Unit 3 Lesson 2&3 Quiz Landforms

The water in a fast-moving river causes rocks to bump and scrape against one another. What will happen to these rocks over time?

• They will get larger.
• They will get smaller.
• They will get sharper.
• They will get heavier.

Mr. Noel asks his science class to design an activity that will make rocks smooth like the ones they find near the river. Which activity shows how a river makes rocks smooth?

• Place the rocks in direct sunlight. 
• Bury the rocks in soil under water. 
• Put the rocks under a heavy weight.
• Shake the rocks in a container of water. 

If you look closely at beach sand, you will see that it is made up of tiny rocks and other materials. How is this sand on an ocean beach formed?

• River deltas create the sand. 
• Waves weather rocks and shells.
• Wind blows sand from nearby deserts.
• Landslides bring sand down from cliffs. 

What will eventually happen to rocks as they break apart in the moving water of a river?

• They will form the sand that you see in deserts. 
• They will eventually harden into larger pebbles and rocks. 
• They will cause sea arches to form in cliffs along the shore. 
• They will form silt and sand and become deposited as sediments.

Brayden places water, pieces of chalk, sand, and some pebbles and rocks into a jar. He puts the cap on the jar and shakes the jar for one minute each for 20 trials. When he is finished, he observes that the chalk has broken into tiny pieces. Which of the processes below has Brayden demonstrated with this investigation?

• erosion 
• deposition 
• weathering 
• glacial movement

Trace the path of the river in the picture. Which of the following processes cause the formation you see at the end of the river?

• Gravity caused rocks to fall from the mountain.
• Melting ice caused large puddles to form a river delta. 
• Wind caused sand to build up many sand dunes. 
• Sediments of silt and sand were deposited to form a delta.

Wind, water, and ice are involved in both weathering and erosion. However, weathering and erosion are two different processes. Which sentence states a difference between weathering and erosion?

• Erosion moves rocks to a new location.
• Erosion breaks down rocks but doesn’t move them. 
• Weathering moves rocks from place to place. 
• Weathering moves rocks without breaking them down.

Which of these is an example of how a glacier causes erosion to happen?

• As glacial ice melts, lakes are formed. 
• Glaciers drop off sediments forming moraines. 
• Glaciers pick up rock and soil and move them along.
• Glaciers form when snow and ice pile up over years. 

River deltas are triangular deposits of sediment that are created by the flow of water at the mouth of a river.  Which kinds of materials make up the sediment that forms a river delta such as the one in the picture?

• boulders and pebbles
• trees and branches
• ice and snow
  
• silt and sand
  
  

Weathering is defined as the process by which rocks are broken down into smaller pieces. Which of the following choices is an example of weathering?

• glaciers creating moraines 
• wind blowing dust across flat land
• plant roots breaking apart rock
• ocean waves depositing sand on beaches