Jorge and Ruchi are trying to determine the identify of two minerals given to them by their teacher. What method would help them to do this? A. Try to scratch the samples with a sharp piece of quartz

B. Hold a sample on each hand and determine which has more mass.

C. Place the samples in boiling water and compare the color of the water.

D. Drop the samples and compare the time it takes for them to reach the ground.

C would be the most effective.

Explanation:

Scratching the minerals with quartz would not be the correct way of finding the hardness, you should scratch the mineral on glass instead. Holding the samples in each hand is ineffective since you would have to assume which has more mass. Dropping the samples would not change anything since they would hit the ground at the same time.

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