Henry Cavendish
Henry was a smart man. He liked to study science. He found a new kind of air. He also learned about our big Earth. His work helps us learn today. Do you like to learn new things?
Early Reader · Change the reading level on the articlePhysical Science articles — Page 7
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 7 of 57
Henry (unit)
Some things help move power. We use a special name for this. It is named for a man. It helps us build big motors. This name helps us know how much power moves. It is very cool. Do you like to learn how things work?
Early Reader · Change the reading level on the articleHermann von Helmholtz
Hermann was a smart man. He studied how we see. He also studied how we hear. He made a tool to look in eyes. This helps doctors see us. Can you see well?
Early Reader · Change the reading level on the articleHertz
We use a way to count things. It counts how fast things happen. It counts things that happen every second. This helps us hear music. It helps us use computers. It is very useful! Can you count to one?
Early Reader · Change the reading level on the articleHiggs boson
Tiny bits make up our world. Some bits have weight. A special field helps them get this weight. This field is everywhere. It helps things stay together. Can you feel how heavy things are?
Early Reader · Change the reading level on the articleHistory of atomic theory
Everything is made of tiny bits. These bits are called atoms. They are too small to see. They move all the time. Atoms make up the whole world. We are made of them too! Can you find something made of atoms?
Early Reader · Change the reading level on the articleHistory of chemistry
People have used fire for a long time. Fire helps us cook food. It also helps us make tools from metal. Long ago, people learned to make things like glass. This helps us every day. Do you like to see how things work?
Early Reader · Change the reading level on the articleHistory of physics
People study how things work. They look at stuff and power. Long ago, thinkers asked why things move. Now, we learn new things every day. It helps us know our world. Do you like to learn how things work?
Early Reader · Change the reading level on the articleHolmium
Holmium is a shiny metal. It is very hard to find. It can be used to make strong magnets. This helps us in many ways. It is a special thing to see. Can you find a magnet at home?
Early Reader · Change the reading level on the articleHolography
A hologram is a special picture. It looks like it is real. It has depth like a toy. You can see it from many sides. It is very cool to look at! Can you find a hologram?
Early Reader · Change the reading level on the articleHooke's law
Springs can stretch and squash. If you pull a spring, it gets longer. The harder you pull, the more it grows. It works this way for many things. It helps clocks work well. Can you find a spring near you?
Early Reader · Change the reading level on the articleHour
An hour is a part of a day. There are 60 minutes in one hour. We use hours to tell time. It helps us know when to work or play. Do you know what time it is?
Early Reader · Change the reading level on the articleHumphry Davy
Humphry Davy was a smart man. He loved to study science. He found many new things. He even found a gas that makes you laugh! . His work helps us today. Do you like science too?
Early Reader · Change the reading level on the articleHydrocarbon
Some things are made of carbon and hydrogen. These things can be gas or liquid. They can even be hard like wax. We use them to make heat and power. They help us move in cars. Do you use them every day?
Early Reader · Change the reading level on the articleHydrochloric acid
This is a strong acid. It is inside your tummy. It helps you break down food. It can also clean things. It is very helpful to us. Do you have a tummy?
Early Reader · Change the reading level on the articleHydrofluoric acid
Some liquids can eat through things. This liquid is very strong. It can even change glass. It helps make things like pans. It is used in many ways. Can you imagine a liquid that eats glass?
Early Reader · Change the reading level on the articleHydrogen bond
Tiny bits of stuff stick together. They act like small magnets. This helps make water. It also helps make your DNA. It is a very big job! Do you like water?
Early Reader · Change the reading level on the articleHydrogen peroxide
This is a clear liquid. It is often in water. It helps clean things. It can even help rockets fly. It is in our bodies too. Do you see bubbles in it?
Early Reader · Change the reading level on the articleIbn al-Haytham
A man named Alhazen loved light. He studied how we see. He found that light bounces off things. Then the light goes into our eyes. This helps us see the world. Do you like to look at bright colors?
Early Reader · Change the reading level on the articleIdeal gas law
Gas is all around us. It moves in tiny ways. When it gets hot, it pushes more. This can change how much space it takes. It helps us understand how things work. Do you feel the air move?
Early Reader · Change the reading level on the articleImperial units
People use tools to measure things. These tools help us know how big or heavy things are. We can use them for food or water. They help us every day. Do you like to measure things?
Early Reader · Change the reading level on the articleImpulse (physics)
A push can change how things move. It happens when things hit each other. This can change how fast they go. It helps us understand big hits. It even helps rockets fly! Can you feel a push?
Early Reader · Change the reading level on the articleInch
An inch is a way to measure. It is a small length. It can be as wide as your thumb. Long ago, people used seeds to measure it. Now, it is used for TV screens. It helps us know how big things are. Can you find an inch?
Early Reader · Change the reading level on the articleInclined plane
A ramp is a flat slope. It helps move heavy things. You can push things up a ramp. It is easier than lifting them up. This helps people in chairs too. It makes hard work easy. Have you seen a ramp?
