1. ______ to study element 104 because only a few atoms of his substance can be isolated at one time.

2. Maya Angelou’s widely acclaimed autobiography, I know why the Caged Bird sings, is a moving and ______ of her childhood in segregated Arkansas.

3. ______ in cases where special oxidants are used, fires are the result of a fuel rapidly combining with the oxygen in the air.

4. Open-pit mining follows the same sequence of operations ______ mining: drilling, blasting, and loading and removing waste and ore.

5. The term bell-letters is used to denote literary forms that contain _____, such as drama, poetry, essays, and novels.

6. Most leaves are coated with a waterproof _____, or cuticle.

7. _____ hearing aid was a tube called the ear trumpet, a flared tube held up to the ear.

8. Although many contemporary craft objects are not _____, they generally have their roots in function.

9. Plateaus are often referred to as tablelands _____ essentially flat-topped and stand conspicuously above an adjacent land area.

10. Many small birds use new sites for each nesting, _____ large birds often reuse the same nest.

11. Mammals have a larger, more well-developed brain _____ other animals.

12. In 1852 _____ one hundred piano-makers in New York alone.

13. _____ commonly chosen as the first step to a career in public office.

14. In the Osage tribe of Oklahoma, beaded belts _____ who held a high social status.

15. Groups of muscles in the head direct the actions necessary for _____.