Learn about volumes and capacities in this elementary mathematics video. Explore the historical importance of measuring grain and valuable liquids, and discover the two main systems used today - the metric system based on liters and the US/Imperial system using gallons, quarts, pints, and cups. Gain hands-on understanding of numerical systems and arithmetic through practical activities with containers and water. Understand the relationship between weights and volumes, and see how scientific work utilizes specialized equipment like flasks and beakers. Practice solving various arithmetical problems related to volume measurements to reinforce learning.