All questions
Question 1
Diagram 3 shows a steep coastal cliff. In the before panel, the cliff edge is farther seaward. In the after panel, the cliff edge has moved inland, and broken rock pieces are shown at the base. Wave arrows repeatedly hit the base of the cliff, and an arrow labeled “rock falls” points downward.
Which process is most directly responsible for the cliff retreat shown?
Note: Multiple processes can act together (for example, weathering can weaken rock, and erosion can remove it).
- Deposition of sand building the cliff higher and farther seaward
- Erosion by waves removing rock at the base and causing collapse (correct answer)
- Glacial movement scraping the cliff face as ice flows along the coast
- Human construction alone moving the entire cliff inland
Explanation: The core skill is identifying processes that shape Earth’s surface, such as how waves alter coastlines like cliffs. Key processes include erosion, where waves wear away rock at the base, leading to instability and collapse, while weathering weakens the material beforehand. Evidence in landforms, such as retreating cliff edges with fallen debris at the base, indicates wave erosion as the primary force removing material and causing the land to recede inland. To check, match features like undercut bases and rock falls to the process of erosion by persistent wave action. A common misconception is mixing up weathering, which chemically or physically breaks down rock in situ, with erosion, which involves the removal and transport of that material. Earth’s surface changes due to multiple interacting processes, where weathering prepares rock for erosion, and waves drive the change over years. These interactions can dramatically reshape coastal areas, turning stable cliffs into eroding shorelines through ongoing natural forces.
Question 2
A hillside is shown in two panels. Panel 1 shows solid rock with small cracks. Panel 2 shows the same hillside later with larger cracks, loose rock pieces, and a small pile of sediment at the bottom of the slope. Labels indicate: (a) “rock breaks into pieces” near the cracks and (b) “pieces moved downhill” toward the pile. Multiple processes can act on the same surface.
Which pair of processes best matches labels (a) and (b)?
- (a) Deposition, (b) Weathering
- (a) Weathering, (b) Erosion (correct answer)
- (a) Erosion, (b) Deposition
- (a) Volcanic activity, (b) Glacial movement
Explanation: The core skill is identifying processes that shape Earth’s surface. Key processes include weathering expanding cracks and erosion moving the resulting loose material downhill. Evidence in landforms, such as enlarged fractures and basal sediment piles, indicates sequential weathering and erosion. To check, match breaking in place to weathering and transport to erosion. A common misconception is that weathering involves movement, but weathering is stationary breakdown, distinct from erosion's transport. Earth’s surface changes due to multiple interacting processes over time, gradually modifying slopes. These processes work together to break down and redistribute Earth's materials.
Question 3
A cliff face is shown in two photos taken years apart. In the later photo, the cliff has retreated inland, and a pile of broken rock fragments has collected at the base. Labels show (1) cracks widening on the cliff face and (2) loose rock pieces accumulating below. Multiple processes can act on the same surface.
Which statement is best supported by the evidence in the photos?
- Weathering broke the rock at the cliff face, and gravity moved the pieces downslope as erosion (correct answer)
- Deposition built the cliff higher by stacking new layers of rock at the top
- Volcanic activity formed the pile at the base by erupting ash from the cliff
- The cliff stayed the same, and the changes are only due to a different camera angle
Explanation: The core skill is identifying processes that shape Earth’s surface. Key processes include weathering, which weakens and breaks rocks, and erosion, which moves the broken pieces downslope often aided by gravity. Evidence in landforms, such as retreated cliffs and piles of debris at the base, indicates the action of weathering followed by erosional transport. To check, match features like widened cracks and accumulated rock fragments to weathering and gravity-driven erosion. A common misconception is equating weathering with erosion, but weathering breaks rocks without moving them, while erosion involves transport. Earth’s surface changes due to multiple interacting processes over time, such as weathering preparing materials for erosion to reshape slopes. Over long periods, these processes can significantly alter coastlines and hillsides.
Question 4
A before/after diagram shows a sea cliff.
- BEFORE: a tall, steep cliff with cracks near the top.
- AFTER (after a storm): a pile of broken rock at the base and the cliff edge slightly farther inland.
Multiple processes can act on the same surface.
Which statement is best supported by the evidence in the diagram?
- Weathering broke rock in the cliff, and erosion moved some material away from the cliff base. (correct answer)
- Deposition caused the cliff to retreat by adding new rock to the top.
- Volcanic activity formed the pile of broken rock at the base during the storm.
- The cliff could only change if humans cut into it with machines.
Explanation: The core skill in understanding Earth's dynamic landscape involves identifying processes that shape its surface, such as weathering, erosion, deposition, and wave action. Key processes include weathering, which breaks down rocks through physical or chemical means, and erosion, which transports the loosened material away, often leading to cliff retreat. Evidence in landforms, such as piles of broken rock at cliff bases after storms, indicates weathering initiating breakdown followed by erosive removal. To check understanding, match features like cracked cliffs to weathering and retreated edges to erosion. A common misconception is confusing weathering, which breaks down rocks in place, with erosion, which transports the broken material away. Earth's surface changes result from multiple interacting processes, including storms and gravity. Over time, these processes continuously reshape coastlines, creating evolving features like sea cliffs.
