Catastrophic Events, Weathering and Erosion, and Watersheds Review

Which of the following statements is correct about watershed?

• It is a body of water that flows into creeks, rivers, bays, or seas/oceans.

• It’s a large container of water that collects rainfall and snowmelt and channel it to creeks, rivers, and eventually to bays/oceans.

• It's an area of land that contains a common set of creeks and rivers that all drain into a single larger body of water, such as rivers, lakes/bays, or an ocean.

• It is a body of water like creeks, rivers, bays that gives home to aquatic animals.

What is an example of chemical weathering

• Water freezing on cracked mountain side and breaking it open

• River current carrying sediment and placing them at the mouth of the river.

• Acid rain dissolving parts of limestone(Pitting)

• Rockslides

These rocks were broken apart from the continuous freeze/thaw of water in the cracks of the rocks. This is an example of:

• ice wedging
• acid rain
• permeability
• abrasion

Deposition changes the Earth’s surface because eroded materials _____.

• stop the river's flow
• make rich farmlands
• are dropped in new places
• move very slowly

How are canyons formed?

• Wind blows sand into high piles, which form the canyon walls.
• Rivers erode soil and rock over time, leaving behind canyon walls.
• Gravity causes rocks to fall from mountain sides onto valley floors.
• Ice freezes and thaws in cracks of rocks, and the cracks become canyons.

What is mechanical weathering?

• Process through which rocks are physically broken into smaller pieces.
• Rocks are broken down through chemical changes.
• Rocks are worn away from acid in plant roots.
• Rocks broken down by machinery.

During chemical weathering, what can happen to the type of rock that has undergone chemical weathering?

• a new rock is produced that is larger than the original rock
• a new rock is produced that is the same as the original rock
• a new rock is produced that is different from the original rock 
• no new rock is created - it is just smaller in size

This photo is an example of

• River mouth 
• Delta 
• Meander 

Which of these landforms was made by deposition?

• River mouth 
• Delta 
• Meander 
• Canyon 

This is a picture of:

• sea arch
• delta
• floodplain
• alluvial fan