Bell test
Scientists do a special test. It looks at tiny bits of light. These bits act in strange ways. This helps us learn how the world works. It is very cool! Do you like science?
Early Reader · Change the reading level on the articlePhysical Science articles — Page 18
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 18 of 57
Benjamin Silliman
Benjamin Silliman loved science. He taught many students. He studied rocks and stars. He even found a rock from space. He helped people learn new things. Do you like to learn about science too?
Early Reader · Change the reading level on the articleBen Roy Mottelson
Ben Mottelson was a smart man. He studied very tiny things. He won a big prize for his work. His work helps us learn about the world. He lived in a place called Denmark. Do you like to learn new things?
Early Reader · Change the reading level on the articleBent molecular geometry
Some tiny things look like a V. They do not sit in a straight line. Water is a good example. This shape helps them work. It is very neat to see. Do you see V shapes in your room?
Early Reader · Change the reading level on the articleBertram Brockhouse
Bertram Brockhouse was a smart man. He studied how tiny things work. He won a very big prize. His work helps us learn. He lived in Canada. Do you like to learn new things?
Early Reader · Change the reading level on the articleBET theory
Gas can stick to things. It can stick in many layers. This helps us see how big a surface is. It helps us study things like cement. It is a neat way to look at tiny things. Can you imagine tiny gas bits sticking to a…
Early Reader · Change the reading level on the articleBicarbonate
This is a special part of water. It helps keep our bodies safe. It keeps our insides just right. It even helps make bread rise. It is very useful. Do you use it in your kitchen?
Early Reader · Change the reading level on the articleBiot–Savart law
Moving power makes a force. This force is like a magnet. It can push or pull. It moves in a circle. This helps our tools work. Can you feel a magnet?
Early Reader · Change the reading level on the articleBirefringence
Some crystals can split light. One beam of light becomes two. This makes a double picture. It can look like two things at once. It is very neat to see! Can you see the two pictures?
Early Reader · Change the reading level on the articleBKS theory
Some thinkers had a big idea. They tried to learn about light. They thought light moved in waves. This idea was not quite right. But it helped us learn more. Can you wonder about light?
Early Reader · Change the reading level on the articleBlack body
A black body takes in all light. It does not let light bounce back. This makes it look very dark. It also sends out its own light. This light comes from its heat. Can you find something dark like this?
Early Reader · Change the reading level on the articleBlacklight
A blacklight is a special lamp. It makes a dim purple glow. It sends out light we cannot see. This light makes things glow in bright colors. It can even find bugs! Do you like bright colors?
Early Reader · Change the reading level on the articleBloch's theorem
Tiny bits move in a pattern. They move through solid things. The pattern repeats over and over. This helps us learn how things work. It is very neat! Do you like patterns?
Early Reader · Change the reading level on the articleBlock (periodic table)
The science chart has many parts. These parts are called blocks. Each block has its own spot. They help us learn about things. Some blocks are on the left. Some blocks are on the right. Can you find a block?
Early Reader · Change the reading level on the articleBlue hour
The sky turns a soft blue. This happens near sunrise or sunset. The sun is far below the ground. It makes the light look pretty. We can see it in the morning or night. Do you like the blue sky?
Early Reader · Change the reading level on the articleBohr magneton
Tiny bits in an atom act like magnets. They spin and move in circles. This makes a small pull. This pull helps us understand how atoms work. It is a very small thing. Can you imagine something so tiny?
Early Reader · Change the reading level on the articleBohr radius
Tiny things make up our world. An atom is very small. It has a middle part. A tiny part spins around it. This distance helps us learn. It is a special size. Can you imagine something so small?
Early Reader · Change the reading level on the articleBoiling-point elevation
Water gets hot when it boils. Sometimes we add salt to water. This makes the water hotter. It needs more heat to boil. This helps us learn about things. Can you try this at home?
Early Reader · Change the reading level on the articleBoltzmann constant
Tiny bits of gas move around. Heat makes them move fast. This number helps us know how much. It links heat to how much energy they have. It is a big help to science. Do you like to learn about tiny things?
Early Reader · Change the reading level on the articleBoltzmann distribution
Tiny things move in many ways. Some ways use less power. Things like to stay in low power ways. Heat can change how they move. This helps us learn about small things. Can you see how they move?
Early Reader · Change the reading level on the articleBoltzmann equation
Tiny bits make up everything. They move and bump into each other. This helps us see how heat moves. It also shows how things flow. We can learn a lot from these tiny bits. Do you like to see how things work?
Early Reader · Change the reading level on the articleBoltzmann's entropy formula
Tiny bits make up everything. They move in many ways. Some ways are more common. This helps us know how things work. It is like a big puzzle. Do you like puzzles?
Early Reader · Change the reading level on the articleBonding in solids
Tiny bits hold things together. These bits make all solid things. Some bits stay very strong. Some bits can bend easily. This helps make tools for you. Can you find something hard?
Early Reader · Change the reading level on the articleBoranes
Some things are made of boron. These things can be very special. They help us make new things. Some can even fill up balloons. We use them in science labs. It is a busy world! Do you like science?
