Show a measuring cup and explain that a cup is a unit of measurement. Ask them to estimate and predict which container has the greater capacity before they begin their experiments. Have your children experiment with different containers and compare shapes and capacities using a variety of pourable materials. Tall and skinny glasses may hold the same amount of water as short and wide glasses. Remind your children that just because two glasses are different sizes, it does not necessarily mean they have different capacities. You may want to pour water, uncooked rice, beans, small cubes, or other classroom materials from one glass into the other to demonstrate how one has a greater, smaller, or equal capacity to the other. Then show two different shaped glasses and ask the question again. Which has the greater capacity? Which can hold more? Guide them to understand that the bigger container holds more and therefore has a greater capacity. Show your children a glass and a pitcher. We recommend doing plenty of hands-on activities together, such as cooking, baking, or just measuring a variety of classroom materials to help your children understand how the units are related. Your children should also be familiar with standard units of capacity, including cups, pints, quarts, and gallons. Some children may be familiar with volume, or the amount of space something takes up, which is usually measured in cubic units. Review with your children that capacity describes how much a container can hold. It is designed to complement the Cups, Pints, Quarts, Gallons topic page on BrainPOP Jr. This page provides information to support educators and families in teaching K-3 students about cups, pints, quarts and gallons.
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