WHAT DO I EAT? The prickly pear, like most other plants, eats through photosynthesis and drinks water. However, because the prickly pear is a desert plant it has adapted to the dry soil of the desert, and does not need much water to keep it satisfied. Photosynthesis occurs when plants take light energy and converts it into chemical energy.
A measuring cup can be used to measure volumes of liquids. This cup measures volume in units of cups, fluid ounces, and milliliters. Volume is the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains. Volume is often quantified numerically using the SI derived unit, the cubic meter.
Metric system: units of volume. Let's think a little bit about the metric system units for volume, or essentially how much space something is taking up in three dimensions. So the base unit in the metric system for volume is the liter. And there's a couple of ways that you can visualize a liter. One way you could think about a liter is if you took a cube that is 10 centimeters deep, 10 centimeters wide, and 10 centimeters tall, then this amount of space that you're taking up, this volume is 1 liter.