Peridot
Peridot is a pretty green stone. It is the color of olives. Some come from space in rocks. This gem is special to find. It is a gift for August birthdays. Do you like green stones?
Early Reader · Change the reading level on the articleEarth Science articles — Page 23
Explore rocks, volcanoes, weather, oceans and the processes that shape Earth. Choose an article below; its reading controls let you move between the available levels.
1,427 public articles · Page 23 of 30
Peridotite
This rock is green. It comes from deep inside the Earth. It is very heavy. It can even hold diamonds. We find it far below our feet. Do you want to see it?
Early Reader · Change the reading level on the articlePerito Moreno Glacier
This is a giant wall of ice. It is in a place called Argentina. The ice moves into a big lake. Sometimes the ice breaks with a loud sound. It is a grand sight to see. Do you like ice?
Early Reader · Change the reading level on the articlePerovskite
Some rocks are very special. They have a neat shape. You can find them in the ground. They can even be in space! They help make solar panels. Can you find a shiny rock?
Early Reader · Change the reading level on the articlePetalite
Petalite is a pretty stone. It can be pink or white. It can even look like a leaf. We use it to make glass. It helps make things for your kitchen. Do you like shiny stones?
Early Reader · Change the reading level on the articlePetrified wood
Some wood turns into stone. It happens under the ground. This takes a very long time. It can look like colorful rocks. You can even make tables from it. Have you ever seen a stone tree?
Early Reader · Change the reading level on the articlePetroleum reservoir
Oil and gas hide deep in the ground. They come from tiny plants that died long ago. Heat and weight turn them into oil. Rock holds the oil in place. We drill to find it. Can you imagine finding it deep down?
Early Reader · Change the reading level on the articlePhilippine Sea plate
A big part of the sea floor moves. It sits under the blue water. It hits many other parts of the earth. This can change the land. It is a very big place. Do you like to learn about the sea?
Early Reader · Change the reading level on the articlePhilippine Trench
There is a deep spot in the sea. It is a long, low place. It is under the blue water. The floor drops down very far. It is one of the deepest spots. Can you imagine the deep, dark sea?
Early Reader · Change the reading level on the articlePhosphate mineral
Some rocks have special parts. These parts help plants grow. They are used in food too. They can even stop rust. These rocks help us every day. Do you like rocks?
Early Reader · Change the reading level on the articlePhosphorite
Some rocks have special stuff inside. This stuff helps plants grow. It can come from old bones. It can even come from bird droppings. We use it to make food for farms. Do you like to garden?
Early Reader · Change the reading level on the articlePhosphorus cycle
Tiny bits of food are in the ground. Plants take these bits from the soil. Animals eat the plants to grow. This helps build strong bones and teeth. It helps all living things stay well. Can you find plants in your yard?
Early Reader · Change the reading level on the articlePhotic zone
Sunlight hits the top of the sea. This part is bright. Tiny plants live here. They use light to make food. Most sea life lives in this spot. It is a busy place. Do you like the bright sun?
Early Reader · Change the reading level on the articlePhyllite
This is a special rock. It can shine like silk. It looks wavy and smooth. People use it to make art. It can even be a garden stone. Do you like shiny rocks?
Early Reader · Change the reading level on the articlePhysical geodesy
Earth has a pull. This pull is called gravity. It pulls things down to the ground. This pull is not the same everywhere. It helps us find how high things are. It is very cool! Do you feel the pull?
Early Reader · Change the reading level on the articlePico de Orizaba
This is a very big mountain. It is a volcano in Mexico. It has white snow on top. The snow stays there all year. It helps give us fresh water. Do you like the snow?
Early Reader · Change the reading level on the articlePigeonite
This is a special rock part. It is found in hot lava. It is also in space rocks. It can tell us how hot a rock was. We can find it on Earth. Can you find a rock?
Early Reader · Change the reading level on the articlePınargözü Cave
A big cave sits in Turkey. Water pours out of its mouth. It is very hard to go inside. There are many waterfalls in the dark. It is a place for experts. Can you imagine a wet cave? It is a very big place.
Early Reader · Change the reading level on the articlePlagioclase
This is a special rock. It is found in the ground. It is also on the Moon. It helps us learn about our world. Do you like rocks?
Early Reader · Change the reading level on the articlePlanetary boundaries
Our Earth has rules. These rules keep our world safe. We must stay in the safe zone. This helps all living things. It helps you and me too. We can help the Earth. Do you want to help?
Early Reader · Change the reading level on the articlePlastic pollution
Plastic is everywhere. It is in bags and bottles. Sometimes plastic gets lost in the land or sea. This can hurt animals. We must work to clean it up. Can you help keep our world clean?
Early Reader · Change the reading level on the articlePleistocene
A long time ago, the Earth was very cold. Big sheets of ice covered the land. It was called the Ice Age. This made the world look very different. We live in a warmer time now. Do you like the snow?
Early Reader · Change the reading level on the articlePliocene
A long time ago, the Earth changed. It became cooler and drier. The land moved too. New paths for animals grew. This helped many things live. Can you imagine the old Earth?
Early Reader · Change the reading level on the articlePluvial lake
Long ago, there were big lakes. These lakes grew from much more rain. The water filled up deep holes in the ground. Now many of them are dry. They help us learn about the past. Can you imagine a huge lake in the desert?
