Waterfall

What is 'hydraulic action' in geographical terms?

• When water dissolves minerals from rocks

• When rocks and pebbles hit each other, breaking into smaller pieces

• When air bubbles are forced into cracks, shattering the rock

• When rocks carried by water wear the land away

What does 'abrasion' refer to in river processes?

• The breaking of rocks into smaller, rounded pieces

• The shattering of rocks by air bubbles

• The wearing down of land by rocks carried in water

• The dissolving of minerals from rocks by water

What is 'solution' in the context of river erosion?

• When rocks and pebbles hit each other and break down

• When rocks are broken down by repeated air bubble impacts

• When water wears away the land by carrying rocks

• When water dissolves minerals from rocks

What describes the process of 'attrition' in river erosion?

• The wearing down of rocks as they collide and break into smaller pieces

• The dissolving of minerals from rocks

• The shattering of rocks by air bubbles

• The wearing away of land by rocks

What happens when a river erodes soft rock faster than hard rock?

• The soft rock breaks into smaller, rounded pieces

• The river stops flowing over the hard rock

• The soft rock is undercut, leaving hard rock as an overhang

• The hard rock is dissolved by water