| A | B |
| behavior | anything an animal does in response to a stimulus in its environment |
| circadian rhythm | a 24-hour cycle of behavior |
| hibernation | a reduced state of metabolism in the winter |
| estivation | a reduced state of metabolism in the summer |
| habituation | reduced sensitivity to familiar stimuli |
| pheromones | chemical signals |
| classical conditioning | learning by association |
| operant conditioning | receiving a reward or a punishment for a certain behavior |
| instinct | ritualistic and complex behavor patterns |
| fight-or flight response | a reflex |
| dominance hierarchy | the pecking order in a hen house |
| imprinting | a permanent attachment is made to an object immediately after hatching |
| Ivan Pavlov | classical conditioning in dogs |
| Konrad Lorenz | father of ethology |
| innate | inherited |
| Nastic Movement | thigmotropism |
| phototropism | a plant's response to light |
| gravitropism | roots grow down and shoots grow up |
| ethologist | a scientist that studies animals in their natural environments |
| insight learning | learning new information based on past experience |