1. TROPISM OR PLANTS RESPONSE TO FORCES AROUND THEM
7TH GRADE SCIENCE
MRS. TRAYA

2. PHOTOTROPISM?

4. Describe and Draw Plants response known as Phototropism
Describe and Draw Plants response known as Phototropism. Which structures of plants have positive response to light? Be sure you include the role of light or radiant energy

5. You’re right, plants stems and leaves respond positively to light
or radiant energy. This is known as Phototropism.

6. GRAVITROPISM?

7. Describe and illustrate gravitropism in your graphic organizer.

8. Which structures of plants respond positively to gravity? Why?

9. You got it! The roots are the structures in plants that respond positively to Gravity. And we call this tropism as Gravitropism.

10. Thigmotropism?

11. Thigmotropism
Touch Me Not is a thigmotropic plant.
Discuss with your team what this means?

12. Indeed you’re right. Thigmotropic plants are very sensitive to touch
Indeed you’re right! Thigmotropic plants are very sensitive to touch. We call this tropism in plants as Thigmotropism.

13. Turgor Pressure?

14. PLANT IS WILTING OR DYING DUE TO LACK OF
WATER INSIDE ITS VACUOLES
PLANT IS IN RIGID CONDITION
VERY HEALTHY DUE TO MUCH WATER IN ITS VACUOLES

15. Describe the condition of a plant due to lack of water?
How do you call the condition of a plant it has much water?
How do you call plants tropism due to having lack of water or plenty of
In the vacuoles?

16. Let’s Practice on Tropisms in Plants due to forces acting on them
Let’s Practice on Tropisms in Plants due to forces acting on them. Identify which tropism is shown in the pictures.

18. TURGOR PRESSURE

20. PHOTOTROPISM

21. Vines climbing walls

22. THIGMOTROPISM

24. PHOTOTROPISM

25. DESCRIBE THE CONDITION OF EACH PLANT.
WHAT CAUSES THESE SCENARIO TO OCCUR?

26. THE PLANT OF THE LEFT IF WILTING. (WITHERED)
THE ONE ON THE RIGHT IS RIGID OR TURGID. (HEALTHY)

27. Now complete your Vocabulary
Organizer on TROPISMS on Plants
Due to the forces around them.
Make sure that your work is neat
And yourdescriptions are complete.
Color it neatly!