6.6 A,B &C

Refer to the above Mohs Hardness Scale table. Which of the following is a correct statement about a mineral with a hardness rating of 7?

• A. The mineral can scratch Apatite and every mineral with a hardness scale number lower than 7.

• B. The mineral cannot be scratched by Apatite, but can be scratched by Feldspar.

• C. The mineral can scratch Calcite, but cannot scratch Apatite.

• D. The mineral can scratch Apatite and every mineral with a hardness scale number higher than 7.

A student measured the mass and volume of a metal sample using a triple beam balance and a graduated

cylinder. The sample has a mass of 16.7 grams and a volume of 4.4 cm3

.

What is the density of the metal sample rounded to the nearest tenth?

How would you classify sample 3 on the table above?

• A. Conductor

• B. Yellowish, dull, solid

• C. Silvery solid, partially malleable/ductile

• D. Brittle

A student measures the mass and volume of a small cube made of an unknown metal. The mass of the cube is 25.0 g, and the volume of the cube is 3.19 cm3. The student is told that the cube is a sample of one of the four metals listed in the table.

Based on the data given, the unknown metal is most likely -

• A. gold

• B. iron

• C. silver

• D. tin

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NGSS.MS-PS1-2

Hematite is a mineral that comes in a variety of colors including black, grey, silver, brown and red. A streak test is used to help determine the identity of hematite.

Why would a streak test be conducted on hematite to determine its identity?

• A. The streak changes depending on the color of hematite.

• B. The streak is the same color no matter the color of the hematite.

The mass of an unidentified rock is 15.5 grams. Students determine the volume of the rock by placing the rock in

a cylinder with water. The students calculate the density of the rock. They determine the identity of the rock based

on the density ranges in the table.

The students most likely have which type of rock?

Using the hardness scale below, which would be the hardness of a mineral that can be scratched by Quartz but not by a Apatite?

• A. 8

• B. 7

• C. 6

• D. 5

Which unknown substance is most likely carbon?

• A. Substance 1

• B. Substance 2

• C. Substance 3

• D. Substance 4

A student found a pretty rock while hiking with her family. She discovered that the rock will scratch glass, but not

her steel knife.

According to Mohs Hardness Scale shown above, what does the student know about the rock?

• It is harder than quartz, but softer than topaz.

• It is harder than corundum, but softer than gypsum.

• It is harder than calcite, but softer than fluorite.

• It is harder than fluorite, but softer than quartz.

Malleability is ___________

• the way light is reflected off a surface.
• how well a piece of matter conducts electricity
• A.  the capability of being drawn out into thin wires or threads.
• the capability of being hammered out thin.