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 15 of 30
Fresh water is water without salt. It is in lakes and rivers. It is also in snow. Most plants and animals need it. We need it to live, too. It is very special. Do you like to swim in it?
Early Reader · Change the reading level on the articleMohs was a man who loved rocks. He made a way to test them. He checked how hard they are. Some rocks are soft. Some rocks are very hard. This helps us know them. Can you find a hard rock?
Early Reader · Change the reading level on the articleThere are big caves in Morocco. They have long tunnels. They have rocks that hang from the top. Some rare plants live there. It is a special place to see. Do you like dark caves?
Early Reader · Change the reading level on the articleHot air comes from the ground. It looks like steam. It comes from deep in the Earth. This can happen near a volcano. It can help us know when a volcano is near. Do you see the steam?
Early Reader · Change the reading level on the articleA funnel cloud looks like a cone. It hangs from a big cloud. It does not touch the ground. It shows us that wind is spinning. This can turn into a tornado. Have you seen a cloud like this?
Early Reader · Change the reading level on the articleThis is a dark rock. It forms deep under the ground. Hot liquid cools down very slowly. This makes the rock hard. It is part of the ocean floor. Do you like rocks?
Early Reader · Change the reading level on the articleOur Earth stays just right for life. Living things help the world. They keep the air and water good. This helps us all live here. It is like a big team. Do you like our home?
Early Reader · Change the reading level on the articleThis is a heavy rock. It is found in the ground. It helps us make metal. People use it for many things. It can even help us hear radio. Do you like shiny rocks?
Early Reader · Change the reading level on the articleThere is a big volcano. It is in a place called Colombia. It can blow out ash. This ash falls from the sky. It helps us learn about Earth. Do you like big mountains?
Early Reader · Change the reading level on the articleA huge river of ice lives in the mountains. It is very long. This ice melts to make a big river. It helps many people. It is a special place. Do you like the snow?
Early Reader · Change the reading level on the articleGarnet is a pretty stone. It can be many colors. Most are deep red. Some are even green! People use them for jewelry. They can also be used for work. Do you like shiny stones?
Early Reader · Change the reading level on the articleEarth moves things around in a big way. Heat moves bits of rock deep down. It can also push hot rock up. This makes new land over a long time. It helps our world stay the same. Can you feel the ground?
Early Reader · Change the reading level on the articleScientists study how rocks and water work. They look at the whole world. They even look at space! This helps us learn about our home. It is very cool to learn. Do you like rocks?
Early Reader · Change the reading level on the articleThe Earth moves deep inside. Hot rocks flow like thick goo. They can also break or bend. This makes mountains and volcanoes. It helps us learn about our world. Do you like to learn about Earth?
Early Reader · Change the reading level on the articleRocks come in many layers. Some layers look the same. They have the same color. They have the same feel. These layers help us learn about Earth. It is like a giant book. Can you find a rock layer?
Early Reader · Change the reading level on the articleThe Earth can change in big ways. Rocks and dirt can slide down hills. Big waves can also move through the sea. These things can hurt homes and land. We study them to stay safe. Do you want to learn more?
Early Reader · Change the reading level on the articleLong ago, Earth had no air to breathe. Then, tiny living things made the air. This air helped more life grow. Now, we breathe this air every day. It helps us stay alive. Do you like to breathe deep?
Early Reader · Change the reading level on the articleThe earth has many parts. Some parts look the same. They can be big mountains. They can be low lands. These parts help us find things. It is a big, cool world. Do you like to look at rocks?
Early Reader · Change the reading level on the articleEarth has many layers of rock. These layers look like a cake. They tell us about long ago. We can find old bones there. It helps us learn about our world. Do you like looking at rocks?
Early Reader · Change the reading level on the articleSome people study our Earth. They look at rocks. They look at how mountains grow. This helps us stay safe. It also helps us find things. Do you like rocks?
Early Reader · Change the reading level on the articleBig mountains grew a long time ago. Land crashed together to make them. They used to be very tall. Now they are much smaller. They are still very pretty. Do you like to hike in the mountains?
Early Reader · Change the reading level on the articleBig mountains called the Himalayas are growing. Two giant pieces of land hit each other. This push makes the land go up high. These mountains give us fresh water to drink. They are very big and tall. Do you like…
Early Reader · Change the reading level on the articleOur Earth has a hidden force. It works like a big magnet. This force can make lights in the sky. The poles of this force move. They change over a long time. Do you want to see the lights?
Early Reader · Change the reading level on the articleEarth has a big pull. It works like a giant magnet. Sometimes the pull flips around. The top and bottom swap. This happened a long time ago. It can happen again. Do you feel the pull?
