Interference

Constructive interference is when the crest of a wave is super-positioned with the crest of another wave to increase the amplitude. Destructive interference is when the crest of a wave is super-positioned with the crest of another wave to decrease the amplitude. One example of when something that interferes and makes it larger is when your baking a cake and you add milk or water to the batter. When you add milk or water, it interferes with the cake mix and makes the batter larger in amount.  One example of when something that interferes and makes it smaller is when you put water and flowers in a vase and you leave it there. When the water interferes with the flowers, the flowers need water to survive so some of the water disappears into the roots of the flowers.