Science A-Z Solar System Crossword Puzzle for educational use.

Problem:

The task is to solve a crossword puzzle related to the solar system. The clues are provided both across and down, and we need to fill in the grid based on these clues.

---

Clues and Solutions:

#### Across:
1. 3. A solid object that travels around a planet; a natural satellite.
- This refers to a moon.
- Answer: MOON

2. 5. The force that pulls all objects toward each other.
- This is gravity.
- Answer: GRAVITY

3. 6. A body in outer space, made of hot gases, that shines in the night sky.
- This describes a star.
- Answer: STAR

4. 8. An irregularly shaped rock that orbits a star.
- This is an asteroid.
- Answer: ASTEROID

5. 9. To revolve around another object.
- This is the verb orbit.
- Answer: ORBIT

6. 10. The center of an object.
- This is the core.
- Answer: CORE

---

#### Down:
1. 1. A space object made of ice and dust that orbits a star and develops a long, bright tail as it nears its star.
- This is a comet.
- Answer: COMET

2. 2. Like Earth; describes planets that are rocky and Earthlike in size.
- These are called terrestrial planets.
- Answer: TERRESTRIAL

3. 4. A very large object that orbits a star.
- This is a planet.
- Answer: PLANET

4. 7. A hole in the ground caused by the impact of an object from space.
- This is a crater.
- Answer: CRATER

---

Filling the Grid:

Using the answers above, let's fill in the crossword grid:

```
1 2 3 4 5 6 7 8 9 10
+-----------------------+
1 | C O M E T |
+-----------------------+
2 | |
+-----------------------+
3 | M |
+-----------------------+
4 | |
+-----------------------+
5 | G R A V I T Y |
+-----------------------+
6 | S T A R |
+-----------------------+
7 | |
+-----------------------+
8 | A S T E R O I D |
+-----------------------+
9 | O R B I T |
+-----------------------+
10| C O R E |
+-----------------------+
```

---

Final Answer:

The completed crossword puzzle is as follows:

```
1 2 3 4 5 6 7 8 9 10
+-----------------------+
1 | C O M E T |
+-----------------------+
2 | |
+-----------------------+
3 | M |
+-----------------------+
4 | |
+-----------------------+
5 | G R A V I T Y |
+-----------------------+
6 | S T A R |
+-----------------------+
7 | |
+-----------------------+
8 | A S T E R O I D |
+-----------------------+
9 | O R B I T |
+-----------------------+
10| C O R E |
+-----------------------+
```

Boxed Final Answer:
\boxed{
\begin{array}{|c|c|c|c|c|c|c|c|c|c|}
\hline
C & O & M & E & T & & & & & \\
\hline
& & & & & & & & & \\
\hline
M & & & & & & & & & \\
\hline
& & & & & & & & & \\
\hline
G & R & A & V & I & T & Y & & & \\
\hline
S & T & A & R & & & & & & \\
\hline
& & & & & & & & & \\
\hline
A & S & T & E & R & O & I & D & & \\
\hline
O & R & B & I & T & & & & & \\
\hline
C & O & R & E & & & & & & \\
\hline
\end{array}
}