How is chemical weathering different from physical weathering?
a.
physical weathering involves the movement of substances while chemical weathering does not.
b.
chemical weathering occurs through human action while physical weathering occurs naturally.
c.
physical weathering is mechanical breakdown, while chemical weathering involves the chemical breakdown of substances.
d.
chemical weathering causes less drastic changes than physical weathering.

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit