Which of the following is considered chemical weathering? A. rock splits because tree roots wedged into a crack.

B. Water freezes in a crack in the rock and expands, splitting the rock.

C. A limestone rock dissolves due to acid rain.

D. A rock broke into chunks after being tossed around in a river.

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.

The layers of earth are based on what two sets of characteristics?

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