to build big homes. It helps make things we use every day. Do you see sand at the beach?
Early Reader · Change the reading level on the articleThis is a white solid. It can go pop very fast. It can pop if it hits something. It can even pop in bright light. It is very strong. We must be very careful. Do you like to see things pop?
Early Reader · Change the reading level on the articleSilver is a shiny color. It looks like gray metal. It can shine in the light. Some trees and fish are silver too. We see it in many places. Do you like shiny things?
Early Reader · Change the reading level on the articleThis is a bright yellow salt. It can help make rain fall. It is also used to keep things clean. Some parts of it look grey. It can change color in the light. Do you like the color yellow?
Early Reader · Change the reading level on the articleThis is a special silver salt. It can make things change color. It can even stain your skin. It helps make pretty glass colors. It is used to help fix flowers. Do you like shiny silver?
Early Reader · Change the reading level on the articleThis is a black solid. It looks like metal. It can blow up very fast. It can even pop if you touch it. We must be very careful with it. Do you think it is amazing?
Early Reader · Change the reading level on the articleSimon was a smart man. He worked with big machines. He helped find tiny bits of our world. This work won him a big prize. It helps us learn how things work. Do you like to learn?
Early Reader · Change the reading level on the articleTiny bits join together. They share small parts to stay close. This helps them stick. It makes things like water. This is how many things are made. Can you find things made this way?
Early Reader · Change the reading level on the articleSome air is very busy. It is a special kind of gas. This gas can change things. It can even help doctors. It is very strong. Can you imagine a busy gas?
Early Reader · Change the reading level on the articleGeorge was a smart man. He liked to study waves. He studied how water moves. He also studied light. His work helps us learn. Do you like to learn new things?
Early Reader · Change the reading level on the articleSize is how big things are. Some things are huge. Some things are tiny. We use our eyes to see size. We can also use our hands to feel. Can you find something small near you?
Early Reader · Change the reading level on the articleScientists use lines to draw tiny things. These lines show how small parts join together. It is like a simple map. The lines help us see how they work. This helps us learn about our world. Can you see the lines?
Early Reader · Change the reading level on the articleSky blue is a pretty color. It looks like the bright sky. It is a light blue shade. You can see it on sunny days. It makes the world look bright. Do you like this color?
Early Reader · Change the reading level on the articleLiquid moves inside a container. This is called slosh. It happens in ships and rockets. It can make things shake or tilt. We must study it to stay safe. Do you see water move in a cup?
Early Reader · Change the reading level on the articleA slug is a way to measure weight. It is not a small animal. It is a name for a heavy thing. This helps us know how much stuff is in an object. It is a very big amount. Can you imagine something that heavy?
Early Reader · Change the reading level on the articleTiny parts swap places. One part leaves. A new part comes in. This helps make new things. It happens in steps. It is very cool! Do you like science?
Early Reader · Change the reading level on the articleTiny bits of stuff swap places. One part comes in. Another part leaves. This happens all at once. It is like a quick trade. It helps make new things. Can you see how they move?
Early Reader · Change the reading level on the articleLight can bend. It bends when it moves through things. It moves through air and water. This helps us see things clearly. It is a neat trick of light. Can you see light bend?
Early Reader · Change the reading level on the articleSNI can mean many things. It can be a way to name groups. It can be a way to talk on computers. It is a name for some big groups. It helps us know what things are. Do you know any other names?
Early Reader · Change the reading level on the articleMost glass is made of sand. It is used for windows. It is also used for jars. We use it for food and drinks. It is very helpful. Do you see glass in your home?
Early Reader · Change the reading level on the articleSome salts can make heat. They are in hand warmers. This helps keep you warm. You can use them again and again. It is like magic! Do you like warm hands?
Early Reader · Change the reading level on the articleSome cars use a special salt. It helps the air bag grow fast. This happens in a crash. It keeps us safe. It is very strong. Do you have an air bag in your car?
Early Reader · Change the reading level on the articleSome white powder helps our food stay good. It stops bad things from growing in juice. It can also be in medicines. This helps keep things safe for us. It is very useful. Do you like fruit juice?
Early Reader · Change the reading level on the articleThis is a white powder. It looks like tiny salt grains. It helps make paper and bright dyes. It can even help make medicine. We use it to make things new. Do you like bright colors?
Early Reader · Change the reading level on the articleThis is a white salt. It looks like the salt we use. People use it in pools. It helps keep water clean. It can be bad if you take too much. Do you like swimming in pools?
Early Reader · Change the reading level on the articleThis is a bright yellow powder. It comes from rocks in the ground. It helps make things out of metal. It can also help color cloth. We must be very careful with it. It can hurt our eyes. Do you like the color yellow?
Early Reader · Change the reading level on the articleThis is a white salt. It can dissolve in water. It helps us get gold from rocks. This salt is very dangerous to touch or eat. We must be very careful with it. Can you imagine a white salt that finds gold?
Early Reader · Change the reading level on the articleThis salt helps make things. It comes from rocks in the ground. We use it to make leather. It is used in many ways. We must be very careful with it. It can be bad for us. Do you like learning about rocks?
Early Reader · Change the reading level on the articleThis is a white powder. It can help clean things. It helps fix stained clothes. It can even help make photos. This powder is very useful. Do you like clean clothes?
Early Reader · Change the reading level on the articleThis is a special salt. It looks grey. It can help make new things in a lab. It can even hold gas for cars. We must be very careful with it. It can catch fire. Have you ever seen a lab?
Early Reader · Change the reading level on the articleThis is a liquid called bleach. It helps clean things. It can make clothes bright. It also kills germs. Be careful with it. Do not mix it with other cleaners. Have you seen a bottle of bleach?
Early Reader · Change the reading level on the articleThis is a special salt. It looks like clear crystals. It can help make strong glass. It also helps plants grow. We use it in many ways. Can you find something clear like this?
Early Reader · Change the reading level on the articleThis is a clear salt. It can melt in water. It comes from a special metal. It helps us learn about how our bodies work. It is very neat to see. Do you like to learn about science?
Early Reader · Change the reading level on the articleThis is a white solid. It is used to make glass. It helps the glass melt well. It is part of many things. We can see it in glass. Do you like to look through glass?
Early Reader · Change the reading level on the articleSome white salt is found on Mars. It can melt in water. This salt is very special. It helps us learn about space. We can find it in the red dust. Do you want to see Mars?
Early Reader · Change the reading level on the articleThis is a dark purple salt. It can melt very fast. It can soak up water from the air. It helps clean dirty water. It also helps clean the soil. It is a very strong tool. Do you like the color purple?
Early Reader · Change the reading level on the articleThis is a yellow solid. It is made with air. It can help make paper. It even helps people in submarines. It can make the air we breathe. It is very useful. Do you like to learn about science?
Early Reader · Change the reading level on the articleThis is a special salt. It can look like flakes. It can also look like small rocks. It helps make the paper you use. It even helps make colors for clothes. Can you find paper near you?
Early Reader · Change the reading level on the articleSome things are soft. They can change shape. You can squish them. Soap bubbles are soft. Even your body is soft. It is fun to touch soft things. What is your favorite soft thing?
Early Reader · Change the reading level on the articleTiny bits stay in a liquid. They do not sink to the bottom. You can see them in ink. They are also in mud. This helps things stay mixed. It is very cool to see. Do you see this in paint?
Early Reader · Change the reading level on the article