graded quiz: basics of earth science 0:04:41 elapsed based on the mohs hardness scale, which mineral could…

graded quiz: basics of earth science 0:04:41 elapsed based on the mohs hardness scale, which mineral could be scratched by a penny but not by a fingernail? a) talc b) fluorite c) gypsum d) calcite

graded quiz: basics of earth science 0:04:41 elapsed based on the mohs hardness scale, which mineral could be scratched by a penny but not by a fingernail? a) talc b) fluorite c) gypsum d) calcite

Answer

Answer:

D. Calcite

Explanation:

Step1: Identify nail hardness

The hardness of a fingernail is 2.5 on the Mohs Hardness Scale.

Step2: Identify penny hardness

The hardness of a copper - penny is 3.5 on the Mohs Hardness Scale.

Step3: Analyze each option

Talc has a hardness of 1, can be scratched by both. Fluorite has a hardness of 4, can't be scratched by either. Gypsum has a hardness of 2, can be scratched by both. Calcite has a hardness of 3, can be scratched by a penny but not by a fingernail.