1. Technology is making our kids__________. Children have become less likely to play outside. (active) 2. The Saturn V is the largest and the most___________ rocket ever made. (power) 3. The term UFO or___________ flying object refers to a suspected alien spacecraft. (identify) 4. Astronomer Clyde Tombaugh made the remarkable___________ of Pluto in 1930. (discover) 5. Astronauts float around in the space shuttle because they are___________. (weight) 6. Mars is a focal point of modern space___________. (explore) 7. Titan’s atmosphere is___________, so if you were on Titan you would need a breathing mask. (breathe) 8. There are thousands of UFO___________ reported every year. (sight) 9. Mars is called the Red Planet because of its some___________ surface. (red) 10. Scientists discovered that Mars had some ___________to Earth. (similar) 11. The space shuttle span___________ when it hit space debris. (controllable) 12. Australian__________ have developed a technology that could make all plastic recyclable. (science) 13. Astronomers have discovered a__________ system containing at least five planets. (planet)