This Planet Really Rocks!

Name That Rock!

Directions:

  1. Study the 10 Rocks below.
  2. Click on each thumbnail to view a larger version of the rock.
  3. Study the clues.
  4. Name that rock.
  5. For more help, search the contents of this website.
  6. Good Luck!

Rock #

Images

Clues

Answer Choices

1

Most common mineral
Used in clocks and watches
Hardness of 7

Quartz
Calcite
Pyrite

2

Metamorphic Rock
Is Foliated
Resembles Granite

Slate
Gneiss
Marble

3

Mineral
Hardness of 1
Used in baby powder

Gypsum
Calcite
Talc

4

Mineral
Hardness of 3
Used in cement

Gypsum
Calcite
Feldspar

5

Sedimentary Rock
Can contain fossils
Color ranges from white to gray

Limestone
Sandstone
Shale

6

Sedimentary Rock
Usually made of quartz
Visible layers

Conglomerate
Shale
Sandstone

7

Metamorphic Rock
Nonfoliated
Used in building the Taj Mahal

Slate
Quartzite
Marble

8

Igneous Rock
Looks like glass
Comes from volcanoes

Basalt
Obsidian
Scoria

9

Igneous Rock
Large crystals
Used in Buidlings and Monuments

Granite
Scoria
Pumice

10

Metamorphic Rock
Nonfoliated
Made from sandstone

Slate
Pumice
Quartzite




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