Onium
Tiny bits can join together. They stick like a pair. This makes a new thing. It helps us learn about our world. We can study how it works. Do you like to learn new things?
Early Reader · Change the reading level on the articlePhysical Science articles — Page 42
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 42 of 57
Opacity
Some things block light. These things are called opaque. They do not let light through. Light hits them and stops. A mirror is one kind. Can you find something opaque?
Early Reader · Change the reading level on the articleOpen-chain compound
Tiny bits of stuff can join together. They can make long lines. Some lines are straight. Some lines have sides. These lines help make things in our world. It is all around us. Do you see shapes too?
Early Reader · Change the reading level on the articleOperator (physics)
A tool helps us learn. It changes one thing to another. It helps us see how things move. This tool is very helpful. It shows us how the world works. Can you use a tool to learn?
Early Reader · Change the reading level on the articleOptical aberration
Lenses help us see things. Sometimes the picture looks blurry. It might even have extra colors. This happens when light does not meet in one spot. People work hard to fix this. Do you like clear pictures?
Early Reader · Change the reading level on the articleOptical depth
Light can travel through things. Sometimes, things like dust block the light. This makes the light look dim. It can even hide the sun. This helps us see the air. Can you see the sun today?
Early Reader · Change the reading level on the articleOptical filter
A filter is a special tool. It can change light. It lets some colors through. It stops other colors. This helps us take good photos. It also helps us see stars. Do you like bright colors?
Early Reader · Change the reading level on the articleOptical path
Light travels in a path. It moves from one place to another. Light can hit a mirror and turn. It can also go through glass. This helps us see the world. It is very cool to watch. Can you see the light move?
Early Reader · Change the reading level on the articleOptical path length
Light moves through things. It can go through air. It can go through glass. Light takes time to move. Some things make light slow down. This changes how light acts. Can you see light move?
Early Reader · Change the reading level on the articleOptical power
Lenses help us see things. They bend light to make things clear. Some lenses help your eyes work well. They can help you see far away. They can help you see close up. Do you wear glasses to help you see?
Early Reader · Change the reading level on the articleOptical pumping
Light can move tiny things. It moves small parts in an atom. This helps make a laser work. It is like a pump for light. We use it to study how things work. Can you see the light?
Early Reader · Change the reading level on the articleOptical spectrometer
A tool looks at light. It can see what things are made of. It works like a special eye. It can even look at far stars. This helps us learn about space. It is very cool! Do you like stars?
Early Reader · Change the reading level on the articleOpticks
A man named Isaac Newton studied light. He used glass to see colors. He found that white light has many colors inside. This helps us see the world. Do you like bright colors?
Early Reader · Change the reading level on the articleOrbital hybridisation
Tiny parts mix to make new shapes. These parts help atoms stick together. They make strong bonds. This helps build everything around us. It is like magic! Do you like to build things?
Early Reader · Change the reading level on the articleOrganic acid
{ "text": Some things are made of special acids. \nThese acids are in plants and animals. \nThey can help keep food safe. \nThey also help clean up rust. \nNature uses them in many ways. \nCan you find them in food?…
Early Reader · Change the reading level on the articleOrganic reaction
Tiny bits of stuff change. These changes make new things. They make soap and food. They even make your medicine. We use them every day. Can you find something made this way?
Early Reader · Change the reading level on the articleOrganic synthesis
People can make new things. They build tiny bits of matter. They can make medicine to help you. This work is very cool. Do you want to learn more?
Early Reader · Change the reading level on the articleOrganochlorine chemistry
Some things have a special part. This part helps them work. They can be used as medicine. They can also be used for cleaning. Some can even hurt the Earth. We must be careful with them. Do you see these things around…
Early Reader · Change the reading level on the articleOrthorhombic crystal system
Some tiny shapes look like boxes. These boxes have long and short sides. They have straight corners. They make up many things in our world. It is cool to see how they fit! Can you find a box shape?
Early Reader · Change the reading level on the articleOsborne Reynolds
A man named Osborne Reynolds studied water. He watched how it moves in pipes. Sometimes water flows in a smooth line. Other times it moves in a wild way. This helps us build big ships. Do you like to watch water move?
Early Reader · Change the reading level on the articleOsmium tetroxide
This is a special kind of stuff. It can look yellow. It has a strong smell. It helps us see tiny cells. It makes them dark so we can see them. Can you imagine a tiny world?
Early Reader · Change the reading level on the articleOsmotic pressure
Water moves to find a balance. It flows through a tiny wall. It goes to where there is more salt or sugar. This helps plants stand up tall. It can even clean our water. Do you like to play in water?
Early Reader · Change the reading level on the articleOtto cycle
{ "text":“Cars use a special engine to move. \nIt uses air and fuel. \nA spark makes a tiny pop. \nThis pop pushes a part to make power. \nIt helps your car go fast. \nDo you like car rides? ”", "media": […
Early Reader · Change the reading level on the articleOtto Stern
Otto Stern was a great scientist. He studied how small things work. He won a very big prize. This prize is for smart work. He helped us learn about the world. Do you like to learn new things?
