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

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

Which branches of natural science include the study of an organism that lived 10 million years ago