The document discusses volume and capacity measurements. It defines volume as the measure of an object's ability to hold a substance, while capacity is the space taken up by the object itself. Examples are provided to distinguish between capacity, which is used to measure liquids in mL or L, and volume, which uses cubic units. A word problem asks how many gallons of water Ana uses in a week if she takes 3 showers a day using 50 gallons each. Another word problem asks how many liters of water would be damaged if 83 drops of oil are spilled, where each drop damages 25 L of water.