Capacitor
A cap stores power. It holds tiny bits of energy. It helps things like radios work. This part is in many tools you use. It can even be in the sky! Can you find one in your house?
Early Reader · Change the reading level on the articleTechnology articles — Page 4
Explore inventions, engineering, computing and the tools people build to solve problems. Choose an article below; its reading controls let you move between the available levels.
4,107 public articles · Page 4 of 86
Cargo
Cargo is stuff that moves. It travels on ships. It travels on planes. It travels on big trucks. It even travels on trains. This helps get things to you. What is your favorite thing to buy?
Early Reader · Change the reading level on the articleCargo ship
Big ships carry things across the sea. They move food and toys to us. These ships can be very large. They help people all over the world. It is a big job! Do you like big ships?
Early Reader · Change the reading level on the articleCarl Benz
Carl Benz made the first car. It had a motor inside. This helped it move without horses. Many people drive cars today. We can go far in them. Do you like cars?
Early Reader · Change the reading level on the articleCarlos Slim
Carlos Slim is a man from Mexico. He owns many big companies. He helps people by giving money to good causes. He is very good at business. He learned a lot from his dad. Do you want to be a businessman too?
Early Reader · Change the reading level on the articleCarpentry
Carpenters work with wood. They cut and shape it. They can build big houses. They can also make chairs. This job helps us have homes. Do you like to build things?
Early Reader · Change the reading level on the articleCarriage
A carriage is a ride for people. It has wheels. Horses pull it along. Rich people used them a long time ago. Now, they are for parades. Do you like horse rides?
Early Reader · Change the reading level on the articleCart
A cart has wheels. People or animals pull them. A horse can pull a cart. You can use one to move things. It helps us carry a lot. Do you like carts?
Early Reader · Change the reading level on the articleCatapult
A catapult is a big machine. It throws things very far. It can toss heavy stones. People used them a long time ago. They help move things fast. Can you imagine a giant stone flying?
Early Reader · Change the reading level on the articleCavity magnetron
A magnetron makes waves. These waves help cook food. It works in your kitchen. It is in a microwave oven. It is very useful. Do you use one?
Early Reader · Change the reading level on the articleCeiling
A ceiling is above you. It covers the top of a room. It can hide pipes or wires. Some ceilings have art on them. We look up to see them. Do you like to look up?
Early Reader · Change the reading level on the articleCelestial navigation
You can find your way with stars. Look at the Sun or Moon. See how high they are in the sky. This helps you know where you are. It works on land and at sea. Can you find the stars tonight?
Early Reader · Change the reading level on the articleCement
Cement is a special powder. It helps things stick. We mix it with water and sand. It turns hard like a rock. It helps build big walls. Can you see big buildings? They use it too!
Early Reader · Change the reading level on the articleCentral heating
One machine makes heat for a whole house. It can use wood or power from a plug. The heat moves through pipes or air. This keeps every room warm and cozy. It helps us stay warm in winter. Do you have a heater at home?
Early Reader · Change the reading level on the articleCentrifuge
A machine spins very fast. It can pull things apart. It can separate milk from cream. This helps us study blood. It is a very cool tool. Do you want to see it spin?
Early Reader · Change the reading level on the articleChain
A chain is made of many parts. Each part is a ring. The rings link to each other. They hold things together. This helps us move big things. It is a strong tool. Can you see a chain?
Early Reader · Change the reading level on the articleChain mail
Chain mail is made of small metal rings. These rings are all linked together. It makes a coat for a person to wear. It helps keep them safe. People still use it today. Do you want to see it?
Early Reader · Change the reading level on the articleChainsaw
A chainsaw is a tool for cutting. It uses a moving chain. The chain has sharp teeth. It can cut big trees. It helps people work. Do you want to see it work?
Early Reader · Change the reading level on the articleCharge-coupled device
A tiny chip takes pictures. It catches light to make a photo. This helps cameras work well. It is used in big science tools. We use it to see things. Do you like taking photos?
Early Reader · Change the reading level on the articleCharles Algernon Parsons
Charles was a smart man. He made a new kind of engine. It helped big ships go fast. It also made much more power. This helps us have light today. Do you like fast boats?
Early Reader · Change the reading level on the articleCharles K. Kao
Charles Kao helped us talk far away. He used thin glass to send light. This light carries information to us. It helps the internet work fast. We can see things on screens. He was a very smart man. Do you like using…
Early Reader · Change the reading level on the articleCharles Lindbergh
Charles Lindbergh was a pilot. He flew a plane across the sea. He flew all alone for a long time. This helped people fly far away. It was a big deal. Do you like planes?
Early Reader · Change the reading level on the articleChemical industry
Many things are made in big shops. They use oil and air to make stuff. They make toys and soap and even food for plants. This helps us every day. It is very busy work. Do you like toys?
Early Reader · Change the reading level on the articleChemical plant
Big buildings make new things. They take stuff and change it. This helps make things we use. It is a very big job. Do you want to see more?
