From the surface downward, how does soil vary with depth?

a. the soil stays the same from the surface to the parent material

b. the soil becomes wetter, less rocky, and more fertile

c. the soil becomes dryer, looser, and less like the parent material

d. the soil becomes rockier, less fertile, and more like the parent material

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.