Rocks and Minerals Review

A mineral breaks into flat surfaces as shown. Which property is shown in the diagram?

• streak

• texture

• cleavage

• hardness

A mineral sample is black and has a rank of 6 on the Mohs hardness scale. It has a silky luster. Use the table to identify the mineral.

• hornblende

• hematite

• galena

• magnetite

Your friend tells you the statue has a dull luster. What does luster tell you about a mineral?

• the color it makes when rubbed against a hard surface

• how hard the mineral is

• what color the mineral is

• how light is reflected from the surface of the mineral

The sandstone on the side of the cliff shows layers of different colors. What is the likely classification for sandstone?

• igneous rock

• metamorphic rock

• volcanic rock

• sedimentary rock

A scientist observes that a mineral is yellow. Why does she have to look at its other properties before she can identify it?

• The mineral might look different when viewed under different light.

• Many minerals are the same color.

• Minerals cannot be identified until they are tested with chemicals.

• The mineral's color might chnage.

Why do scientists perform the streak test on a mineral?

• to help find uses for it

• to help harden it

• to help identify it

• to help change its color

Tara incorrectly recorded her observations about three main ways rocks form.

How should Tara revise her observations so that the information is correct?

• She should revise all three observations.

• She should switch the observations for sedimentary and metamorphic rocks.

• She should revise the observation for metamorphic rocks.

• She should switch the observations for igneous and sedimentary rocks.

What are the physical properties of minerals?

(Select all that apply)

• Color

• Size

• Streak

• Cleavage

• Hardness

A scientist rubs two minerals against each other to see if one of the minerals can scratch the other mineral. What property is the scientist testing?

• Cleavage

• Streak

• Hardness

• Luster

What physical property is being tested in this image?

• color

• Luster

• Streak