Minerals 2025

Which statement is best supported by the Mohs Hardness Scale?

• An iron nail has fluoride in it.

• A streak plate is made of quartz.

• Topaz is harder than a steel nail.

• Apatite is softer than a copper penny.

Which of the following statements are TRUE?

I. Rock is a mixture of one or more minerals

II. A mineral is a mixture of many rocks

III. Minerals are solid

IV. Rocks and minerals are naturally formed

• I and II

• I, III and IV

• Only IV

• All of the above

Using Moh's Hardness Scale, identify the mineral that can scratch calcite but not apatite. Name the mineral.

• Fluorite

• Quartz

• Gypsum

• Diamond

The faster magma cools, the smaller the crystals that form in the rock (less texture). Which rock formed from magma that cooled very rapidly?

• syenite

• granite

• obsidian

• pegmatite

How are rocks different from minerals?

• A. Rocks are pure substances, minerals are mixtures.

• B. Rocks have no properties similar to minerals.

• C. Rocks are made of at least two minerals, minerals are not made of rocks.

• D. Minerals are made of at least two rocks, rocks are not made of minerals.

Cement, brick, steel, and glass are not classified as minerals because:

• they are organic

• they are not naturally occurring

• they are too hard

• they have many uses.

What best describes a mineral?

• Substance made in a factory that is solid and liquid.

• A substance made of gas and organic materials.

• A naturally occurring, inorganic solid with a crystal structure and chemical composition.

• A solid made from cake ingredients.

Ms. Jones is teaching about rocks and minerals using a rainbow chocolate chip cookie. She explains the cookie is like a rock and points to the chocolate chips. What do the chocolate chips represent?

• Fossils

• Gems

• Minerals

• Rocks

What is the best title for this table?

• How to Identify a Rock

• Properties of an Element

• Properties of a Compound

• How to Identify a Mineral

Identify a glassy, pink mineral that can scratch glass. It is MOST LIKELY:

• calcite

• mica

• gypsum

• quartz