Across
- 4. has many different uses
- 5. helpful; good for a purpose
- 7. made at home, not factory-made
- 9. uses computer technology
- 10. powered by the sun
- 12. very modern; using advanced technology
- 13. uses electricity and technology
Down
- 1. works by itself, without human control
- 2. not new; used by someone else before
- 3. does not let water in
- 6. good for the environment
- 8. from nature; not artificial
- 10. uses technology to work intelligently
- 11. made from previously used materials