Earth and Life

Answer five source-reviewed questions and use feedback to correct missed answers.

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1. Which is the longest bone in the human body? Femur Scapula Fibula Ulna

2. What is the thin, outermost layer of the Earth? Crust Exosphere Mantle Outer Core

3. The element involved in making human blood red is which of the following? Iron Copper Iridium Cobalt

4. About what percentage of the Earth's surface is water? 70% 30% 50% 90%

5. What is the unit of electrical resistance? Ohm Mho Tesla Joule

earth, plant

Questions adapted from Open Trivia Database contributors.

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