#### Term 1 Two Marks Model Questions

9th Standard

Reg.No. :
•
•
•
•
•
•

Science

Time : 01:00:00 Hrs
Total Marks : 50
11 x 2 = 22
1. Differentiate phototropism from photonasty.

2. Define transpiration.

3. Define photosynthesis.

4. Draw the diagram of open stoma and label the parts.

5. In the given photosynthetic experiment, what will happen to the leaf closed with black paper in starch test? Why?

6. Mention the differences between stomatal and lenticular transpiration

7. Name the cell that surrounds the stoma.

8. Who discovered the plant hormone auxin?

9. Give one example for nictinasty.

10. Name the types of transpiration.

11. Define food chain..

12. 14 x 2 = 28
13. What is the full form of SI system?

14. Convert : 104°F in to Celsius scale.

15. Give two examples of transparent medium that are denser than air

16. Concave mirrors are used by dentists to examine teeth. Why

17. Define Sublimation

18. What produces more severe burns, boiling water or steam? Why?

19. Copy the following and write the names of the laws and their simple definitions in the space provided.

20. Give an example for a plant whose leaf shows a mesmerizing movement.

21. Name the minute openings seen on the lower surface of the leaf.

22. Fill in the blanks:
6CO2+________$\overset { Sunlight }{ \underset { Chlorophyll }{ \longrightarrow } }$ _____ +6H2O+6O2 $\uparrow$

23. Define taxonomy?

24. What is silver revolution?

25. Differentiate : Macronutrients from micronutrients