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 17 of 30
Long ago, the Earth was very cold. Big sheets of ice covered the land. This happened because the air changed. The air change made the world chillier. Many tiny living things could not live anymore. It was a very big…
Early Reader · Change the reading level on the articleA big storm hit the coast. It brought very strong winds. It also brought much water. The water flooded many homes. This was a very hard time. Many people had to leave. Can you imagine a big storm?
Early Reader · Change the reading level on the articleA big storm named Maria hit islands. It had very strong winds. The wind broke many homes. It also took away the power. Many people had to leave. It was a very hard time. Have you ever seen a big storm?
Early Reader · Change the reading level on the articleHot water comes out of the sea floor. It looks like dark smoke. It makes tall chimneys. Many small animals live there. They eat things from the water. It is a busy place. Do you want to see it?
Early Reader · Change the reading level on the articleWe can measure our world. Some parts are high up. Some parts are deep down. This helps us see the land. It also helps us see the sea. It is a big job. Do you want to see the Earth?
Early Reader · Change the reading level on the articleA long time ago, there was a big sea. It sat between big lands. The lands moved closer and closer. Soon, the sea was gone. Now, the lands are joined. Can you find a map of the world?
Early Reader · Change the reading level on the articleIce is very bright. It acts like a mirror. It bounces sunlight away. This helps keep Earth cool. But when ice melts, the dark water soaks up heat. This makes things even warmer. Can you see the white ice?
Early Reader · Change the reading level on the articleScientists find long tubes of ice. They pull them from deep snow. The ice holds old air. It tells us about the past. We can learn how the Earth was. Do you like ice?
Early Reader · Change the reading level on the articleIce crystals are tiny bits of ice. They can have many shapes. Some look like plates. Some look like needles. They make clouds in the sky. They can even make a halo. Can you see them in the sky?
Early Reader · Change the reading level on the articleThis is a clear stone. It looks like glass. It can make things look double. Long ago, people used it to find the sun. It is very pretty. Can you see two things through it?
Early Reader · Change the reading level on the articleIce pellets are tiny balls of ice. They fall from the sky. They look clear and hard. They make a tap sound when they hit. They can bounce on the ground. Have you seen them before?
Early Reader · Change the reading level on the articleRain turns to ice in a storm. It falls as cold water. Then it freezes on trees and wires. The ice is very heavy. It can break things. Have you seen ice on a branch?
Early Reader · Change the reading level on the articleIcicles are spikes of ice. They form when water drips and freezes. Water can drip from roofs or cliffs. They grow longer as more water falls. Watch them from a safe place. Do you like to see ice?
Early Reader · Change the reading level on the articleHot melted rock lives deep down. It can change as it cools. It grows tiny hard bits. These bits fall out. Then the liquid changes. This makes new kinds of rock. Do you like rocks?
Early Reader · Change the reading level on the articleHot liquid rock moves under the ground. It pushes into other rocks. The liquid cools down very slowly. It turns into hard rock. This makes new shapes in the earth. Can you find rocks like this?
Early Reader · Change the reading level on the articleThis is a black rock. It is very heavy. It is used to make white paint. It helps make your paper white, too. It is a very useful thing. Can you find something white?
Early Reader · Change the reading level on the articleSometimes autumn is warm. It is not cold yet. The sun feels very good. It feels like summer again. This can help us feel happy. Do you like warm fall days?
Early Reader · Change the reading level on the articleThe Earth has big pieces of land. These pieces move very slowly. One big piece holds India and Australia. It may be breaking into smaller parts now. This helps make big mountains. We live on these moving pieces. Can…
Early Reader · Change the reading level on the articleInge was a smart scientist. She studied the Earth. She found a solid part deep inside. It is in the middle of our world. This helps us know our home. Can you imagine being so deep?
Early Reader · Change the reading level on the articleMany countries work together. They help ships stay safe. They make maps of the deep blue sea. These maps show where to go. This helps everyone on the water. Do you like looking at maps?
Early Reader · Change the reading level on the articleThe ground can shake. Big pieces of Earth move. They rub against each other. This makes a big shake. It can even make big waves. This is how the Earth moves. Do you feel the ground shake?
Early Reader · Change the reading level on the articleThe shore changes with the tide. Sometimes the water is high. Sometimes the water is low. Many sea animals live here. You can see crabs and stars. It is a busy place! Do you like the beach?
Early Reader · Change the reading level on the articleA belt of clouds wraps the Earth. It stays near the middle of the world. This place has many storms. It brings lots of rain. The winds can be very still here. Do you like the rain?
Early Reader · Change the reading level on the articleThe ground can shake. Most shakes happen at the edges of big plates. But some shakes happen in the middle. These can be very strong. They can hurt buildings. Have you ever felt the ground move?
