Aresearcher is studying the science of attractiveness and asks volunteer test subjects to describe what trait they find most attractive when show images of different people. what type of variable is the dependent variable in this experiment? a. ordered b. concrete c. categoric d. continuous

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error