Unit 2 – Nature’s Balance Science Vocabulary amount The amount of something is how much of it there is. Three hundred jelly beans is a large amount of candy. behavior Behavior is what a person or animal does. Squirrels store nuts for the winter, it’s part of their behavior. decrease When something decreases, it becomes smaller in number, amount or in size. The amount decreases after each slice is taken away. increase To increase means to grow in size or in number. When our dog eats too much food, its weight increases. supply A supply is the amount you have of something. They have a large supply of canned peaches. Academic Vocabulary balance When things are in balance, they are even. The two sides of the scale are in balance. control To control means to make a person or thing do what you want. The boys control where the car goes. interact To interact means to act together. The students interact with each other to do a science project. react When things happen, you usually react to them. The child reacts to the snowball. scarce When something is scarce, its hard to find or get. Food is scarce in this store.