Across
- 3. a step by step set of instructions used to complete a task
- 5. able to operate or make decisions without direct human control
- 8. the layer of loose dust and rock on the Moon's surface
- 9. a bowl-shaped dent formed by an impact on the Moon
- 10. the physical features of the land, like hills or craters
- 13. a place on the Moon where astronauts can live and work
Down
- 1. a trained person who travels into space
- 2. the path one object takes as it travels around another
- 4. a machine designed to carry out tasks automatically
- 5. NASA's program to return humans to the moon
- 6. material collected from the Moon for study
- 7. the force that pulls objects toward a planet or moon
- 11. a robot vehicle used to explore the lunar surface
- 12. the event when a rocket lifts off from Earth