Which statement best describes what the mass of an object represents? mass is the length of an object. mass is the amount of matter in an object. mass is the amount of space taken up by an object. mass is the ability of an object to float.

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

What are two reasons for why a species might disappear from the fossil record?

Antoine manages a number of apartment buildings that use natural gas for heating, cooking, and laundry. the scatter plot shows the correlation between the outside air temperature and antoine's natural gas bill. which type of correlation does the plot illustrate?