Educational worksheet on comets, asteroids, and meteors, designed for students to learn about space objects and their characteristics.

Let’s go step by step to fill in the worksheet correctly.

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Part 1: Understanding Main Ideas — Table

We need to describe each object and say where it is or how it moves.

- Asteroid:
→ Description: A rocky object that orbits the Sun, mostly found between Mars and Jupiter. Not big enough to be a planet.
→ Location/Movement: Mostly in the asteroid belt (between Mars and Jupiter), but some cross Earth’s orbit.

- Comet:
→ Description: Made of ice, dust, and rock. When near the Sun, it heats up and forms a glowing head and tail.
→ Location/Movement: Comes from far out in space (like Kuiper Belt or Oort Cloud). Orbits the Sun in long, stretched-out paths (ellipses).

- Meteoroid:
→ Description: Small piece of rock or metal floating in space — smaller than an asteroid. Often comes from broken comets or asteroids.
→ Location/Movement: Floats in space until it enters a planet’s atmosphere.

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Part 2: Answer Questions on Separate Paper

*(You’ll write these on your own paper — here are the answers for you to use.)*

1. What happens to a meteoroid to become a meteorite?
→ When a meteoroid enters Earth’s atmosphere, friction makes it burn up and glow — that’s called a meteor (“shooting star”). If any part survives and hits the ground, THAT leftover piece is called a meteorite.

2. Parts of a comet:
- Nucleus: The solid center — made of ice, dust, and rock. Like a dirty snowball.
- Coma: The fuzzy cloud around the nucleus when the comet gets close to the Sun. Ice turns to gas and spreads out.
- Head: The bright part at the front — includes the nucleus and coma.
- Tail: Stretches behind the comet as it nears the Sun. Made of gas and dust pushed away by solar wind. Always points away from the Sun.

3. How to tell a meteor from a comet?
→ A meteor is just a quick flash of light in the sky — lasts seconds. It’s a meteoroid burning up in our atmosphere.
→ A comet is visible for days or weeks. It looks like a fuzzy spot with a tail moving slowly across the night sky. Comets are much farther away and bigger.

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Part 3: Building Vocabulary

Choose the best word from the list:
*asteroid, asteroid belt, comet, meteor, meteoroid, meteorite*

4. When a meteoroid enters Earth’s atmosphere, friction causes it to burn up and produce a streak of light called a(n) meteor.
→ *Because “meteor” = the glowing streak we see.*

5. A chunk of ice and dust whose orbit is usually a long narrow ellipse is a(n) comet.
→ *That’s the definition of a comet!*

6. If a meteoroid hits Earth’s surface, it is called a(n) meteorite.
→ *Only if it lands — then it’s a meteorite.*

7. An object that revolves around the sun, but is too small to be considered a planet, is a(n) asteroid.
→ *Could also be dwarf planet, but among choices, “asteroid” fits best.*

8. A chunk of rock or dust in space that usually comes from a comet or an asteroid is called a(n) meteoroid.
→ *Before it hits atmosphere — still in space — it’s a meteoroid.*

9. The region of the solar system between the orbits of Mars and Jupiter is known as the asteroid belt.
→ *Famous place where most asteroids hang out.*

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Final Answer:

Understanding Main Ideas Table:

| Object | Description | Location/Movement |
|------------|--------------------------------------------------|----------------------------------------------------|
| Asteroid | Rocky body orbiting Sun; not a planet | Mostly in asteroid belt (Mars-Jupiter); some cross Earth’s path |
| Comet | Icy body that glows and grows tail near Sun | From outer solar system; elliptical orbits |
| Meteoroid | Small rock/dust fragment in space | Floats in space until entering atmosphere |

Vocabulary Answers:

4. meteor
5. comet
6. meteorite
7. asteroid
8. meteoroid
9. asteroid belt

*(Questions 1–3 should be written on separate paper using explanations above.)*