Early Reader · Change the reading level on the articleBorate
Some tiny things are in fruit. They are also in the sea. You can find them in dry places. These things help keep wood safe. They are all around us! Can you find fruit today?
Early Reader · Change the reading level on the articleBorax
Borax is a white powder. It comes from dry lakes. It helps clean your clothes. It can even help make green fire! People use it in many ways. Do you have borax at your home?
Early Reader · Change the reading level on the articleBorn rule
Small things can be hard to find. We use a rule to guess where they are. This rule helps us see things. It helps us learn about our world. It is a very smart way to look. Do you like to find things?
Early Reader · Change the reading level on the articleBorohydride
Some tiny bits help make things. They help make medicine. They also help make smells. These bits can even help bleach wood. They are very useful. Do you like new things?
Early Reader · Change the reading level on the articleBoron group
Some things are in a special group. They all have three tiny parts. Some are hard like a gem. Some are soft metals. They help plants grow. They can even be in lights. Do you see these things?
Early Reader · Change the reading level on the articleBoron trifluoride
This is a special gas. It has no color. It can help make new things. It is used in science labs. We must be very careful with it. Do you want to learn more?
Early Reader · Change the reading level on the articleBorosilicate glass
This is a special kind of glass. It does not break easily. It can stay very hot. It can also stay very cold. This glass is used for cooking. It is used in science labs too. Do you like to cook with glass?
Early Reader · Change the reading level on the articleBose–Einstein statistics
Tiny bits of stuff can act in new ways. Some bits like to stay together. They can all crowd into one spot. This helps make things like bright light. It can also make things move smoothly. Can you imagine tiny bits…
Early Reader · Change the reading level on the articleBose gas
Tiny bits of stuff can act like a gas. They move around in a cloud. When it gets very cold, they slow down. They all huddle together in one spot. This makes a new kind of liquid. Can you imagine being that cold?
Early Reader · Change the reading level on the articleBottom quark
Small things make up our world. One tiny thing is called a bottom quark. It is very heavy. It helps us learn about how things work. We can find it in big machines. Can you imagine being that small?
Early Reader · Change the reading level on the articleBouncing ball
A ball can bounce high. It hits the ground. Then it jumps up again. This makes it fun to play. We can play games with balls. Do you like to bounce a ball?
Early Reader · Change the reading level on the articleBoundary layer
Air moves around you. A thin layer of air stays close to your skin. This layer can be warm or cool. It helps you feel the weather. Do you feel the air on your skin?
Early Reader · Change the reading level on the articleBound state
Some tiny things stick together. They act like one big thing. You need energy to pull them apart. This helps make everything we see. It is like a tiny team. Do you see things that stick together?
Early Reader · Change the reading level on the articleBragg's law
Some things have tiny patterns inside. These patterns are like rows of dots. Light hits the dots and bounces back. This helps us see how things are made. It is like a secret map! Can you find patterns in your toys?
Early Reader · Change the reading level on the articleBranches of science
Science is how we learn. We look at the world. We look at how people act. We look at the stars. It helps us know things. It is so much fun! Do you want to learn too?
Early Reader · Change the reading level on the articleBrane
Some tiny things make up our world. They can be small dots. They can be long lines. They can even be flat like a sheet. These things have weight. They move through space. We wonder what they are. Can you imagine a…
Early Reader · Change the reading level on the articleBrayton cycle
Some engines use air to move. They pull air in first. Then they add fuel to it. The air gets very hot. This makes the engine work. This helps big jet planes fly. Do you like planes?
Early Reader · Change the reading level on the articleBrian Cox (physicist)
Brian Cox loves science. He talks about space on TV. He also plays music on a keyboard. His work helps us learn about the world. Do you like stars?
Early Reader · Change the reading level on the articleBrian Josephson
Brian is a smart man. He studies how things work. He found a new way for power to move. This helps us build fast computers. He won a big prize for his work. Do you like science too?
Early Reader · Change the reading level on the articleBridge circuit
A bridge circuit helps us measure things. It uses paths of power. It can tell us how much power a part has. This helps tools work well. It is very useful. Do you like tools?
Early Reader · Change the reading level on the articleBrightness
Brightness is how much light shines. It can look very strong. It can also look dim. This helps us see things. We see light all around us. Can you find something bright? It is fun to look!
Early Reader · Change the reading level on the articleBrightness temperature
We use light to see heat. It tells us how strong light is. Some light comes from hot things. This helps us see far away stars. It also helps us see the sea. Can you feel the sun's heat?
Early Reader · Change the reading level on the articleBrillouin zone
Scientists look at tiny patterns. These patterns help us see waves. They show how things move. It helps us learn about small parts. This is a very cool way to look. Can you see the shapes?
Early Reader · Change the reading level on the articleBrine
This is very salty water. It has a lot of salt in it. We use it to make food taste good. It can also help melt ice on roads. It is very useful! Do you like salty food?
Early Reader · Change the reading level on the article