Title: Stimulus and Response
1Stimulus and Response
- Why animals and plants do what they do
- OR
- A fancy way of saying cause and effect in the
animal world.
2Catalyst
- 1. Describe a situation in which you were
immediately scared and/or reacted quickly to
something. Write at least 1 paragraph with 4
sentences describing your experience. - 2. Take out your vocab books and your colors.
- 3. Take out your dry erase board.
3After today you will be able to
- 1. Identify and classify stimuli as internal or
external - 2. Define a response.
- 3. Identify behavior as learned behavior or
instinct.
4What is a stimulus?
- Stimulus any change in an organisms environment
that causes the organism to react. It is a fancy
way of saying cause. - Stimulus singular
- Stimuli plural
- Example An animal is cold so it moves into the
sun. - (Add this word to your vocabulary book)
5What is a response?
- Response how the organism reacts to a stimulus
and results in a change in behavior. It is a
fancy way of saying effect. - Example Getting a drink when you are thirsty.
- (Add this word to your vocabulary book)
6Examples of stimuli and their responses
- You are hungry so you eat some food
- A rabbit gets scared so it runs away
- You are cold so you put on a jacket
- A dog is hot so it lies in the shade
- It starts raining so you take out an umbrella
7Plants also respond to their environment. When a
plant grows towards the sun we call this
phototropism.
8Think Pair - Share
- Turn to your partner and share two other stimuli
and their responses.
9There are two types of stimuli
- External Stimuli
- and
- Internal Stimuli
10External Stimulus
- External stimulus a stimulus that comes from
outside an organism. - Examples
- 1. You feel cold so you put on a jacket.
- 2. A snake lunges at a rabbit so it runs away.
- 3. A dog feels hot so it goes to lay in the
shade. - Add this word to your vocabulary book.
11Internal Stimulus
- Internal stimulus a stimulus that comes from
inside an organism. - Examples
- 1. You feel hungry so you eat some food.
- 2. A cat feels thirsty so it drinks water.
- 3. A dog feels hot so it goes to lay in the
shade. - Add this word to your vocabulary book.
12Make a T-chart on your dry erase board and label
the columns internal and external. Put the
letter of each stimulus in the proper column.
- You have a stomach ache and decide to lay down.
- A bird is thirsty and drinks some water.
- A squirrel sees a cat and runs up a tree.
- A lion gets hungry and eats a gazelle.
- You see a spider and scream.
13Animals can respond to stimuli in two ways
- 1. In a way that they learned. We call this
learned behavior. -
- OR
- 2. In a way that they were just born knowing how
to do. We call this instinct. -
14- Learned behavior a response to a stimulus that
an animal was taught. - Add this word to your vocabulary book
15A mother bear teaching her cubs to fish
16Teaching an animal a trick
17Training a dog
18Even you have learned behavior. For example, you
learned to read and to talk.
19- Instinct an animals natural reaction to a
stimulus. It is an automatic reaction that the
animal was not taught to do. - Add this word to your vocabulary book
20Animals natural instinct is to run away from
danger. We call this the need for safety.
21Animals will naturally find or make themselves a
home because they have a need for shelter.
22Animals will naturally look for food and water.
23Animals that need to will naturally migrate.
24Animals instinctually know to store their food
for the winter.
25Think Write - Share
- On your board write down one learned behavior
that you have an one instinct that you have.
26Summarize what you have learned today. On a
sheet of NBP answer the following questions.
- What is a stimulus?
- What is a response?
- Give one example of a stimulus and its response.
- What is an internal stimulus?
- What is an external stimulus?
- It is raining and you open up an umbrella. Is
this an internal or external response? Justify
your answer. - What is learned behavior?
- What is an instinct?
- When a rabbit runs away from a wolf is this
learned behavior or instinct? Justify your
answer.