Sieve
A sieve is a tool with holes. It helps us sort things. It can pick out big rocks from sand. It can also help in the kitchen. It makes flour soft and smooth. Can you find one in your home?
Early Reader · Change the reading level on the articleTechnology articles — Page 72
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 72 of 86
Try related engineering and scientific-investigation activities in Science Lab.
Sikorsky UH-60 Black Hawk
The Black Hawk is a big helicopter. It has two engines. It can carry many people. It helps the army do work. It is very strong. Do you like helicopters?
Early Reader · Change the reading level on the articleSilly Putty
Silly Putty is a fun toy. It can bounce like a ball. It can also flow like a slow liquid. You can stretch it in your hands. It can even float in water. Do you want to play with it?
Early Reader · Change the reading level on the articleSilver mining
Silver is a shiny metal. People find it in the ground. It is often mixed with other rocks. We use it for coins. It is very special. Can you find something shiny?
Early Reader · Change the reading level on the articleSimple Mail Transfer Protocol
Computers use a special way to send mail. This helps your messages move fast. It sends mail from one place to another. This is how we talk to friends. It is very helpful! Do you send mail to friends?
Early Reader · Change the reading level on the articleSimulation
A simulation is like a pretend world. It shows how things work. You can use a computer to play. It helps us learn safely. It can even be a game. Do you like to pretend?
Early Reader · Change the reading level on the articleSingapore Airlines
Singapore Airlines flies big planes. They fly to many places. They have won many prizes. They are very good at helping people fly. It is a very famous airline. Do you like to fly in planes?
Early Reader · Change the reading level on the articleSingle-lens reflex camera
This is a special camera. It uses a small mirror inside. The mirror helps you see your picture. When you click, the mirror moves. This lets light hit the film. It helps you take great photos. Do you like taking pictures?
Early Reader · Change the reading level on the articleSinopec
Sinopec is a very big company. It makes oil and gas. They make fuel for cars. This helps us travel. It is a huge group in China. Do you see their signs on the road?
Early Reader · Change the reading level on the articleSiren (alarm)
A siren makes a loud noise. It tells us to be safe. It can be on a fire truck. It can be on a tall pole. It helps people hear a warning. It is very loud! Do you hear a siren?
Early Reader · Change the reading level on the articleSirhind Canal
This is a big path for water. It brings water from a river. The water helps plants grow well. Now the land is very good for food. It is a very long path. Do you like to see water flow?
Early Reader · Change the reading level on the articleSizing
Special stuff helps paper stay strong. It keeps ink from soaking in. This helps art look good. It also helps cloth stay tough. It makes things work well. Do you like to draw on paper?
Early Reader · Change the reading level on the articleSkeleton key
A skeleton key is a special key. It can open many locks. Most keys only open one lock. This key is cut to fit. It helps people open doors. It is a very handy tool. Can you find a lock?
Early Reader · Change the reading level on the articleSki
Skis help you glide on snow. They go on your feet. You use them to move fast. They help you stay on top of the snow. It is a fun way to play! Do you like the snow?
Early Reader · Change the reading level on the articleSki lift
A ski lift helps you go up hills. It carries skiers on a ride. You can sit in a chair. It moves you to the top. This helps you play in the snow. It is a fun way to travel. Do you want to ride one?
Early Reader · Change the reading level on the articleSkype
Skype was a way to talk. You could see friends on a screen. You could also send notes. It helped people stay close. It was very popular for a long time. Do you like to video chat?
Early Reader · Change the reading level on the articleSky Tower (Auckland)
The Sky Tower is very tall. It is in a city called Auckland. People can go up to see the view. You can even eat food high up. It looks pretty with bright lights at night. Would you like to go up?
Early Reader · Change the reading level on the articleSkyTrain (Vancouver)
The SkyTrain is a fast train. It moves on tracks high in the air. It can also go under the ground. It helps many people get around. It is fun to ride! Do you like trains?
Early Reader · Change the reading level on the articleSledgehammer
A sledgehammer is a big tool. It has a heavy head. It also has a long handle. You use two hands to swing it. It can break walls or drive posts. It is very strong. Can you imagine swinging one?
Early Reader · Change the reading level on the articleSlide rule
A slide rule is a tool for math. It has parts that slide. You move the parts to find answers. It helps people do math fast. It was used a long time ago. Do you like math?
Early Reader · Change the reading level on the articleSlingshot
A slingshot can throw small things. It has a Y shape. You pull a stretchy band back. Then you let it go. It can hit a target. It is fun to use. Do you want to try one?
Early Reader · Change the reading level on the articleSloop
A sloop is a type of boat. It has only one tall pole. This pole holds up the sails. One sail is in front. One sail is in back. It can glide on the water. Do you like to sail?
Early Reader · Change the reading level on the articleSlow cooker
A slow cooker makes food. It sits on your counter. It cooks food very slowly. This helps you make a meal. It can stay warm for a long time. Do you like stew?
Early Reader · Change the reading level on the articleSluice
A sluice is a water path. It has a gate to move water. This gate can stop or start the flow. It helps move logs or power mills. It is very useful for us. Do you want to see a gate move?
