Pick the Best Choice by Estimating

question 21

Multiple Choice

Pick the best choice by estimating. Do not measure. For metric measurements, do not attempt to convert to the U.S. system. The hardest part of the transition to the metric system is the transition to thinking in metrics. The distance from floor to ceiling in a typical home is about __________.

• A) 3 m
• B) 12 m
• C) 0.7 m
• D) 0.3 m
• E) 6.5 m

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Definitions:

Ore

A rock, sediment, or other material that can be mined for a profit.

Mineral Deposit

Concentrated accumulations of minerals from which economically valuable materials can be extracted.

Oxide

1. Any member of a group of minerals that consist of oxygen bonded with a metallic element, like iron. 2. Mineralized rock that contains minerals, especially those of iron and copper, that formed near the surface or in other oxidizing conditions.

Sulfide

A compound characterized by the presence of sulfur bonded with a metallic element or another nonmetal.