Science Quiz 19

Forms most of the Earth’s crust under the continents

• Conglomerate

• Granite

• Obsidian

• Pumice

Floats

• Chalk

• Obsidian

• Slate

• Pumice

Shiny black rock used for arrowheads

• Sandstone

• Marble

• Obsidian

• Shale

Made from layers of sand

• Pumice

• Obsidian

• Sandstone

• Sand

Pebbles or cobbles cemented together

• Conglomerate

• Slate

• Shale

• Sandstone

Made from seashells

• Chalk

• Slate

• Marble

• Limestone

Used to write on blackboards

• Slate

• Chalk

• Obsidian

• Conglomerate

Made from mud or clay

• Slate

• Shale

• Sandstone

• Marbles

Used to make the Washington Monument

• Chalk

• Conglomerate

• Marble

• Limestone

Used for blackboards

• Shale

• Slate

• Granite

• Pumice