| 1. The ability to _______________ is one of the distinguishing characteristics of living things. | | |
| 2. Dian Fossey spent a number of years _______________ gorillas in the wild. | | |
| 3. An insect called a millipede has 4 legs on each _______________ of its body. | | |
| 4. The cheetah can accelerate to 70 kilometres per hour in two seconds. | | |
| 5. All _______________ exists in three states: solid, liquid and gas. | | |
| 6. He is a very _______________ man, with degrees in both history and geography. | | |
| 7. The bloodstream serves to distribute oxygen to all the _______________ of the body. | | |
| 8. Certain insects contain 30 percent more _______________ than beef. | | |
| 9. Kepler proposed the last of his three laws of planetary _______________ in 1618. | | |
| 10. Getting x-rays done at the dentist _______________ a great deal to the cost of a check-up. | | |
| 11. I dropped one of my _______________ because I just didn't have the time to do all the homework. | | |
| 12. A Canadian-made _______________ is being used to observe the melting of the polar ice caps. | | |