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

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

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

4) 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.

5) The face is the most _____ of a human being.

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

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

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

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

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

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

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

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

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

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