Ch. 8 Lesson 1What are minerals?

Activity-How can you classify rocks and minerals?

1. Observe the rock and mineral samples with a hand lens.

2. Describe the samples.

3. Tell how the samples are alike and different.

4. Classify the samples into 2-4 groups.

minerals

naturalnonliving

solid crystals

make up rocks

each has particular shape

rock-formingminerals (ex. mica)

Each mineral has a

particular shape.

physical properties of minerals

description

color easiest to see

luster way mineral’s surface reflects light

hardness use Mohs scale

streak color of mineral’s powder when scratched on special plate

Luster

Tourmaline has aTourmaline has aglassy luster. glassy luster.

Gold has a metallic luster.Gold has a metallic luster.

Talc has a pearly luster.Talc has a pearly luster.

MetallicMetallic

GlassyGlassy

Waxy Waxy

Greasy Greasy

PearlyPearly

DullDull

Silky Silky

Earthy Earthy

the higher the higher the number, the number, the harder the harder the mineral the mineral

scale that ranks minerals from softest to hardest: scale that ranks minerals from softest to hardest:

talc

1.

diamond

10.

Name of mineral

Color of mineral

Color of streak

Luster

amethyst

brownstone

calcite

citrine

granite

hematite

limestone

malachite

mica

pyrite