Early Reader · Change the reading level on the articleThe sun sends big clouds to Earth. These clouds shake our world. They can make the sky glow with pretty lights. They can even shake our power lines. It is a big space show! Do you like bright lights?
Early Reader · Change the reading level on the articleWater and air move in big ways. They flow around our world. They can move in layers. This helps us learn about storms. It helps us know about the sea. It is very cool to watch. Do you like to watch the waves?
Early Reader · Change the reading level on the articleGeorg was a man who loved rocks. He studied how to find metals. He wrote many books about them. His books helped people learn. He was very smart. Do you like to find rocks?
Early Reader · Change the reading level on the articleThe ground gets hot deep down. It is very hot under our feet. This heat stays inside the Earth. We can use this heat for power. It helps us stay warm. Do you want to feel the heat?
Early Reader · Change the reading level on the articleA hot spring can spray water. It is in a place called Iceland. The water gets very hot. It shoots high into the air. This is a fun thing to see. Do you like hot water?
Early Reader · Change the reading level on the articleThere are many stone pillars here. They look like steps. These stones go into the sea. They were made by hot lava. It is a very cool place to see. Do you want to walk on them?
Early Reader · Change the reading level on the articleBig ice moves over the land. It makes deep holes in the ground. Then the ice melts into water. These lakes can be very big. They give us fresh water to use. Have you ever seen a lake?
Early Reader · Change the reading level on the articleA long time ago, there was a big lake. The ice blocked the water. Then the ice broke. Huge floods rushed out. The water moved very fast. It changed the land. Can you imagine a lake that big?
Early Reader · Change the reading level on the articleGlacier Peak is a big mountain. It is a volcano. It can blow out ash. It can make big mudflows. These flows move down the hills. We can see the mountain from far away. Do you like big mountains?
Early Reader · Change the reading level on the articleGlaciers are big rivers of ice. They move very slowly. They form when snow piles up. These ice rivers can change the land. They are very cool to see! Have you ever seen ice?
Early Reader · Change the reading level on the articleSometimes the sun looks less bright. This happens because of dirty air. Tiny bits of dust and smoke float up. They act like little mirrors. They bounce the sun away. This helps keep our world cool. Do you like the…
Early Reader · Change the reading level on the articleThe Earth is made of many parts. Some parts like to stay on top. Some parts sink deep down. Some parts like to be gas. We can group them this way. Do you like to sort things?
Early Reader · Change the reading level on the articleA long time ago, the land was one big piece. It was called Gondwana. This big land held many places we know today. It was very, very large. It even had many plants. Can you find your home on a map?
Early Reader · Change the reading level on the articleRocks can grow in layers. Some layers have big bits on the bottom. The top has tiny bits. This happens when water slows down. It helps us learn about the past. Can you find layers in a rock?
Early Reader · Change the reading level on the articleSome bits of earth are big. Some bits are very small. They can be sand or rocks. We use names to tell them apart. This helps us know the earth. Can you find a small rock?
Early Reader · Change the reading level on the articleThis is a hard rock. It forms deep under the ground. It is made of many colors. People use it to build roads. It was even used for the Rosetta Stone. Have you ever seen a rock like this?
Early Reader · Change the reading level on the articleSome rocks are made deep in the Earth. These rocks get very hot. They also feel a lot of weight. This makes them look like tiny grains. You might see small red spots in them. Do you like looking at rocks?
Early Reader · Change the reading level on the articleTiny snow balls fall from the sky. They look like white beads. They form when water freezes on snow. They are soft and break easily. You can see them on the ground. Do you like the snow?
Early Reader · Change the reading level on the articleEarth pulls on everything. This pull is called gravity. Tools can measure this pull. They help us learn about our world. It is very cool! Can you feel gravity pulling you down?
Early Reader · Change the reading level on the articleEarth pulls on everything. This pull keeps us on the ground. It helps us stay safe. It works even high in the sky. Do you feel the pull? Can you jump high?
Early Reader · Change the reading level on the articleThis is a very big land. It is in a cold place. Many animals live here. You can see a white bear. You can see a fox too. It is a safe home for them. Do you like the snow?
Early Reader · Change the reading level on the articleThe Great Basin is a big desert. It is hot and dry in summer. It is cold and snowy in winter. Many plants and animals live there. It is a very special place. Do you like the desert?
Early Reader · Change the reading level on the articleThis is a big lake. It is very salty. The salt helps you float. Many birds live here. It is a special place. Do you like to swim?
Early Reader · Change the reading level on the articleSome gases trap heat. They stay in the air. The sun warms the Earth. These gases keep us warm. This helps us live here. It is very important. Do you feel the sun's heat?
Early Reader · Change the reading level on the article