Vanillin
Vanilla has a sweet smell. It comes from a green pod. This pod grows on a plant. It helps make food taste good. You might smell it in treats. Do you like the smell of vanilla?
Early Reader · Change the reading level on the articlePhysical Science articles — Page 56
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 56 of 57
Try Science Lab activities about forces and motion, light, sound and electricity or matter and chemistry.
Vaporization
Liquid can turn into gas. This can happen on top. It can also happen with bubbles. This is how steam works. It is a cool thing to see. Can you see steam today?
Early Reader · Change the reading level on the articleVariational method (quantum mechanics)
Tiny things have energy. Scientists want to find the lowest energy. They make a smart guess. They change the guess to make it better. This helps them learn about small things. It is like a game of finding the best…
Early Reader · Change the reading level on the articleVermilion
Vermilion is a bright red color. It comes from a special rock. This rock makes a pretty red paint. People use it to make art. It is very bright and pretty. Do you like the color red?
Early Reader · Change the reading level on the articleVertical pressure variation
Things push on you from all sides. This push is called pressure. It gets stronger when you go deep. This is because more stuff is above you. The weight of the stuff pushes down. Do you feel the air push on you?
Early Reader · Change the reading level on the articleVibration
Things can shake back and forth. This is called a vibration. It can make music or loud sounds. Sometimes, shaking can be bad for machines. It can even make a car bumpy. Do you feel things shake?
Early Reader · Change the reading level on the articleVicinal (chemistry)
Tiny parts can live close together. They sit on side by side. One part is on one spot. The next part is on the next spot. This helps us know how they fit. It is like being neighbors. Do you have a neighbor?
Early Reader · Change the reading level on the articleVictor Grignard
Victor Grignard was a smart man. He studied how things change. He found a new way to make food for science. This work helped him win a big prize. He was a very kind person. Do you like to learn new things?
Early Reader · Change the reading level on the articleVictor Hess
A man named Victor found a secret. He flew high in a balloon. He looked for things in the air. He found light from space. This helps us learn about the stars. It is very cool! Do you like to look at the sky?
Early Reader · Change the reading level on the articleViolet (color)
Violet is a pretty color. It is like a flower. It is near blue light. Some kings wore this color. It can look very grand. Do you like violet?
Early Reader · Change the reading level on the articleVirial expansion
Gas can push on things. We can use math to see how it pushes. This helps us know how gas moves. It is a smart way to learn. Can you wonder about the air?
Early Reader · Change the reading level on the articleVirial theorem
Stars stay together in big groups. They move fast in space. This movement helps them stay in place. It is like a dance. We can use math to see how they work. Do you like looking at the stars?
Early Reader · Change the reading level on the articleViridian
Viridian is a pretty color. It is a mix of green and blue. It looks like bright spring grass. Artists use it in their paint. It can stay bright for a long time. Do you like this color?
Early Reader · Change the reading level on the articleVirtual image
Look in a mirror. You see yourself. It looks like you are behind the glass. But you are not really there! It is just a trick of light. Can you see your face?
Early Reader · Change the reading level on the articleVirtual particle
Tiny things pop in and out. They do not stay for long. They help things push or pull. This helps how the world works. It is a very small dance. Can you imagine tiny things moving?
Early Reader · Change the reading level on the articleVirtual work
Things move in smart ways. A push can make things move. It finds the best path. This helps us use tools like levers. We can move heavy things. Do you like to build things?
Early Reader · Change the reading level on the articleVitaly Ginzburg
Vitaly Ginzburg was a smart man. He studied how things work. He found ways to help us use power. His work helps make fast trains. It also helps doctors. He won a very big prize. Do you like science?
Early Reader · Change the reading level on the articleVitriol
Some rocks look like colorful glass. They grow in old mines. Some are blue and some are green. They are very pretty to see. Do you like bright colors?
Early Reader · Change the reading level on the articleVlasov equation
Tiny bits of stuff move in a big group. These bits act like a team. They push and pull on each other. This helps us see how they move. It is a big puzzle. Can you see how they work together?
Early Reader · Change the reading level on the articleVolatile (astrogeology)
Some things turn into gas easily. They can be ice or air. They are found on planets and moons. These things help volcanoes erupt. They make big bubbles in hot rock. It is very cool to see. Can you find gas in the air?
Early Reader · Change the reading level on the articleVoltage source
A battery is a source of power. It gives energy to things. This energy helps your toys work. It can also help lights shine. We use these tools every day. Do you have a battery in your toy?
Early Reader · Change the reading level on the articleVoltammetry
We use power to study things. We change the push of power. Then we see how much flows. This helps us know what is in a mix. It is like a test for tiny bits. Do you want to see how it works?
Early Reader · Change the reading level on the articleVolume fraction
We mix things to make new things. We can measure how much of one thing is in a mix. This helps us know what is inside. It is a way to see how things fit. Can you think of a mix you like?
Early Reader · Change the reading level on the articleVolumetric flow rate
Water can move in a stream. It flows past a certain spot. We can count how much moves. This helps us know how fast it goes. It is a way to see flow. Do you like to watch water move?
