Answer: C. Grow the tree in a pot and measure the mass of the soil before and after the tree grows to a certain height
Explanation: When testing an hypothesis, which is a prediction of the outcome of an experiment, it is vital to keep all other factors, that can affect the outcome of the experiment, constant; so that any outcome can be attributed (or disregarded) to the variable being tested.
In this case, the variable being tested is the soil, and so all other factors such as water, air, sunlight, etc. should be kept constant.
Yes, the Germans considered the Jewish people vermin and kept them isolated to ghettos before they were sent to concentration camps and gassed with pesticides.
Answer: WHo is Captain John SMith
Explanation: John Smith was an English soldier, explorer, colonial governor, Admiral of New England, and author. He played an important role in the establishment of the colony at Jamestown, Virginia, the first permanent English settlement in America in the early 17th century.
"In 768 Charlemagne became king of the Franks. He fought to increase his power and territory and greatly expanded his empire. As a result, much of the original Roman empire fell under his rule. He was responsible for the creation of schools and the spread of Christianity throughout Europe.