chapter 6--Plants Makes Food

PLANTS MAKE FOOD

KEY WORDS

Leaflets	producers
sugar	Photosynthesis
glucose	starch
Carbon dioxide	Chlorophyll
pigment	stomata
sunlight

Define the terms

1.  Germination: It is the process by which a seed starts growing or developing into a new plant.

Lab experiment

	Colour change observed in the leaf
Observation	The leaf turned blue black after putting few drops of iodine
Conclusion	The leaf contains starch

Question and Answers

Q-1 What is Photosynthesis?

Ans:

Photosynthesis is the process in which a plant converts solar energy into useful chemical energy.

. Carbon dioxide + Water (in the presence of sunlight  and chlorophyll)

Gives ---------   Oxygen + Glucose

Q-2 Which three important things are required by the plants to make food?

Ans: Show flow chart on page 4 of TM

Q-3 List the factors that influence the rate of photosynthesis in plants.

Ans- 3 Factors affecting rate of photosynthesis in plants are:

1.    Sunlight

2.    Water

3.    Carbon dioxide in the air.

Q-4 Explain the statement: Water is a key component for the process of photosynthesis.

Ans: Without any of the component (water, carbon dioxide and sunlight) plant will be unable to make its food and cannot survive. So water is a key component for the process of photosynthesis.

Q-5 Little plants find it difficult to grow in rainforests. Give Reason.

Ans: As  tall trees are found in abundance in rainforests,  little plants can hardly receive sunlight for photosynthesis.

Q-6 If we find a way to keep stomata open at night, would that lead to higher rate of photosynthesis?

Ans: No, even if we find a way to keep stomata open at night, it would not lead to higher rate of photosynthesis in plants

as plants require sunlight for photosynthesis which is not available at night.

HOMEWORK

Draw the Figure 6.2 (Stomata open,Stomata close) on page no.44 in EVS Notebook