Early Reader · Change the reading level on the articleIndium
Indium is a shiny metal. It is very soft. You can cut it with a knife. It helps make flat screens. This helps you see your shows. It is very cool! Can you find a screen?
Early Reader · Change the reading level on the articleInductance
Electricity can move in a wire. Moving power makes a tiny magnet. This magnet does not like to change. It tries to keep the power the same. This helps us use power in many ways. Can you find a wire?
Early Reader · Change the reading level on the articleInductor
A coil is a loop of wire. It uses electricity to make a magnet. This magnet stores energy. It helps your radio work. It can even help your TV work. Do you like to listen to music?
Early Reader · Change the reading level on the articleInertia
Things like to stay as they are. If a thing is still, it stays still. If it moves, it keeps moving. It only stops if something pushes it. This helps us move things. Do you like to move?
Early Reader · Change the reading level on the articleInfrared
Some light is invisible. We cannot see it with our eyes. It is like heat from a fire. This light helps us see in the dark. It can even see through dust in space. Can you feel the heat from the sun?
Early Reader · Change the reading level on the articleInorganic compound
Some things are not made of life. They make up most of the Earth. Rocks and salts are part of this. They are all around us. It is a big world to see. Can you find a rock today?
Early Reader · Change the reading level on the articleInterferometry
Light can act like a wave. We can split one beam into two. The two beams travel on different paths. Then they come back together. This makes a pretty pattern. Scientists use this to see tiny things. Can you see the…
Early Reader · Change the reading level on the articleIntermolecular force
Tiny bits of stuff pull on each other. They stay close like friends. These pulls are very weak. They help things like water stay together. This helps everything in our world. Do you see how things stick?
Early Reader · Change the reading level on the articleInternal energy
Everything has energy inside it. This energy is hidden. It is made of tiny moving parts. It can change with heat. It can change when things move. This energy helps things work. Can you feel heat on your skin?
Early Reader · Change the reading level on the articleIodine
Iodine is a special thing. It can look like a dark solid. It can turn into a purple gas. Our bodies need it to stay well. It helps us grow and think. Do you like the color purple?
Early Reader · Change the reading level on the articleIon
Tiny bits can have a charge. Some bits are plus. Some bits are minus. They like to pull together. This helps make things. Do you see them? They are everywhere!
Early Reader · Change the reading level on the articleIonic bonding
Tiny bits join to make things. One bit gives a gift to another. This makes them stick together. It helps make salt. This is how many things stay strong. Do you like salt on your food?
Early Reader · Change the reading level on the articleIonization
Tiny parts make things change. These parts can move. They can bump into things. This can make light. It helps us see. It works in lamps. Can you see the lights?
Early Reader · Change the reading level on the articleIonizing radiation
Tiny bits of energy move fast. They can bump into small parts of things. This can change how things work. This energy is all around us. It helps doctors help people. Can you find it?
Early Reader · Change the reading level on the articleIridium
Iridium is a very strong metal. It is a silvery color. It is very hard to break. It helps make parts for cars. It is hard to find on Earth. It can come from space! Can you find it in a rock?
Early Reader · Change the reading level on the articleIrving Langmuir
Irving Langmuir was a smart man. He studied how things work. He helped make better light bulbs. This helps us see in the dark. He was very good at science. Do you like to learn new things?
Early Reader · Change the reading level on the articleIsotope
Everything is made of tiny bits. Some bits are almost the same. They look like twins. But one twin is a bit heavier. This is how the world works. Can you find tiny bits too?
Early Reader · Change the reading level on the articleJabir ibn Hayyan
A man named Jabir wrote many books. He wrote about how things change. He studied how to make new things. His work helps us learn today. Do you like to learn new things? Can you find a book to read?
Early Reader · Change the reading level on the articleJacobus Henricus van 't Hoff
Jacobus was a man who loved science. He studied how things work. He won a very big prize. This prize was for his smart ideas. His work helps us learn today. Do you like to learn new things?
Early Reader · Change the reading level on the articleJames Chadwick
James Chadwick was a smart man. He studied how tiny things work. He found a new part of the atom. This helped us learn a lot. He even won a big prize. Do you like to learn new things?
Early Reader · Change the reading level on the articleJames Prescott Joule
James Joule was a smart man. He studied how heat works. He found how work makes heat. This helps us use energy today. He was a great scientist. Do you like to learn about heat?
Early Reader · Change the reading level on the articleJ. J. Thomson
A man named J. J. Thomson studied science. He found tiny bits in atoms. These tiny bits are called electrons. They help us use power. He was a great teacher too. Can you find tiny things?
Early Reader · Change the reading level on the articleJohannes Diderik van der Waals
A man named Van der Waals studied tiny things. He looked at how air and water work. He found out how small bits pull on each other. This helps us know how things change. He won a big prize for his work. Do you like…
Early Reader · Change the reading level on the articleJohn Bardeen
John Bardeen was a smart man. He helped make new things. He helped make parts for phones and computers. This helps us talk to friends. He won a very big prize twice. Can you imagine that? He was a great thinker.
Early Reader · Change the reading level on the article