📖 Reading Passage: Space Rocks

Our solar system is filled with fascinating objects called space rocks. Three main types of space rocks are asteroids, meteors, and comets. While they may seem similar, each has unique characteristics that make them special.

Asteroids are rocky objects that orbit the Sun, mostly found in the asteroid belt between Mars and Jupiter. They range in size from small pebbles to objects hundreds of miles wide. The largest asteroid, Ceres, is about 584 miles across! Most asteroids are made of rock and metal, and scientists believe they are leftover pieces from when our solar system formed 4.6 billion years ago.

Meteors are what we see when small pieces of space debris enter Earth's atmosphere and burn up, creating bright streaks of light across the sky. People often call them "shooting stars," but they're not stars at all! Most meteors are tiny—about the size of a grain of sand. When a meteor survives its journey through the atmosphere and lands on Earth, it's called a meteorite.

Comets are often called "dirty snowballs" because they're made of ice, dust, and rocky material. They come from the outer edges of our solar system and have long, oval-shaped orbits around the Sun. When a comet gets close to the Sun, the ice begins to melt and creates a glowing tail that can stretch for millions of miles. The famous Halley's Comet visits Earth every 76 years!

Understanding these space rocks helps scientists learn about the history of our solar system and keeps us informed about objects that might come near Earth.

📚 Vocabulary

Orbit: The path an object takes as it travels around another object in space

Asteroid belt: The region between Mars and Jupiter where most asteroids are found

Atmosphere: The layer of gases surrounding Earth

Debris: Scattered pieces of waste or remains

Solar system: The Sun and all the objects that orbit around it

✏️ Comprehension Questions

Halley's Comet visits Earth every _______ years.