Review Erosion-4

The large cracks in this rock are called expansion cracks. As the overlying rock erodes away, the rock expands, causing the cracks. The cracks are an example of:

  1. Erosion

    No. Erosion means that the pieces of rocks are being carried away. The overlying rocks have been eroded, but the cracks are not carrying the pieces to a new location.
  2. Weathering

    Yes! As the rocks expand unevenly, tension builds up. When there is enough stress, the rocks break. That breaking of large rocks into smaller pieces is called weathering.

  3. Both erosion and weathering

    No. The rocks are being broken (weathering), but the pieces are staying in place, so there is not erosion.
  4. Neither erosion nor weathering

    No. The cracks show that the rocks are breaking, which is weathering..



Click to see which state standards this question tests, and which of my videos, experiments, and other resources support that topic.

Florida


SC.4.E.6.1 Identify the three categories of rocks: igneous, (formed from molten rock); sedimentary (pieces of other rocks and fossilized organisms); and metamorphic (formed from heat and pressure).
Evaporites video, learnalong
Igneous Rocks and Bubbles video, learnalong
Sedimentary Rocks video, learnalong
What is a Rock? video, learnalong
Bioclastics: Rocks With No Minerals video
Homemade Fossil Dig text page
Foliated and Unfoliated Rocks text page, learnalong
Identifying Igneous Rocks text page, learnalong
Intrusive and Extrusive Igneous Rocks text page, learnalong
Light and Dark Minerals text page, learnalong
Review Rocks-10 practice
Review Rocks-10 practice
Review Rocks-1 practice
Review Rocks-2 practice
Review Rocks-3 practice
Review Rocks-4 practice
Review Rocks-5 practice
Review Rocks-6 practice
Review Rocks-8 practice
Review Rocks-9 practice
Review Rocks-7 practice
Review Rocks-10 practice

SC.7.E.6.2 Identify the patterns within the rock cycle and relate them to surface events (weathering and erosion) and sub-surface events (plate tectonics and mountain building).
Evaporites video, learnalong
What is a Rock? video, learnalong
The Rock Cycle video, learnalong
Change: Fast and Slow video
Erosion video
Continuous Change video
Bioclastics: Rocks With No Minerals video
Weathering and Erosion video, learnalong
Review Rocks-1 practice
Review Erosion-1 practice
Review Erosion-2 practice
Review Erosion-3 practice
Review Erosion-4 practice
Review Erosion-5 practice
Review Rocks-4 practice
Review Erosion-6 practice
Review Rocks-5 practice
Review Rocks-6 practice
Review Rocks-8 practice
Review Rocks-9 practice
Review Rocks-7 practice
Review Rocks-10 practice
Review Rocks-10 practice

Utah


UT.4.III.2.b Distinguish between weathering (i.e., wearing down and breaking of rock surfaces) and erosion (i.e., the movement of materials).

UT.5.II.1.a Identify the objects, processes, or forces that weather and erode Earth’s surface (e.g., ice, plants, animals, abrasion, gravity, water, wind)

UT.8.III.2.b Describe the role of energy in the processes that change rock materials over time.
Igneous Rocks and Bubbles video, learnalong
Sedimentary Rocks video, learnalong
Change: Fast and Slow video
Erosion video
Continuous Change video
Weathering and Erosion video, learnalong

NGSS


4-ESS2-1 Make observations and/or measurements to provide evidence of the effects of weathering or the rate of erosion by water, ice, wind, or vegetation.