Early Reader · Change the reading level on the articleVorticity
Some things like to spin. Water or air can swirl around. It can spin like a top. This spin helps planes fly high. It can even make a storm. Can you see things spin?
Early Reader · Change the reading level on the articleVSEPR theory
Tiny parts in a molecule push each other. They want to stay far apart. This makes the molecule a certain shape. It is like balloons tied together. The shape helps everything stay steady. Can you see the shapes?
Early Reader · Change the reading level on the articleWalter Brattain
Walter was a smart man. He worked with tiny parts. He helped make a new tool. This tool helps our machines work. It is in many things we use. Do you like machines?
Early Reader · Change the reading level on the articleWalter McCrone
Walter was a man who looked at tiny things. He used a special tool to see them. He could see small bits of ink. He could see small bits of paint. His work helped people find the truth. Do you like to look at tiny things?
Early Reader · Change the reading level on the articleWalther Bothe
Walther Bothe was a smart man. He studied how tiny things work. He won a very big prize for his work. His ideas helped us learn about space. He was a great teacher, too. Do you like to learn new things?
Early Reader · Change the reading level on the articleWalther Nernst
Walther Nernst was a smart man. He studied how heat works. He won a big prize for his work. His ideas help us learn about science today. He even helped make a new kind of piano. Do you like to learn about science?
Early Reader · Change the reading level on the articleWater–gas shift reaction
We can make gas from water. This gas helps us. It can make fuel. This helps us move. It is a big job. Do you like to learn?
Early Reader · Change the reading level on the articleWavefront
Waves move in a special way. They move as a group. This group can be flat. It can also be round. Lenses can change their shape. This helps us see things. Can you see waves in a pool?
Early Reader · Change the reading level on the articleWave function collapse
Tiny things act like waves. They can be in many places at once. This changes when we look at them. Looking makes them pick one spot. It is like magic! Do you want to see?
Early Reader · Change the reading level on the articleWavenumber
Waves move in a pattern. You can count these patterns. We see how many waves fit in a space. This helps us study light. It is a neat way to look at the world. Can you see waves in the water?
Early Reader · Change the reading level on the articleWave packet
A wave packet is a small burst of waves. It moves like a single unit. Sometimes the waves stay the same shape. Sometimes they spread out. This helps us learn about tiny things. Can you see the waves move?
Early Reader · Change the reading level on the articleWave vector
Waves move in many ways. They can go in a line. We can see which way they go. This helps us know where they are. It is very cool to watch. Can you see waves in the water?
Early Reader · Change the reading level on the articleWax
Wax is a soft stuff. Bees make it for their homes. Plants make it too. It can help keep things dry. We use it for candles and crayons. Do you see wax near you?
Early Reader · Change the reading level on the articleWeak base
Some things act like a base. They can change water. A weak base does not change it all the way. It stays mostly the same. This can help in your body. Do you want to learn more?
Early Reader · Change the reading level on the articleWeak hypercharge
Tiny bits make up our world. These bits have a special charge. This charge helps them work. It is like a tiny rule for them. We use it to learn about them. Can you think of tiny things?
Early Reader · Change the reading level on the articleWeak isospin
Tiny bits make up our world. Some bits have a special charge. This charge helps them move and change. It lets them talk to each other. This is how small things work. Do you like to learn about tiny things?
Early Reader · Change the reading level on the articleWheatstone bridge
This tool helps us measure things. It uses a path for power. We can find a hidden number. It is very good at this. It helps us learn about our world. Can you find things to measure?
Early Reader · Change the reading level on the articleWheeler–Feynman absorber theory
Tiny bits of light move in space. They move from one thing to another. All the bits in the world help. They push and pull on each other. This helps things work right. Do you like to see light?
Early Reader · Change the reading level on the articleWhite spirit
White spirit is a clear liquid. It helps clean up paint. It can also clean tools. It is not for drinking. It can make you feel sick. We must be careful with it. Do you like to paint?
Early Reader · Change the reading level on the articleWien approximation
Hot things give off light. This light comes from heat. A man named Wien found a rule for it. His rule helps us see light. It works for some kinds of light. Can you feel heat from a lamp?
Early Reader · Change the reading level on the articleWien's displacement law
Hot things change color. A hot metal turns red. It can even turn blue. This happens when things get very hot. It helps us see how hot a star is. Can you see the colors in the sky?
Early Reader · Change the reading level on the articleWilhelm Eduard Weber
Wilhelm Weber was a smart man. He loved to study how things work. He helped make a way to send messages. This helps us talk to people far away. He was a great teacher, too. Do you like to learn new things?
Early Reader · Change the reading level on the articleWilhelm Ostwald
Wilhelm was a man who loved science. He studied how things change. He found ways to make new things. This helped many people. He won a big prize for his work. Do you like to do science too?
Early Reader · Change the reading level on the articleWilhelm Wien
Wilhelm Wien was a smart man. He studied how heat moves. He found out how heat glows. This helps us learn about the world. He won a big prize for his work. Do you like to learn new things?
Early Reader · Change the reading level on the article