Early Reader · Change the reading level on the articlePobiti Kamani
There are many tall stone poles. They stand in a dry place. They look like a stone forest. These rocks were made a long time ago. They are a special sight to see. Do you like big rocks?
Early Reader · Change the reading level on the articlePodzol
Some soil looks like ash. It is found under pine trees. This soil is very sandy. It can be hard for plants to grow. We can see it in the woods. Have you seen gray soil before?
Early Reader · Change the reading level on the articlePoint bar
Rivers make sandy spots in bends. These spots are inside the curve. They have sand and small stones. The water moves them there. It is a good place to rest a boat. Do you like the river?
Early Reader · Change the reading level on the articlePolar climate
Some places on Earth are very cold. These places have lots of ice and snow. It is often too cold for trees to grow. Some spots are even dry like a desert. It is a very chilly world! Do you like the snow?
Early Reader · Change the reading level on the articlePolar night
The sun stays down for a long time. It stays below the ground. This happens at the top and bottom of Earth. It can feel very dark. Even when it is dark, you might see some light. Do you like the stars?
Early Reader · Change the reading level on the articlePolar regions of Earth
The top and bottom of Earth are very cold. Much of the land is covered in ice. It is dark for a long time in winter. In summer, the sun stays up all day. Many animals live there. Do you like the snow?
Early Reader · Change the reading level on the articlePolar stratospheric cloud
Some clouds live very high up. They form when it is very cold. They can look like bright pearls. These clouds shine in the dark sky. They help us see colors at night. Have you ever seen a pearl cloud?
Early Reader · Change the reading level on the articlePollucite
Pollucite is a special rock. It can be white or gray. It holds a rare part used in work. This rock is found in Canada. It helps us do big jobs. Do you like looking at rocks?
Early Reader · Change the reading level on the articlePont d'Arc
This is a big rock bridge. It is in France. A river made it. It is very high and wide. People go there to boat. It is a fun place to see. Do you like big rocks?
Early Reader · Change the reading level on the articlePopigai impact structure
A big rock hit the Earth. It made a giant hole. This happened a long time ago. The hit made tiny diamonds in the ground. They are very small. We can learn from this place. Do you like shiny things?
Early Reader · Change the reading level on the articlePopocatépetl
Popocatépetl is a big mountain. It is a volcano in Mexico. It can smoke and blow ash. This can change the air. It is a very famous place. Do you want to see it?
Early Reader · Change the reading level on the articlePorphyry copper deposit
Hot liquid rock is deep in the ground. It moves up to find a home. This rock carries shiny metal. We use this metal for many things. It is very helpful to us. Do you like using metal?
Early Reader · Change the reading level on the articlePorphyry (geology)
This is a special rock. It has big crystals inside. It can be deep purple. Long ago, kings loved it. They used it for big buildings. Do you like purple rocks?
Early Reader · Change the reading level on the articlePortlandite
Some rocks have a special part. It is found in many places. It can form near hot steam. It can even come from coal. This part helps make cement. It is a neat find! Can you find a rock?
Early Reader · Change the reading level on the articlePost-glacial rebound
Long ago, heavy ice sat on the land. The ice was very, very heavy. It pushed the land down low. Now the ice is gone. The land is slowly rising up. It is like a sponge coming back. Do you see the land rise?
Early Reader · Change the reading level on the articlePostojna Cave
A river made this big cave. It is very long and dark. You can ride a train inside. Small animals live in the water there. It is a fun place to visit. Do you want to go inside?
Early Reader · Change the reading level on the articlePotash
Potash helps plants grow. It is a kind of salt. People find it deep in the ground. It helps food grow for us. It is very helpful! Do you like eating plants?
Early Reader · Change the reading level on the articlePrachov Rocks
Tall rocks stand in a far land. Rain and wind made them. They look like big animals. One looks like an elephant. Some rocks look like birds too. You can see them in films. Do you see a bird in the rocks?
Early Reader · Change the reading level on the articlePrevailing winds
Wind often blows from one way. It moves in big patterns. This helps move clouds and dust. It can even move sand. The wind helps us know the weather. Do you feel the wind today?
Early Reader · Change the reading level on the articleProglacial lake
Big ice can make a lake. Melting ice fills up a space. Rocks can hold the water in. This makes a new lake. It is very pretty to see. Have you ever seen a lake?
Early Reader · Change the reading level on the articlePromontory
A promontory is high land. It sticks out into water. It can be made of hard rock. People build forts on them. This helps keep them safe. It is a good place to stay. Can you find one?
Early Reader · Change the reading level on the articleProterozoic
A long time ago, Earth changed. way more air grew in the sky. This helped new life start to grow. It made the world a busy place. We can see old bones in rocks. Do you like looking at old rocks?
Early Reader · Change the reading level on the articlePsilomelane
This is a hard black rock. It looks very smooth and shiny. It comes from deep in the earth. People use it for many things. It is a special kind of stone. Do you like shiny rocks?
Early Reader · Change the reading level on the articlePuddle
A puddle is a little pool of water. It forms when it rains. It can be in a hole. Small birds use it to drink. It is fun to splash in! Do you like to jump in them?
Early Reader · Change the reading level on the article