Minerals CH 2 Prentice Hall p. 47-54 CH 2 Prentice Hall p. 47-54.
4th Grade-Ch. 8 Lesson 1 What Are Minerals
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Transcript of 4th Grade-Ch. 8 Lesson 1 What Are Minerals
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Ch. 8 Lesson 1What are minerals?
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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.
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minerals
naturalnonliving
solid crystals
make up rocks
each has particular shape
rock-formingminerals (ex. mica)
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Each mineral has a
particular shape.
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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
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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
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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:
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talc
1.
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diamond
10.
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Name of mineral
Color of mineral
Color of streak
Luster
amethyst
brownstone
calcite
citrine
granite
hematite
limestone
malachite
mica
pyrite