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15 questions
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- 1. Multiple Choice
Which material is the most difficult to produce?
Plastic
Metals
Glass
Wood
- 2. Multiple Choice
Which metal is this video about?
Iron
Silver
Gold
Copper
- 3. Multiple Choice
When did the Copper Age begin?
2000 years ago
5000 years ago
10000 years ago
7000 years ago
- 4. Multiple Choice
What is the distinctive color of many forms of copper ores?
Red
Blue
Yellow
Green
- 5. Multiple Choice
How is copper refined in this video?
Electrorefining
Electroforming
Electroplating
Electrowinning
- 6. Multiple Choice
What dissolved the copper ore?
Sulfuric acid
Acetic acid
Hydrochloric acid
Nitric acid
- 7. Multiple Choice
What was the negative electrode during the electrowinning process?
Aluminum
Copper
Stainless steel
Zinc
- 8. Multiple Choice
What was used to melt the remaining copper off the steel cathode?
Oven
Incinerator
Kiln
Furnace
- 9. Multiple Choice
What was the final yield of copper?
1.5 pounds
2 pounds
1 pound
0.5 pounds
- 10. Multiple Choice
What was the total cost to extract the copper?
$500
$600
$400
$300
- 11. Multiple Choice
What metal are they planning to use more primitive methods to refine?
Gold
Silver
Iron
Copper
- 12. Multiple Choice
What did they preheat the muffin pan before pouring the molten copper?
Microwave
Furnace
Oven
Kiln
- 13. Multiple Choice
How did they dig the copper ore from the mine?
Bucket
Pickaxe
Shovel
Trowel
- 14. Multiple Choice
How did they they collect the copper sulfate solution?
Sieve
Filter paper
Strainer
Cheesecloth
- 15. Multiple Choice
How did they measure the concentration of copper in the ore?
Atomic absorption spectrometer
Colorimeter
Flame photometer
Spectrophotometer
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