Summer HOLIDAY HOMEWORK 2016 -17
CLASS VII SCIENCE
MAKE QUIZ QUESTIONS ON CHAPTER ‘’ NUTRITION IN PLANTS’’
1. MAKE A CROSS WORD PUZZLE on nutrition in plants
2. Picture activity based on photosynthesis
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WHAT IS THE SOURCE OF ENERGY IN THE PHOTOSYNTHESIS
NAME THE GAS RELEASED
NAME THE GAS USED BY PLANTS FOR PHOTOSYNTHESIS
WHAT IS THE SOURCE OF WATER WHICH PART HELPS TO ABSORB WATER
Which part trap sunlight
4.WHAT IS THE FUNCTION OF STOMATA
5.WHY IS SUN CALLED ULTIMATE SOURCE OF ENERGY .
6.PHOTOSYNTHESIS CANNOT TAKE PLACE IN NIGHT,why?
7.ALGAE ARE GREEN.WHY?
8 DEFINE AUTOTROPHIC AND HETEROTROPHIC MODE OF NUTRITION.
9 GIVE ONE EXAMPLE OF EACH—SAPROPHYTE,PARASITE,SYMBIOTIC PLANT.
I.
Tick the correct option
1.Which of these are necessary for photosynthesis to take place?
i) Carbon dioxide ii) Chlorophyll. iii) Water iv) All of these
2.THE NUTREINT PRODUCED DURING PHOTOSYNTHESIS IS
A]carbohydrate b]fat c]proteins d]vitamins
3.the excess carbohydrates is stored in plants in the form of
A] starch b]glucose c]vitamins d]fat
4.leaf is green due to the presence of
A] chlorophyll l b] carotene c] xanthophyll d]none
5.The photosynthesis takes place in
A] stem b ]leaf c ]fruit
d ]roots
IV.
Fill in the blanks-
1.
Tiny pores on the surface of leaves are called _______________.
2.
Photo means _______________and synthesis means _____________.
3.
______________ and _____________ are the two raw materials needed for photosynthesis.
4.
Carbon dioxide is taken in from the _________by the leaves for photosynthesis
5.
Water and minerals are transported to the leaves by the ___________ which run like pipes
throughout the root, the stem, the branches and the leaves.
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Read the following passage and answer the questionsPHOTOSYNTHESIS — FOOD MAKING PROCESS IN PLANTS
Leaves are the food factories of plants. The synthesis of food in plants occurs
in leaves. Therefore, all the raw materials must reach there.
Water and minerals present in the soil are absorbed by the roots and transported to the leaves.
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Carbon dioxide from air is taken in through the tiny pores present on the surface of the leaves.
These pores are surrounded by ‘guard cells’. Such pores are called stomata.
The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the
sunlight. This energy is used to synthesize (prepare) food from carbon dioxide and water. Since
the synthesis of food occurs in the presence of sunlight, it is called photosynthesis (Photo: light;
synthesis: to combine).
. The solar energy is captured by the leaves and stored in the plant in the form of food. Thus, sun
is the ultimate source of energy for all living organisms.
The green pigment present in leaves is called _______________.
The function of chlorophyll is to capture ____________ in the process of photosynthesis.
__________ is called the ultimate source of energy.
Water and minerals are absorbed by the roots from the ___________.
Stomata are surrounded by ___________ cells.