What do cave passages at several different depths most likely indicate?
a. different rates of erosion
b. multiple aquifers below ground
c. changes in the water table over time
d. several deposits of limestone on top of one another

Amineral forms from water at the edge of a lake. which statements best describe this mineral? check all that apply. the mineral formed from lava. the mineral formed through evaporation. the mineral formed when hot water cooled. the mineral crystallized from magma. the mineral crystallized from dissolved elements and compounds.

Rocks that contain crystals that are roughly equal in size and can be identified with the unaided eye are said to exhibit a texture.

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.