1. Coral reefs are _____ that teem with an abundance of exotic sea life.

2. During adolescence many young people begin to question _____ held by their families.

3. _____ “as the census taker of the sky”Annie Jump Cannon contributed considerably to the field of astronomy.

4. Perhaps the primary _____ of adult education was industrialization, which accelerated the pace of socioeconomic change.

5. Magnesium has a specific gravity of 1.74, which means that _____ 1.74 times as much as an equal volume of water.

6. Alaska found the first years of its statehood costly because it had to take over the expense of services _____ previously by the federal government.

7. In bas-relief sculpture, a design projects very slightly from its background, _____ some coins.

8. The Chisos Mountains in Big Bend National Park in Texas were created by volcanic eruptions that occurred _____.

9. _____, the Canadian composer Barbara Pentland wrote four symphonies, three concertos, and an opera, among other works.

10. Mango trees, _____ densely covered with glossy leaves and bear small fragrant flowers, grow rapidly and can attain heights of up to 90 feet.

11. The face is the most _____ of a human being.

12. The midge, _____ to any of several species of small flies, refers to a mosquito-like insect with slender wings and body, long legs, and antennae.

13. The Arctic fox is found throughout the Arctic, usually on tundra or mountains _____ the sea.

14. Pig iron, wrought iron, and steel contain iron carbides made up of _____ of carbon.

15. __of pottery is dependent on the durability of clay after firing.