3.5 Science Savvas: Slow Changes to Earth

Front

Weathering and erosion are constantly changing Earth’s surface. Which statement correctly describes the processes of weathering and erosion? A. Weathering is the movement of rocks by wind, water, and ice. Erosion is the breakdown of those rocks into sediment. B. Weathering is the process of depositing sediments. Erosion is the breakdown of rocks into sediment. C. Weathering is the breakdown of rocks by physical means. Erosion is the breakdown of rocks by chemical means. D. Weathering is the process of breaking down rocks into sediment. Erosion is the movement of sediments by wind, water, and ice.

Back

Weathering is the process of breaking down rocks into sediment. Erosion is the movement of sediments by wind, water, and ice.

Front

Changes in Earth’s surface over time result in the formation of canyons and deltas. How do deltas and canyons form? 1. Water or ice carries sediment away from its original location to the mouth of a river. 2. Wind, water, or ice carves a deep valley in rock. 3. Over time, the flow of water causes the river to sink lower between rock formations.

Back

Delta: 1; Canyons: 2 and 3

Front

How do glaciers change the land and what evidence shows this?

Back

Glaciers can change the land by eroding rock and soil, creating U-shaped valleys.