Across
- 3. designed to resist the penetration of bullets.
- 6. the process of developing or being developed.
- 9. accept or admit the existence or truth of.
- 10. the height of an object or point in relation to sea level or ground level.
- 12. of or from outside the earth or its atmosphere.
- 15. machinery and equipment developed from the application of scientific knowledge.
- 16. the fact or condition of functioning or being active.
- 18. a political theory derived from Karl Marx, advocating class war and leading to a society in which all property is publicly owned and each person works and is paid according to their abilities and needs.
- 19. relating to the nucleus of an atom.
- 20. in a way that lasts or remains unchanged indefinitely; for all time.
Down
- 1. the work done by, or the occupation of, an engineer
- 2. the forming of a theory or conjecture without firm evidence.
- 4. a deputy or substitute acting for a superior.
- 5. a celestial body orbiting the earth or another planet.
- 7. the action of transporting someone or something or the process of being transported.
- 8. relating to or resembling photographs.
- 10. the air available to aircraft to fly in, especially the part subject to the jurisdiction of a particular country.
- 11. the ability to acquire and apply knowledge and skills.
- 13. a leveled strip of smooth ground along which aircraft take off and land.
- 14. an event or occurrence.
- 17. a vehicle used for space travel.
