The Gibraltar Barbary macaques are considered by many to be the top tourist attraction in Gibraltar. The most popular troop is that of Queen's Gate at the Apes' Den, where people can get especially close to the monkeys.
Dry food items, especially foods that can be poured into specific portions, are often measured in grams. A gram is a measurement of weight or mass within the metric system and can be used to measure anything from cars to water.
Mass is a measurement of how much matter there is in a substance. This is often found using the units grams or kilograms. Volume is a measurement of how much space a substance occupies. Cubic centimeters and cubic meters are typical units of volume. Therefore, density is commonly identified using the units grams per cubic centimeter or kilograms per cubic meter.