4th grade-ch. 8 lesson 1 what are minerals
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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