N5 Limestone Surface Features Quiz

Limestone is made from ________________

• Sand grains

• decayed remains of plants

• decayed remains of sea creatures

• Bedding planes and joints

Carbonation is ____________________

• Alkaline rainwater which chemically weathers the limestone.

• Acidic rainwater which chemically weathers the limestone.

• CO2 dissolving in rainwater.

• Carbonic acid (H2CO3)

Exposed areas of limestone on the surface allow the water to _____________________

• Flow down through the limestone as it is impermeable

• Flow down through the limestone as it is permeable

• Flow along the surface

• Collect on the surface.

Vertical cracks on the surface are deepened to form _________

• Joints

• Clints

• Grykes

• Bedding planes

How are joints produced?

• Limestone beds drying out, strinking producing joints.

• From Carbonation.

• From glaciers scouring the top soil.

• By swallow holes being filled in.

How does a swallow hole form?

• Joints are widened by chemical weathering and enlarged to form a swallow hole.

• By CaCO3 in the limestone being dissolved, enlarging the joint, forming a swallow hole.

• They are left behind by glaciers.

• The stream flows over impermeable rock until it reaches the surface.

Label the Limestone pavement.

When the water flows through Limestone, it does so until it reaches _________

• The water table

• Impermeable rock

• The surface

• A subterranean stream

When water has flowed through limestone, it reaches the surface at what feature?

• A spring

• A stream

• Intermittent drainage

• A spring line

A dry valley has no surface drainage because ________________________________

• Limestone is an impermeable rock.

• Limestone is a permeable rock.

• It doesn't rain over upland limestone.

• Limestone has joints and bedding planes which allow water to flow through it.