Question 5
A before/after diagram shows a large boulder on a hillside.
- BEFORE: the boulder is one solid piece with visible cracks.
- AFTER (after many freeze-thaw cycles): the boulder is broken into smaller angular pieces that remain in the same place.
Multiple processes can act on the same surface.
Which surface-shaping process is most directly shown in the after image?
- Weathering, because the rock broke into smaller pieces without being carried away. (correct answer)
- Erosion, because the rock pieces were transported downhill by moving water.
- Deposition, because new sediment was added to build a landform.
- Volcanic activity, because lava cooled into angular fragments.
Explanation: The core skill in understanding Earth's dynamic landscape involves identifying processes that shape its surface, such as weathering, erosion, deposition, and freeze-thaw cycles. Key processes include physical weathering, which fractures rocks through expansion and contraction, without moving the pieces. Evidence in landforms, such as angular rock fragments remaining in place after cracking, indicates in-situ breakdown. To check understanding, match features like unchanged positions of broken pieces to weathering alone. A common misconception is confusing weathering, which breaks down rocks in place, with erosion, which transports the broken material away. Earth's surface changes result from multiple interacting processes, including temperature changes and water. Over time, these processes continuously reshape hillsides, creating fragmented rock accumulations.
Question 6
Diagram 7 shows two landforms side by side.
- Landform X: a narrow V-shaped valley with a stream at the bottom; arrows show water flowing and carrying small rock pieces.
- Landform Y: a wide U-shaped valley with scratch marks on the sides; arrows show ice moving downhill.
Which comparison is supported by the evidence in the diagram?
Remember: More than one process can act on the same area, but the diagram highlights the dominant process shaping each valley.
- Both valleys were mainly formed by wind deposition because both have slopes
- Landform X was mainly shaped by river erosion, and Landform Y was mainly shaped by glacial erosion (correct answer)
- Landform X was mainly shaped by volcanic lava flows, and Landform Y was mainly shaped by river deposition
- Both valleys formed instantly during a single storm event, so no long‑term process is needed
Explanation: The core skill is identifying processes that shape Earth’s surface, comparing valley types formed by different agents. Key processes include river erosion, which carves narrow V-shaped valleys, and glacial erosion, which broadens them into U-shapes through scraping. Evidence in landforms, such as V-valleys with streams versus U-valleys with ice marks, indicates the dominant process like flowing water or moving ice. To check, match features like valley shape and side markings to specific erosional agents such as rivers or glaciers. A common misconception is mistaking weathering, a stationary breakdown, for erosion, which involves movement by water or ice. Earth’s surface changes due to multiple interacting processes, where one may dominate but others contribute over time. These processes gradually sculpt diverse landscapes, revealing the history of environmental conditions like past glaciations or river flows.
Question 7
Diagram 2 shows a sand dune field. The arrows labeled “prevailing wind” point from left to right. Sand grains are shown moving up the gentle slope on the left side of each dune and falling down the steeper slope on the right side, where a label says “sand piles up.”
Which claim is supported by the evidence in the diagram?
Remember: Multiple processes can affect the same area (for example, weathering can create sand, wind can move it, and deposition can build dunes).
- Wind erosion moves sand, and wind deposition builds the dunes on the downwind side (correct answer)
- Glacial movement pushes sand into piles, forming dunes as the ice melts
- Volcanic eruptions create dunes by spraying ash that instantly hardens into ridges
- Weathering alone forms dunes by breaking bedrock into sand without moving it
Explanation: The core skill is identifying processes that shape Earth’s surface, including how wind forms features like sand dunes. Key processes involve erosion, where wind picks up and transports loose particles, and deposition, where those particles are dropped to build up structures. Evidence in landforms, such as asymmetrical dunes with gentle upwind slopes and steeper downwind sides, indicates wind erosion on one side and deposition on the other as sand is carried and then falls. To check, match features like piled-up sand on the leeward side to the combined actions of wind erosion and deposition. A common misconception is confusing weathering, which breaks down rocks without movement, with erosion, which actively transports the broken materials. Earth’s surface changes due to multiple interacting processes, with wind playing a key role in arid regions over long periods. Over time, these processes can transform flat areas into vast dune fields through repeated cycles of movement and accumulation.
Question 8
Diagram 10 shows a student’s claim about a landform. The diagram includes a river entering a lake and a small triangular deposit labeled “mud and sand build up.” Arrows show the river carrying sediment toward the lake, and the water is shown slowing at the lake edge.