Early Reader · Change the reading level on the articleOtto von Guericke
Otto was a smart man. He lived a long time ago. He loved to learn new things. He made a tool to move air. This helped him learn about space. Do you like to learn too?
Early Reader · Change the reading level on the articleOutline of physics
Science helps us learn about everything. It looks at how things move. It looks at how things work. This helps us know our world. It is very fun to learn. Do you want to learn too?
Early Reader · Change the reading level on the articleOwen Chamberlain
Owen Chamberlain was a smart man. He studied how tiny things work. He found a new tiny part of our world. This helped him win a big prize. He worked hard to learn. Do you like to learn new things?
Early Reader · Change the reading level on the articleOwen Richardson
Owen was a smart man. He studied how heat works. He found how hot things make sparks. This work helped us a lot. He even won a big prize. Do you like to learn how things work?
Early Reader · Change the reading level on the articleOxalic acid
Some plants make a special juice. It is in spinach and kale. It can help clean rust away. It is also in some fruits. Do not eat too much of it. Can you find it in your food?
Early Reader · Change the reading level on the articleOxidation state
Tiny bits make up everything. These bits can share or swap small parts. Sometimes a bit loses a part. This helps us know how things work. It is like a tiny game of tag. Can you find things made of tiny bits?
Early Reader · Change the reading level on the articleOxidizing agent
Some things help things burn. They give air to a fire. This helps a fire grow fast. This can be very strong. We must be careful with them. Do you know what helps a fire burn?
Early Reader · Change the reading level on the articleOxonium ion
Small parts of things can join together. They can make new things. These parts help make things in the sea. This helps us learn. It is very neat! Do you like to learn about small things?
Early Reader · Change the reading level on the articleOxyanion
Some tiny things use oxygen. They are made of many parts. These parts help living things work. They help us get energy. They are all around us. Can you find them?
Early Reader · Change the reading level on the articleOxygen difluoride
This is a special gas. It can help rockets fly. It is very strong. It can react with many things. We must be very careful with it. It can be unsafe. Do you like looking at rockets?
Early Reader · Change the reading level on the articlePair production
Light can turn into tiny things. It makes two small pieces. One piece is like a twin. The twin is the opposite. This helps us learn about space. Can you imagine light turning into stuff?
Early Reader · Change the reading level on the articleParaffin wax
Some wax is made from oil. It is a soft, white solid. We use it to make candles. It can also make colorful crayons. This wax helps us see in the dark. Do you have a candle at home?
Early Reader · Change the reading level on the articleParamagnetism
Some things act like tiny magnets. They pull toward a big magnet. This pull is very soft. It happens when tiny parts inside move together. This helps us learn about our world. Can you find a magnet?
Early Reader · Change the reading level on the articleParent hydride
Some things are made of one kind of part. They use a small part and a gas part. We use these to name other things. This helps us know what is inside. It is a way to name new things. Do you like to name things?
Early Reader · Change the reading level on the articleParity (physics)
A mirror flip is like a trick. It turns things into their mirror image. This can happen in space. Some things stay the same. Some things change. It is fun to look! Can you see your mirror self?
Early Reader · Change the reading level on the articlePartial pressure
Air is made of many parts. Each part has its own push. We call this push pressure. This helps us breathe. It also helps gas move. Can you feel the air push?
Early Reader · Change the reading level on the articleParticle decay
Tiny bits of stuff change. They turn into new bits. This happens all by itself. It helps us learn about space. It is a big wonder. Can you imagine tiny bits moving?
Early Reader · Change the reading level on the articleParticle in a box
A tiny thing is in a box. It can move around. It cannot sit still. It can only have some amounts of energy. It can even be in spots where it is not found. Do you want to learn more?
Early Reader · Change the reading level on the articleParticle number
Everything is made of tiny bits. We call these little bits particles. You can count them one by one. They make up things like water or air. They are very, very small. Can you imagine counting them all?
Early Reader · Change the reading level on the articleParticle statistics
Tiny bits make up our world. Some bits are easy to tell apart. Other bits are just the same. We cannot see which is which. This helps us learn how things work. It is a big puzzle! Can you find tiny things?
Early Reader · Change the reading level on the articleParticulate matter
{ "text": [ "Tiny bits float in the air.", "They are too small to see.", "Dust and smoke can make them.", "They can get inside our bodies.", "We must keep our air clean.", "Can you see the dust?", " " ], "media": […
Early Reader · Change the reading level on the articlePartition function (statistical mechanics)
Tiny bits make up everything. They move in many ways. We can use math to see how they act. This helps us know how things feel. It helps us know how hot or cold things are. Do you like to learn about tiny things?
Early Reader · Change the reading level on the articleParton (particle physics)
Tiny bits make up small things. These bits are very small. They live inside tiny parts of our world. We use them to learn how things work. It is a big mystery! Can you imagine tiny bits?
Early Reader · Change the reading level on the articleParts-per notation
We use special ways to count tiny things. It helps us see very small bits. It can show bits in a big pool of water. This matters to keep our water clean. Can you find tiny things?
Early Reader · Change the reading level on the article