Exploring Chemistry Chapters 1-2

Question 1

Ancient people hammered the soft, pure iron from _______________ into useful tools.

Answer 1

meteorites

Question 2

Cast iron, steel, and wrought iron differ only in the amount of ____ they contain.

Answer 2

carbon

Question 3

Charcoal is

Answer 3

wood that has been heated without oxygen

Question 4

Which of these forms of iron is the purest?
cast iron, charcoal, steel, or wrought iron

Answer 4

wrought iron

Question 5

Steel is quenched by

Answer 5

heating it in an oven for several days

Question 6

Gold, silver, and _______________ are known as the coinage metals.

Answer 6

copper

Question 7

The seven ancient metals are gold, silver, copper, iron, tin, lead, and _______.

Answer 7

mercury

Question 8

The first metal mentioned in both the Old and New Testaments is

Answer 8

gold

Question 9

Bronze and brass are both alloys that contain

Answer 9

copper

Question 10

Ancient people made musical instruments of

Answer 10

copper alloy

Question 11

The Statue of Liberty has a skin of

Answer 11

copper

Question 12

Another name for mercury is

Answer 12

quicksilver

Question 13

How does carbon from charcoal help during the smelting process?

Answer 13

frees iron from oxygen’s grip by combining with the oxygen