Plowing removed the grass from the great plains and exposed the soil. what effect did this have when a drought struck the great plains during the 1930's?
a. it had no effect
b. it reduced the soil's fertility
c. it to cause the dust bowl
d. it prevented sod from developing

How can one distinguish breccia from conglomerate? a. breccia contains angular clasts and conglomerate contains rounded clasts. b. breccia contains rounded clasts and conglomerate contains angular clasts. c. different minerals cement breccia than cement conglomerate. d. breccia contains sand and conglomerate contains silt.

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c