1. Is it possible for plants to move? Explain your ideas.
Walk-In
Take out notebook, folder, pencil box and agenda.
Answer at the back in sentences:
Is it possible for plants to move? Explain your ideas.

2. Answer
Plants can be moved BY something, like the wind blowing on them, or someone or something moving them.
But can plants move all on their own?!??!?

3. Walk-In
Take out notebook, folder, pencil box and agenda.
Copy the question at the back and answer:
What is the difference between a stimulus and a response?

4. A stimulus is the action done to something.
Answer
A stimulus is the action done to something.
The response is the reaction to the stimulus.

5. TROPISM
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6. Set up for Cornell notes
Narrow column on the left, wider column on the right.

7. Stimulus
A STIMULUS is an action done to something, and it can cause a reaction.
Example: What response would you have to the stimulus of someone bringing a pencil close to your eye?
Try this reaction time game: Put your hands on top of a partner’s hands. The partner below should try to quickly tap the hand on top. If you tap the hand, you score a point. If the person on top moves their hand away, they score a point.
Try it! Switch when you are told to!

8. The response is the reaction to a stimulus.

9. Example of Stimulus in Plants
A gardener adds fertilizer pellets to plants growing in pots. They grow taller twice as fast!
What was the STIMULUS?
What was the RESPONSE?

10. Plants on the move!
Watch this clip about how plants move in response to how much light, how much soil, etc. they get!

11. Tropism
Plant growth in response to a STIMULUS (something in its surroundings). .

12. Three types
Geotropism
Phototropism
Hydrotropism .

13. Plant grows down with gravity. Plant grows opposite to gravity
GEOTROPISM
* Geo means earth.
Geotropism is the growth of a plant in response to gravity.
Negative Geotropism
Positive Geotropism
Plant grows down with gravity.
Ex. roots growing down
Negative Geotropism
Plant grows opposite to gravity
Ex. stems grow up
Positive Geotropism
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14. IMPORTANCE OF GEOTROPISM
Pulls roots down to anchor a plant
Roots can get water and
minerals if they stay in the soil
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15. Ex. Stems growing toward the window to get to the light
PHOTOTROPISM
“Photo” means light.
Phototropism is plant growth toward a source of light.
Ex. Stems growing toward the window to get to the light

17. IMPORTANCE OF PHOTOTROPISM
Lets leaves be in the best position possible to receive enough light for photosynthesis
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18. Hydrotropism Hydro means water.
Hydrotropism refers to a plant growing toward a source of water.
This allows the plant to stay alive and to do photosynthesis.

19. Tropism Movie
Watch this short movie about tropism and the amazing abilities of plants to “move”!

20. Why is hydrotropism important for a plant?
Exit Ticket
Write name and period #.
Answer in bullet form:
Why is hydrotropism important for a plant?

21. Tropism Mini-Book – Fold your paper as shown in class.
Page 1 - Write the definition of tropism (look back in your notes!).
Write the definition of and do a picture to illustrate for:
Page 2 – Geotropism
Page 3 – Phototropism
Page 4 - Hydrotropism

22. Tropism Song
Watch this song and read along with the lyrics that tell about tropism!