Early Reader · Change the reading level on the articleHot melted rock stays under the ground. It cools down very slowly. This makes big, shiny bits in the rock. You can see these bits with your eyes. It is a cool part of our Earth. Do you like looking at rocks?
Early Reader · Change the reading level on the articleA high part of the air is special. It is far above us. The sun helps make it. It helps radio signals travel far. This helps us talk to people. Can you see the sky?
Early Reader · Change the reading level on the articleThis is a big volcano. It is in a place called Costa Rica. It has a green lake at the top. You can see birds and foxes there. It is a very high mountain. Can you see the clouds?
Early Reader · Change the reading level on the articleIronstone is a hard rock. It can be brown on the outside. People use it to build walls. It can even be used for art. It is a very special stone. Do you want to find some?
Early Reader · Change the reading level on the articleThe Earth's skin floats. It sits on soft rock. It is like a big ice cube. The ice floats in water. Heavy things sink low. Light things stay high. Can you see the mountains?
Early Reader · Change the reading level on the articleScientists look at tiny parts of rocks. These parts tell us how old a rock is. They can even tell us about old water. This helps us learn about our world. It is like being a detective. Do you want to find clues too?
Early Reader · Change the reading level on the articleAn isthmus is a thin strip of land. It joins two big pieces of land. Water is on both sides of it. This helps people move across the sea. It is a very cool shape. Can you find one on a map?
Early Reader · Change the reading level on the articleA long crack runs through Japan. It goes through many towns. It is a place where the ground can shake. This can make the earth move. It is a big part of our world. Can you feel the ground shake?
Early Reader · Change the reading level on the articleDeep in the sea, the ground moves. It makes big islands. It also makes a very deep hole. This hole is the deepest on Earth. It is very, very deep. Do you want to see it?
Early Reader · Change the reading level on the articleJacques Piccard loved the deep sea. He built boats to go under the water. He went to the very bottom of the ocean. It was a very big trip. He saw a flat fish down there. Do you like the ocean?
Early Reader · Change the reading level on the articleJames Hansen studies the air. He looks at how the Earth stays warm. He wants to keep our world safe. This helps us all. Do you like to look at the clouds?
Early Reader · Change the reading level on the articleJames was a smart man. He studied the Earth. He thought our world acts like one big living thing. This helps keep us safe. He made tools to help us learn. Do you like to learn about our world?
Early Reader · Change the reading level on the articleJapan has a very long line. It is a crack in the ground. This line joins two parts of the land. It can make the earth shake. We must be careful. Do you see the line on the map?
Early Reader · Change the reading level on the articleSome rocks are dark yellow. They can look like flowers. These rocks form in wet places. They are found on Earth and Mars. They help us learn about space. Do you like looking at rocks?
Early Reader · Change the reading level on the articleJasper is a pretty stone. It can be red, green, or brown. Some stones even have spots. People use it to make art. It can be made into a vase. Do you like bright colors?
Early Reader · Change the reading level on the articleA man named Guettard loved nature. He looked at rocks and plants. He made a map of the ground. This map showed where rocks live. He even found old volcanoes. He was a great thinker. Can you find rocks outside?
Early Reader · Change the reading level on the articleThere are big caves in a place called Jeita. A river flows inside them. You can ride a boat to see it. The caves have pretty stone shapes. They are very big and cool. Do you want to go inside?
Early Reader · Change the reading level on the articleThese are very old caves. They are in Australia. The caves have pretty white rocks. They are a special place to visit. You can see them with lights. Do you want to go inside?
Early Reader · Change the reading level on the articleThere is a big cave in the ground. It has bright crystals on the walls. The cave even breathes air in and out. You can see it on a tour. It is a very special place. Do you want to go inside?
Early Reader · Change the reading level on the articleJohn Wilson studied the Earth. He learned how the ground moves. He found out that big pieces of land slide. This helps us know how islands grow. He was a great teacher. Do you like to look at rocks?
Early Reader · Change the reading level on the articleRocks can have cracks in them. These cracks do not move. They can look like long lines. Some cracks make tall shapes. These shapes look like stone poles. Do you see cracks in rocks?
Early Reader · Change the reading level on the articleThis is a huge ice field. It is in a land called Norway. It is the biggest one in Europe. It stays big because it snows a lot. You can see it in the mountains. Do you like the cold?
Early Reader · Change the reading level on the articleA big piece of Earth moves. It sits under the sea. This piece slides under our land. It can make volcanoes and shakes. This helps us learn about our world. Do you like to learn about Earth?
Early Reader · Change the reading level on the articleThe Junggar Basin is a big land. It is in a place called China. It is far from the sea. Many mountains are all around it. It has oil and coal under the ground. It is a very special place! Can you find it on a map?
Early Reader · Change the reading level on the article