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?

Back

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

Front

Look at the image of sand dunes. Which correctly describes the process of sand dune formation? Choose all correct statements: A. A river carries sand from one location and deposits it on a growing hill downstream. B. Wind carries sand across a beach and deposits the sand on a growing hill away from the water. C. Ice moving across the land picks up loose sand and deposits it in a ridge or a mound. D. Earthquakes disrupt loose sand and shake it into place along fault lines.

Back

Wind carries sand across a beach and deposits the sand on a growing hill away from the water.

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.