1 Creep and mudflows are two types of __________.A) gravity B) chemical weathering C) mass movements D) mechanical weathering 2 Gravity, ice, wind, and water are agents of __________.A) deflation B) abrasion C) runoff D) erosion 3 Rainfall can cause all of the following types of mass movement EXCEPT __________.A) slump B) rockslides C) mudflows D) creep 4 A __________ occurs along curved surfaces.A) creep B) slump C) mudflow D) rock slide 5 Rock flour is a result of __________ erosion.A) glacial B) wind C) water D) soil 6 U-shaped valleys are formed by __________.A) rivers B) lakes C) glaciers D) rock slides 7 __________ is a mixture ranging from small particles to large boulders.A) Outwash B) Deposition C) Till D) Sediment 8 __________ is the result of sand and gravel deposits left by rivers.A) Till B) Sediment C) Outwash D) Deposition 9 Deflation is an erosional process of __________.A) ice B) water C) landslides D) wind 10 Silt that is carried by the wind and then deposited is called __________.A) loess B) talcum C) till D) flour 11 A form of erosion that results in pitted or smoothly polished rocks is __________.A) deflation B) abrasion C) till D) runoff 12 Water moving over Earth's surface results in __________.A) abrasion B) deflation C) runoff D) loess 13 __________ erosion occurs when water flows down a slope in a thin layer.A) Abrasion B) Outwash C) Till D) Sheet 14 Which list correctly places channels in order from smallest to largest?A) rill, gully, stream B) rill, stream, gully C) gully, rill, stream D) stream, gully, rill 15 The most important agent(s) of erosion is/are __________.A) ice B) wind C) streams D) gravity 16 Canyons are formed by the erosional processes of __________.A) streams B) ice C) wind D) gravity 17 __________ are formed when sediment accumulates in large amounts at the mouth of a river.A) Rills B) Outwashes C) Deltas D) Tills 18 Sediment accumulates to create all of the following EXCEPT __________.A) deltas B) bars C) sand dunes D) mountain bowls