Limestone

What is the chemical formula of calcium carbonate

• Ca₂CO₃
• Ca(CO)₃
• CaCO₃
• CaCO

Limestone is composed mainly of a mineral called calcium carbonate.

• True

• False

Limestone is NOT usually formed under water.

• True

• False

Limestone is an impermeable rock.

• True

• False

Limestone can be slowly dissolved by rainwater or groundwater.

• True

• False

This feature is formed when calcium carbonate is deposited on the ceiling of a cave.

• stalagmite

• sink hole

• stalactite

• pillar

This feature is formed when the roof of an underground cavern collapses.

• stalagmite

• sink hole

• stalactite

• pillar

This feature is formed when calcium carbonate is deposited on the floor of a cave.

• stalagmite

• sink hole

• stalactite

• pillar

When a stalactite and a stalagmite meet they form a new feature known as a:

• cave

• stalactomite

• cockpit

• pillar

Sometimes a large underground hollow or passage called a _________ is formed as water wears away limestone.

• underground river

• cave

• cockpit

• karst landscape