Chapter 1
Science
Class 7
Revision Test
Time : 40 min.
Marks : 20
Q.1. Fill in the blanks: (1 X 10)
1. The bodies of living organisms are made of tiny units called...........
2. The leaves have a green pigment green pigment called ..............
3. ............ is the ultimate source of energy for all the ultimate source of energy for all living organisms.
4. Slimy, green patches in ponds or in other stagnant water bodies are generally formed by the growth of organisms called ...........
5. ............ are nitrogenous substances which contain nitrogen.
6. Carbohydrates are made of ................ , ................ and ............
7. Mode of nutrition in which organisms take in nutrients in solution form from dead and decaying matter is called ......................
8. When an alga, and a fungus live together. This association is called as ...............
9. The bacterium called .................. can take atmospheric nitrogen and convert it into a soluble form.
10. .................... and ........... are the essential requirements for photosynthesis.
Q. 2. Identify the given figure of an organism and name the mode of nutrition followed by it: (1 X 5)
a.
b.
c.
d.
e.
Q. 3. Differentiate between autotroph and heterotroph. (2)
Q. 4. Describe photosynthesis in detail. (3)
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