Student claim: “This triangular landform was created by erosion because erosion always builds new land where a river meets a lake.”
Which evaluation of the student’s claim is most accurate based on the diagram?
Note: Multiple processes can act in one place, but they do different jobs: weathering breaks down, erosion moves, and deposition builds up.
- The claim is correct because erosion is the process that builds up sediment into new land
- The claim is incorrect because deposition builds up the triangular landform when sediment is dropped (correct answer)
- The claim is correct because the landform must have formed instantly during one flood
- The claim is incorrect because only volcanic activity can create new landforms
Explanation: The core skill is identifying processes that shape Earth’s surface, distinguishing roles in building features like river deltas. Key processes are erosion, which transports sediment, and deposition, which accumulates it into triangular landforms where water slows. Evidence in landforms, such as mud and sand buildups at river-lake junctions with slowing flows, indicates deposition as the builder, not erosion. To check, match features like sediment drops to deposition, ensuring it's not confused with erosional removal. A common misconception is thinking weathering moves sediment, but weathering breaks it down in place, while erosion carries it. Earth’s surface changes due to multiple interacting processes, where erosion supplies material for deposition to form new land. Over time, these processes create fertile plains, highlighting the sequential nature of landscape formation.
Question 9
Two landforms are shown side by side. Landform X is a narrow V-shaped valley with a stream at the bottom and arrows showing running water moving downhill. Landform Y is a wide U-shaped valley with arrows showing ice moving downhill. Multiple processes can act on the same surface.
Which comparison is supported by the evidence in the diagram?
- Both valleys were mainly shaped by deposition because material builds up in valleys
- Landform X was mainly shaped by river erosion, while Landform Y was mainly shaped by glacial movement (correct answer)
- Landform X was mainly shaped by volcanic activity, while Landform Y was mainly shaped by wind
- Both valleys formed instantly during a single storm event
Explanation: The core skill is identifying processes that shape Earth’s surface. Key processes include river erosion carving narrow valleys and glacial erosion forming wider, U-shaped ones. Evidence in landforms, such as valley shape and bottom features, indicates whether water or ice was the primary agent. To check, match narrow V-shapes to rivers and broad U-shapes to glaciers. A common misconception is that erosion and weathering are the same, but weathering disintegrates rocks, while erosion carves by moving material. Earth’s surface changes due to multiple interacting processes over time, with different agents creating distinct valley types. Over geologic time, these processes interact to evolve landscapes.
Question 10
A coastline is shown in a before/after diagram. In the before panel, a beach is wide. In the after panel (after several storms), the beach is narrower and a sandbar has formed just offshore. Arrows show waves pushing sand along the shore and then dropping some sand where the water becomes calmer behind the sandbar. Multiple processes can act on the same surface.
What change is most likely if deposition offshore continues to dominate over erosion on the beach?
- The offshore sandbar will grow larger as more sand is deposited there (correct answer)
- The sandbar will turn into hardened volcanic rock as soon as it forms
- The beach will become wider because weathering creates new sand without moving it
- No landforms will change because coastlines stay the same unless people build walls
Explanation: The core skill is identifying processes that shape Earth’s surface. Key processes include wave erosion moving sand along shores and deposition forming bars offshore. Evidence in landforms, such as narrowing beaches and growing sandbars, indicates shifts in erosion and deposition balance. To check, match sediment movement and accumulation to wave actions. A common misconception is that weathering directly widens beaches, but weathering creates particles elsewhere, while erosion and deposition redistribute them. Earth’s surface changes due to multiple interacting processes over time, especially in stormy conditions. Coastlines are continually reshaped by these forces.
Question 11
Two diagrams show different valleys.
- Valley 1: narrow, V-shaped cross-section with a stream at the bottom.
- Valley 2: wide, U-shaped cross-section with a flat bottom; arrows show ice moving through it.
Multiple processes can act on the same surface.
Which comparison is best supported by the diagrams?
- Valley 1 was mainly shaped by river erosion, and Valley 2 was mainly shaped by glacial movement. (correct answer)
- Valley 1 was mainly shaped by deposition, and Valley 2 was mainly shaped by wind erosion.
- Both valleys were mainly shaped by weathering because both have rock at the sides.
- Both valleys were mainly shaped instantly during a single flood event.
Explanation: The core skill in understanding Earth's dynamic landscape involves identifying processes that shape its surface, such as weathering, erosion, deposition, and glacial movement. Key processes include river erosion forming V-shaped valleys and glacial erosion creating U-shaped ones. Evidence in landforms, such as narrow V-profiles with streams versus wide U-profiles with ice indicators, distinguishes the shaping agents. To check understanding, match features like valley cross-sections to their erosive processes. A common misconception is confusing weathering, which breaks down rocks in place, with erosion, which transports the broken material away. Earth's surface changes result from multiple interacting processes, including water and ice. Over time, these processes continuously reshape terrains, producing varied valley types.