1. environmentEverything that surrounds a living
thing
5. stimulusanything that
causes a living
thing to react
2. external stimulus Anything in an organism’s
environment that causes it to react
4. responsea reaction to a stimulus
3. internal stimulusanything within an organism that
causes it to react
1. Shivering and putting on a sweater are an example of
responses to cold.
2. A snake’s forked tongue helps it to smell.
3. Sea otters find food by being able to detect vibrations
using their whiskers.
4. An example of internal stimuli is hunger pains.
5. For a moth, the sound of a bat is an external stimulus.
6. All living things react to their surroundings.
7. Many animals have 5 senses. They are sight, hearing,
touch, taste, and smell.
8. Echolocation is a form of detection using sound waves.
Bats and dolphins use echolocation.
9. Plants and animals react to both external and internal
stimuli.
10. Plants react to stimuli even though they do not have 5
senses.
4. Learned behaviorA behavior that is taught of learned
from experience
3. instinctA complex pattern of behavior
that organisms of the same type
are born with
2. Inherited behaviora behavior that an organism is born
with and does not need to learn
1. behaviorThe way that a living thing acts or
responds to its environment
1. Some animals hibernate, or go into a deep sleep, during
the winter months when food is scarce.
2. Birds, whales, fish, and insects migrate, or move to
another area, when it gets colder.
3. A reflex is a simple automatic inherited behavior.
4. As animals interact with their environment, they learn
new behaviors.
5. Examples of learned behaviors are riding a bike,
grooming each other, playing the piano, cooking,
reading, speaking, and writing.
6. People and some animals can learn different behaviors.
7. Examples of an instinct are making a web, turtles
moving toward the ocean after birth, hibernating,
migrating, and building a certain kind of nest.
8. Learning different behaviors can help an organism
survive.