kamilat08
Answered

Lewis has the collection of minerals shown in the picture below.He knows that a harder mineral will scratch a softer mineral. He wants to design an experiment that will answer the following question:

Which of the minerals in the collection have a greater hardness than a rock made of marble?

Which of these is a fair test that he could do to answer the question?
A.
Separate the minerals into light and dark colors, and then try to scratch the marble with the light colored minerals.
B.
Separate the minerals into ones that feel heavier and lighter, and then try to scratch the marble with the heavy minerals.
C.
Try to scratch the marble with each of the minerals, and group the minerals that do scratch the marble together.
D.
Try to scratch the pink quartz with each of the minerals, and group the minerals that do not scratch the pink quartz together.

Answer :

quasarJose

Answer:

C.

Try to scratch the marble with each of the minerals, and group the minerals that do scratch the marble together.

Explanation:

A fair test would be to try scratching the marble with each of the minerals in her group and see the outcome.

The ones that scratch the other is harder and scratched one is less hard.

Since marble is known, any mineral that scratches it is harder and those ones that do not scratch it are less harder.

The moh's scale of hardness gives us good clue into the hardness of mineral with Talc being the least hard and diamond the hardest of all.

pinkb5459

Answer:

C

Explanation:

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