Use the cross section of the hillside. What kind of mass movement does it show?

At the base of a steep cliff, a fresh pile of broken, angular rock fragments has collected. What process produced this pile?

A tongue of thick, water-saturated mud and debris has spread out across a valley floor below a steep, bare hillside. What is this landform evidence of?

A mountainside shows a bare scar of exposed bedrock above a jumbled mass of broken rock that traveled downslope in one coherent sheet. Which failure is this?

A coastal bluff shows a crescent-shaped scarp near the top and a bulging apron of slipped material near the waterline below it. What best describes this failure?

After a wildfire stripped the vegetation from a steep hillside, a heavy rainstorm sent a channel of mud and charred debris surging down a canyon and burying a road. What process buried the road?

In March 2014, weeks of rain far above average left a hillside above the North Fork Stillaguamish River in Oso, Washington nearly saturated when it collapsed. How did the water most directly cause the failure?

A magnitude 6.5 earthquake shook a steep slope of loose, dry soil, and within seconds a large section broke away and slid downhill. How did the earthquake trigger the failure?

A river has flowed against the foot of a steep bank for years, and the upper bank recently collapsed into the channel. What most directly led to the collapse?

A hillside that was logged of its trees two years ago failed during an ordinary rainstorm, though it had never failed before the logging. What role did the missing trees play?

A construction crew cut a steep, vertical face into a hillside to widen a road, and the exposed slope failed within a month. What made this slope more likely to fail than before the cut?

On a rocky mountainside, water repeatedly seeps into cracks, freezes and expands, then thaws, over many winters. What does this repeated freezing and thawing do to the slope?

A row of fence posts on a gentle grassy slope tilts downhill at increasing angles toward the bottom, with no scarp or slide scar anywhere on the slope. What process is moving the soil?

Several tree trunks on a hillside curve sharply near their base before growing straight upward again, and a nearby utility pole leans slightly downhill. Which process bent the trunks this way?

A retaining wall along a hillside road has bowed outward over several years, and the pavement above it has slowly cracked and sagged, though no sudden slide scar has ever appeared. What is moving the slope?

A road cut through a hillside exposes soil layers that are horizontal deep down but curve to point downhill as they approach the surface. What does this curvature in the soil layers indicate?

A road cut through wet shale keeps failing after heavy storms because rainwater builds up inside the rock and the slope loses strength. Which mitigation addresses this cause most directly?

A construction crew cut a hillside of loose fill to a steep, near-vertical angle to save space, and the slope now fails repeatedly. Which mitigation best addresses this cause?

A fractured rock face above a highway repeatedly sheds loose blocks that strike the road below. Which mitigation reduces this hazard most directly?

A hillside that was clear-cut of its forest now slides during ordinary rainstorms that never caused problems before the logging. Which mitigation addresses the actual cause of this new instability?