Trees are very important to life on Earth. They give us oxygen to breathe and shade to keep us cool. Birds and animals live in their branches. Trees also help stop soil from washing away. When we plant trees, we help the planet.

The Arctic is one of the coldest places on Earth. It is covered with ice and snow most of the year. Polar bears, seals, and Arctic foxes live there. In the summer, the sun shines almost all day.

Tornadoes are strong, spinning columns of air. They can destroy buildings and trees. Tornadoes usually form during big storms. People stay safe by going to a basement or an inside room.

The moon orbits around the Earth. It changes shape each night, and we call these shapes moon phases. The full moon is the brightest and easiest to see. Long ago, people used the moon to tell time.

The ocean is the largest habitat on Earth. It covers more than two-thirds of the planet. Many animals like whales, sharks, and fish live there. The ocean also helps control the Earth’s temperature.

Rainbows form when sunlight passes through raindrops. The light bends and shows seven colors. These colors are red, orange, yellow, green, blue, indigo, and violet. You can often see a rainbow after it rains.

The Great Wall of China is one of the longest structures in the world. It was built hundreds of years ago to protect the country from enemies. The wall stretches over mountains and valleys. Today, it is a famous place for tourists to visit.

Recycling helps keep the Earth clean and healthy. We can recycle paper, plastic, glass, and metal. Recycling saves energy and resources. It also keeps trash out of the ocean and landfills.

The sun is the center of our solar system. It gives light and heat to all the planets. Without the sun, Earth would be dark and cold. Plants need sunlight to make food through photosynthesis.

Frogs live near ponds, lakes, and rivers. They start as eggs and then turn into tadpoles. Tadpoles have tails and live in the water. When they grow up, they lose their tails and grow legs. Adult frogs can jump high and eat insects.

Butterflies begin life as tiny eggs. They hatch into caterpillars that eat and grow. After that, they form a chrysalis and change inside it. When they come out, they have colorful wings. This amazing change is called metamorphosis.

Space is full of stars, planets, and comets. Astronauts use rockets to travel beyond Earth. They study space to learn how our universe works. Space has no air, so astronauts wear special suits to breathe.

Deserts are dry places with little rain. The days are hot, but the nights can be very cold. Cactus plants grow in deserts and store water inside. Many desert animals hide during the day to stay cool.