Early Reader · Change the reading level on the articleChisel
A chisel is a tool. It has a sharp edge. You can use it to cut wood or stone. You can push it with your hand. You can also hit it with a hammer. It helps us make things. Do you want to try making something?
Early Reader · Change the reading level on the articleCircuit breaker
A circuit breaker keeps us safe. It stops too much power. This helps stop fires. You can flip a switch to fix it. It is very helpful. Do you use power at home?
Early Reader · Change the reading level on the articleCircuit design
People make plans for tiny parts. These parts make things work. They go in your TV. They help us every day. It takes a lot of work. Can you find a tiny part?
Early Reader · Change the reading level on the articleClamp (tool)
A clamp is a tool. It holds things tight. It stops things from moving. This helps us fix things together. It can be used for wood. We use them to help. Do you like to build things?
Early Reader · Change the reading level on the articleClothes dryer
A dryer helps us dry clothes. It takes wet clothes from the wash. The machine uses warm air. It spins the clothes around. This makes them dry and soft. Do you like warm clothes?
Early Reader · Change the reading level on the articleClothing industry
Many people make our clothes. They use soft yarn. They turn yarn into cloth. Then they sew the cloth. This makes shirts and pants. We wear them every day. Do you like your clothes?
Early Reader · Change the reading level on the articleClub (weapon)
A club is a short stick. It is often made of wood. People use it as a tool. Some people use it to stay safe. It can be small or big. Can you find a stick?
Early Reader · Change the reading level on the articleCluster munition
A big bomb can break open. It lets out many small bombs. These small bombs fall over a wide area. They can be very dangerous to people. Some small bombs do not pop. This can hurt people long ago. Can you see why they…
Early Reader · Change the reading level on the articleCMYK color model
Printers use four colors. They use blue, pink, and yellow. They also use black ink. This helps make dark colors. It also makes words clear. We see these colors in books. Do you see colors in your books?
Early Reader · Change the reading level on the articleCoca-Cola
Coke is a dark soda. It is sold all over the world. Many people drink it every day. It is a very famous drink. Do you like soda?
Early Reader · Change the reading level on the articleCombine harvester
A combine is a big machine. It helps farmers get food. It picks up seeds from the field. It can pick up corn or wheat. This makes work much easier. Do you like corn?
Early Reader · Change the reading level on the articleCommunications satellite
Space tools help us talk. They stay high in the sky. They send signals to Earth. This helps us use the phone. It also helps us watch TV. It is very cool! Do you like space?
Early Reader · Change the reading level on the articleComposite material
We make new things by mixing stuff. We can mix two things to make one. It can be strong or light. It can even be used for big planes. This helps us build many things. Do you see things made like this?
Early Reader · Change the reading level on the articleComputational complexity theory
Computers do many tasks. Some tasks are hard. They take a lot of time. They might use a lot of space. We study how hard they are. This helps us know what computers can do. Can you think of a hard task?
Early Reader · Change the reading level on the articleComputer architecture
A computer has many parts. These parts work together. They help the computer run. This helps you play games. It also helps you learn. It is like a plan. Do you like computers?
Early Reader · Change the reading level on the articleComputer file
A computer file holds data. It can hold a picture. It can hold a song. It can hold a story. You can name your files. You can change them too. Do you have files on your tablet?
Early Reader · Change the reading level on the articleComputer graphics
Computers can make art. They make pictures on screens. You see them in movies. You see them in games. They help us see things. It is very cool. Do you like computer games?
Early Reader · Change the reading level on the articleComputer hardware
Hardware is the real parts of a computer. It is the parts you can touch. A mouse and a screen are hardware. These parts help you use the machine. Do you have a computer at home?
Early Reader · Change the reading level on the articleComputer keyboard
A keyboard helps you talk to computers. It has many small buttons. You press the buttons to type. You can type letters and numbers. It helps you write things. Do you like to type?
Early Reader · Change the reading level on the articleComputer monitor
A monitor is a screen. It shows us pictures. It also shows us words. We use it to see what the computer is doing. It helps us play and work. Do you like to look at screens?
Early Reader · Change the reading level on the articleComputer mouse
A mouse helps you use a computer. You move it on a desk. It moves a dot on the screen. This helps you pick things. It is fun to use. Do you use a mouse?
Early Reader · Change the reading level on the articleComputer network
Computers can talk to each other. They use wires or radio waves. This helps them share things. You can use it to send mail. It is very helpful. Do you use a network?
Early Reader · Change the reading level on the articleComputer security
We use computers every day. They keep our secrets safe. Some people try to break them. They want to steal things. We must keep them safe. Do you use a computer?
Early Reader · Change the reading level on the articleComputer simulation
Computers can act like a pretend world. They use math to show how things work. This helps us see the weather or tiny parts of life. It can help us learn new things. Can you think of a pretend world?
Early Reader · Change the reading level on the article