Waterfalls Formation and Characteristics Quiz

What is the primary reason that hard rocks like lava are more resistant to erosion compared to softer rocks?

• They are more porous.

• They have a higher hardness on Moh's scale.

• They are heavier.

• They contain more minerals.

What happens to the velocity of a stream as the riverbed becomes steeper?

• It decreases.

• It increases.

• It fluctuates randomly.

• It remains constant.

What is the term used for the pool formed at the base of a waterfall?

• Riverbed

• Water basin

• Plunge pool

• Erosion pool

What natural process causes the overhanging rock at a waterfall to eventually collapse?

• Undercutting

• Volcanic activity

• Earthquakes

• Freezing and thawing

Which of the following is NOT a waterfall formed at the end of a lava flow from Mount Ruapehu?

• Tawhai Falls

• Mangawhero Falls

• Niagara Falls

• Taranaki Falls