Are the items in the list renewable or nonrenewable resources?

choose n for nonrenewable resources.
choose r for renewable resources.

1. petroleum
2. aluminum
3. dirt
4. salmon
5. coal

What is the amount of organic matter in all living organisms in a habitat called?

Identify the type of weathering seen in each picture ? chemical weathering mechanical weathering

Liquefaction is a. a quicksand-like condition arising in some wet soils during earthquakes. b. flooding caused by tsunamis. c. flooding of coastal areas due to tectonic subsidence. d. flooding caused by dam failure resulting from an earthquake.