Minerals

Friedrich Mohs invented a system

• to smelt two kinds of iron ore.

• to use explosives to find mineral deposits underground.

• to find minerals near the mid-ocean ridge.

• to describe and compare hardness of minerals.

The purpose of heating iron ore to a very high temperature in a blast furnace is

• to add hematite to the final product.

• to eliminate one kind of iron from the iron ore.

• to heat the iron so that it separates from other elements in the ore.

• to cool down the hot furnace.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is a narrow channel or slab of a mineral that is different from surrounding rock?

• fracture

• vein

• crystal

• ore

Hard, colorful minerals that have a brilliant or glassy luster are

• crystals

• ores

• metals

• gemstones

Steel is an example of a useful

• ore.

• gemstone.

• alloy.

• crystal.

A mineral that splits apart easily along flat surfaces has the property called

• cleavage.

• crystal shape.

• fracture.

• hardness.

Color alone cannot be used to identify a mineral because

• only a few minerals always have their own characteristic color.

• luster usually hides a mineral's true color.

• the color of most minerals is hidden by veins.

• color and streak are never the same color.

Earthy, shiny, waxy, metallic, and pearly are terms used to describe a mineral's

• streak.

• luster.

• color.

• density.

The size of a mineral's crystals depends on which of the following?

• the mineral's crystal group

• the solution from which the mineral formed

• the smelting process in which the magma formed

• the rate of cooling of the magma or solution from which the mineral formed

Which of the following is NOT one of the six types of crystal shapes?

• cubic

• tetragonal

• triclinic

• metallic