Across
- 2. When two objects crash into each other.
- 3. To send a spacecraft into space.
- 4. To study something in detail.
- 5. The path a planet takes around the sun.
- 6. To find the size or amount of something.
Down
- 1. To find something new or unknown.
- 3. To travel through an area to learn about it.
- 4. To watch or notice something carefully.