Mineral Properties and Rock Classification Worksheet

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

• hornblende

• hematite

• galena

• magnetite

The sandstone on the side of a 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.

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

• The mineral's color might change.

• Many minerals are the same color.

Which of these is an example of chemical weathering?

• Acid rain reacts with rocks, creating a new substance that slowly breaks apart the rocks.

• Water repeatedly freezes and thaws in the cracks of a rock, eventually splitting the rock into pieces.

• A glacier grinds rock into pieces.

• A tree's roots grow in the cracks of a rock, slowly breaking it apart.

What process creates river deltas and sand dunes?

• chemical weathering

• deposition

• mineralization

• physical weathering

Why might scientists use a microscope to study a mineral?

• to identify its crystal shape

• to see its streak

• to study its nutritional value

• to check its reaction to vinegar

What science fair project could you create using a set of satellite photos that show the Florida coastline over the last 10 years?

• finding sedimentary rock layers

• measuring the spread of metamorphic rocks

• determining the rate of chemical weathering

• studying erosion patterns on beaches

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

• streak

• texture

• cleavage

• hardness

Which statement best describes all minerals?

• All minerals are hard.

• All minerals have a crystal structure.

• All minerals are metals.

• All minerals have a shiny luster.

The pictures show a rock changing over time. What process best describes what is happening to this rock?

• weathering by acid rain

• weathering by plant roots

• weathering by wind

• weathering by water and ice