Oxygen did not build up in the atmosphere as soon as life began to produce it, because the oxygen was pulled back out of the atmosphere by reactions with surface rocks. True False

What does a movement along the demand curve show

What first caused people to consider that the continents were once one large landmass?

Sarah is making a scale drawing of a painting that is 48inches wide by 120 inches high her paper is 12 inches wide and 24 inches tall she decides to use a scale 1 inches equals 4 inches is this a reasonable scale