Dynamic Earth Unit 1 Test Study Guide
What are the 2 types of weathering?
Define erosion
CHEMICAL + PHYSICAL
MOVEMENT OF SOIL FROM 1 PLACE TO ANOTHER
What type of weathering is wind?
PHYSICAL
How does an alluvial fan form? STREAM SLOWS DOWN (FLAT AREA OF LAND) + DEPOSITS
SEDIMENT OVER TIME
How might erosion by groundwater create a landform? ACIDIC WATER DISSOLVES ROCKS
UNDERGROUND TO FORM A CAVERN
Where is a delta formed?
WHERE THE RIVER ENTERS THE OCEAN
How does the gopher tortoise cause physical weathering? IT MOVES ROCKS ABOVE GROUND
WHERE IT IS EXPOSED TO WIND AND RAIN
What usually causes a valley to first form?
Define groundwater
Define shoreline
RUNNING WATER
WATER BELOW THE EARTH’S SURFACE
WHERE LAND AND A BODY OF WATER MEET
Why is Loess valuable?
FORMS GOOD SOIL FOR FARMING
How is Loess formed?
LAYERS OF WIND BLOWN DUST BUILD UP
What landform is mainly created by erosion by groundwater? UNDERGROUND CAVERN
What causes cracks in rocks to grow larger? PLANT ROOTS + ICE Wedging
What mainly causes sand dunes? WIND
What would happen if the slope of a stream was increased? WATER SPEED + EROSION
INCREASE
What force mainly causes landslides, rock falls, and mudslides? GRAVITY
What weather condition mainly causes landslides, rock falls, and mudslides? RAIN
How do decaying leaves affect rocks in the soil? RELEASE ACID INTO SOIL INCREASING
CHEMICAL WEATHERING
What is needed for kettle lakes to form? MELTING ICE BLOCKS + SEDIMENT
What landform most likely formed beneath a sinkhole? CAVE
What removes the most sand from a barrier island during a storm? LARGE WAVES
What causes granite to break down over time?
RAIN + WIND
What causes the deposition of sand at a delta? RIVER WATER SLOWING DOWN AS IT ENTERS
THE OCEAN
Define creep
MASS MOVEMENT CAUSED BY GRAVITY
What often happens to rock undergoing chemical weathering? IT CRUMBLES EASILY
What happens to a rock when it is weathered? IT IS BROKEN INTO SMALLER PIECES
What type of rock is most affected by acids? MARBLE
Define abrasion
A SHAPE CHANGE DUE TO EXPOSURE TO WIND / A CHANGE IN SIZE