D. one year
7. which of the following is not a characteristic of topsoil?
a. it develops very slowly and is the most utilized part of soil
b. it makes up the top two to eight inches of soil
c. it is the most fertile part of the land for growing plants
d. it develops very quickly and is the most utilized part of soil

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

What type of graph presents information about how often certain or traits occur?

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water