Early Reader · Change the reading level on the articleSmall modular reactor
These are small power plants. They make electricity for us. They are built in a factory. Then they are moved to a new home. This helps us have power. Do you want to see more?
Early Reader · Change the reading level on the articleSmart grid
A smart grid helps us use power. It uses computers to talk to homes. This helps us use sun and wind power. It can even help your car. It keeps our lights on. Do you use much power?
Early Reader · Change the reading level on the articleSmartwatch
A smartwatch is a tiny computer. You wear it on your wrist. It looks like a regular watch. It can help you do many things. It can even talk to a phone. It is very cool! Do you want one?
Early Reader · Change the reading level on the articleSmoke detector
A smoke detector is a small tool. It looks for smoke. It makes a loud sound. This helps keep you safe. It tells us if there is a fire. Can you find one in your home?
Early Reader · Change the reading level on the articleSmokeless powder
This is a special powder. It helps things move fast. It does not make thick smoke. This helps people see better. It is very strong too. It works well even when wet. Do you like to see things clearly?
Early Reader · Change the reading level on the articleSMS
You can send short notes on a phone. These notes are called texts. They travel through the air to a friend. You can say "Merry Christmas" in a text. It is a fast way to talk. Do you like to send texts?
Early Reader · Change the reading level on the articleSmudge pot
A smudge pot is a small heater. It burns oil to make heat. Farmers use it to help fruit trees. It keeps the trees warm in the cold. It is a handy tool. Do you like warm fruit?
Early Reader · Change the reading level on the articleSnapchat
Snapchat is a way to talk on a phone. You can send a picture to a friend. The picture goes away after they see it. This makes it fun to share. It is easy to use. Do you like sending pictures to friends?
Early Reader · Change the reading level on the articleSNCF
Trains run on tracks in France. They carry many people. They also carry big things. Some trains go very fast. This helps people travel far. Do you like to ride trains?
Early Reader · Change the reading level on the articleSniper rifle
A sniper rifle is a special tool. It helps people see far away. It uses a scope to look at things. This tool is very good at hitting targets. It is used by many groups. Can you see far away?
Early Reader · Change the reading level on the articleSnorkel (swimming)
A snorkel is a long tube. It helps you breathe in the water. You put it in your mouth. You can see under the waves. It is fun to use! Do you like to swim?
Early Reader · Change the reading level on the articleSnowmobile
A snowmobile helps us travel on snow. It has skis in the front. It has a track in the back. This helps it move fast. It is fun to ride! Do you like the snow?
Early Reader · Change the reading level on the articleSnowshoe
Snowshoes help you walk on snow. They are very big. They spread your weight out. This keeps you on top. You will not sink down. It is fun to walk! Do you like the snow?
Early Reader · Change the reading level on the articleSocial aspects of television
TV shows many things. You can see stories on a screen. TV can help you learn new things. It can also help you feel less lonely. Some people watch too much TV. It is good to play and move too. Do you like to watch TV?
Early Reader · Change the reading level on the articleSocial networking service
You can talk to friends online. You can share photos and videos. You can see what people like to do. It helps us stay close to people. We can meet new friends too. It is a fun way to connect. Do you like to share…
Early Reader · Change the reading level on the articleSoftBank Group
SoftBank is a big company. It helps other companies grow. It gives them money for new ideas. This helps make new tools. It is a very big group. Do you like new tools?
Early Reader · Change the reading level on the articleSoftware bug
A computer bug is a mistake. It happens in computer programs. A bug can make a screen look wrong. It can even make a computer stop. People work hard to fix them. Do you like using computers?
Early Reader · Change the reading level on the articleSoftware-defined radio
A radio can use a computer. It does not use many parts. Instead, it uses code to work. This helps it talk in new ways. It is very helpful for phones. Do you like to use a radio?
Early Reader · Change the reading level on the articleSoftware design
People plan how apps work. They make a plan first. This plan is like a house map. It helps them write code fast. It makes the app work well. Do you like making plans?
Early Reader · Change the reading level on the articleSoftware development
People make computer programs. They plan and draw them first. Then they write the code. They test it to fix mistakes. This makes tools for you to use. Do you like computer games?
Early Reader · Change the reading level on the articleSoftware documentation
People write books for computer programs. These books show how to use them. They help people learn the rules. They also help fix mistakes. These books are very helpful. Do you use computer programs?
Early Reader · Change the reading level on the articleSoftware maintenance
People fix computer programs. They fix mistakes in the code. They also add new things. This helps the tools work well for you. It keeps things running. Do you use computer tools?
Early Reader · Change the reading level on the articleSoftware portability
Some programs work on many tools. They can run on a big computer. They can run on a small phone too. This helps us save time. It makes things easy to use. Do you use many tools?
Early Reader · Change the reading level on the articleSoftware prototyping
People make quick models of computer programs. These models help us see how they work. We can try them out early. This helps us fix mistakes fast. It makes the final work better. Do you like to try new things?
Early Reader · Change the reading level on the article