Time: 2:45 hours M.M: 80
· Multiple choice questions-
1. The unit of pressure is-
a. Newton
b. N/m
c. Nm
d. N/m2
2. How many Joules are in 1 kilowatt hour-
a. 3600
b. 3.6 x 108
c. 3.6 x 103
d. 3.6 x 106
3. The biotic components of the biosphere is-
a. Air
b. Water
c. Soil
d. All of these
4. Symbol of iron is-
a. N
b. Na
c. Fe
d. Mg
5. Cause of diseases-
a. Protozoa
b. Bacteria
c. Virus
d. All of these
6. Amphibian of plant kingdom is-
a. Thallophyta
b. Pteridophyta
c. Bryophyta
d. Gymnosperms
7. In which cell organelle are chromosomes found?
a. Mitochondria
b. Ribosome
c. Nucleus
d. Pigment
8. The metal that is found in the liquid state at room temperature-
a. Mercury
b. Iron
c. Copper
d. Sodium
· Fill in the blanks -
9. …………..is the ability to do work.
10. The biosphere is made up of two components ………………….. and ……………….. .
11. Smallpox vaccine was invented by ………………….. scientists.
12. The value of acceleration due to gravity is ………………. at different places.
13. Rusting of iron is a …………….. change.
14. Scientific name of human is ……..……… .
· Very Short Answer Questions-
15. What is the percentage of oxygen in the air?
16. Which force causes objects to fall freely towards the earth?”
17. What are the forms of mechanical energy?
18. What is the basic characteristic of classification?
19. Name the disease spread by mosquito bite.
20. Which scientist discovered the cell?
21. By what name Newton’s first law is known?
22. What is full name of AIDS?
23. What is the unit of force?
· Short answer questions-
24. What is the universal law of gravity?
25. What is greenhouse effect?
26. Write full form of LPG and CNG.
27. If the weight of an object on earth is 10 N, then what will be its weight on the Moon?
28. A 60 W electric bulb is used for 6 hours a day. Calculate the energy consumed by the bulb in 1 day in ’units’.
29. What are the things needed for good health?
30. What infectious disease and non infectious diseases?
31. What is pressure? Write its unit.
32. Essay type questions-
a. Write Archimedes’s principle.
b. Write the applications of Archimedes’s principle.
OR
A block of wood is kept on a tabletop. The mass of wooden block is 5 kg and its dimensions are 40cm x 20cm x 10cm. Find the pressure exerted by the wooden block on the tabletop with its dimensions.
A) 20cm x 10cm
B) 40cm x 20cm
33. An object of mass 40kg is raised to a height of 5m from the earth. What will be its potential energy? If the object is allowed to fall freely, what will be the kinetic energy of the object when the object is halfway down?
34. Write a short note on the following-
A) Ozone layer
B) Water pollution
35. Draw a labeled diagram of animal cell and plant cell.
OR
Write down the names of compounds represented by the following formulae-
(a) CaCl2
(b) NaCl
(c) KNO3
(d) H2SO4
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