Review Erosion-5

This is a lichen, which is actually a fungus and an algae living together. As it grows, it produces chemicals which dissolve some of the rock it grows on. This is an example of:

  1. Erosion

    No. Erosion means that the pieces of rocks are being carried away. The lichen is dissolving the rock, but not carrying it away.
  2. Weathering

    Yes! Lichens cause quite a bit of weathering in rocky areas.

  3. Both erosion and weathering

    No. The rock is not being moved, so it is not erosion.
  4. Neither erosion nor weathering

    No. As the lichen dissolves the rock, that is an example of 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
Light and Dark Minerals text page, learnalong
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
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
Review Rocks-10 practice
Review Rocks-10 practice
Review Rocks-1 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 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
Review Rocks-1 practice
Review Erosion-1 practice
Review Erosion-2 practice
Review Erosion-3 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.