MANOJ KUMAR (SHELFORD)
Showing posts with label science. Show all posts
Showing posts with label science. Show all posts
Monday, June 14, 2021
Saturday, February 11, 2012
summative assessment ii guess paper (science) for class x -2012
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SA2RT
(SUMMATIVE ASSESSMENT II REVISION
TEST)
SHELFORD TUTORIALS
1.
What
is the ultimate source of energy on earth?[1]
2.
What
is the scientific name of the yellow spot?[1]
3.
Define
reflection?[1]
4.
Define
Darwinism?[1]
5.
Yeast
reproduces through budding. (true/false).[1]
6.
Which
functional group does –CHO represents?[1]
7.
What
do you mean by valence electrons of and atom?[1]
8.
What
do you mean by a food web?[1]
9.
Differentiate
between the food web and the food chain?[2]
10. What is the power of
accommodation?[2]
11. Draw a ray diagram of a
concave mirror, when the object is placed at the focus.[2]
12. Draw structures of
1,2-dichloro,pentane and cyclohexane.[2]
13. What is Newlands’ law
of octaves?[2]
14. What is the function of
the vas-defrens and epididymis.[2]
15. Name two ways of
vegetative propagation.[2]
16. Differentiate between
implantation and fertilization in humans?[3]
17. show the difference between the recessive and
the dominant alleles?[3]
18. What do you mean by the
acquired and the inherited traits, which of the following is transferred to the
next generation ? give reason.[3]
19. Draw a well labeled
diagram of the human eye. Or. What are the corrective measures for the
hypermetropia and myopia, describe with figures[3].
20. What are sign
conventions for the convex mirror?[3]
21. A convex mirror used
for rear-view on an automobile has a radius of curvature of 3.00 m. If a bus is
located at 5.00 m from this mirror, find the position, nature and size of the image.[3]
22. Discuss speciation in
brief with the help of an example?[3]
23. A mixture of oxygen and
ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is
not used?[3]
24. What were the
limitations of Döbereiner’s classification?[3]
25. Why should we conserve
forests and wildlife? Suggest some
approaches towards the conservation of forests.[3]
26. Explain why the sky
appears reddish during the time of sunset and sunrise, name the phenomena
responsible for this.[3]
27. Describe the structure
and function of the male reproductive system.[5]
28. How is the equal
genetic contribution of male and female parents ensured in the progeny, also
elaborate how the sex of new individuals are determined.[5]
29. (a) Lithium, sodium, potassium are all metals that
react with water to liberate hydrogen gas. Is there any similarity in the atoms
of these elements?[21/2]
(b) Helium is an unreactive gas and neon is a gas
of extremely low reactivity. What, if anything, do their atoms have in common?[21/2]
30. An object, 4.0 cm in
size, is placed at 25.0 cm in front of a concave mirror of focal length 15.0
cm. At what distance from the mirror should a screen be placed in order to
obtain a sharp image? Find the nature and the size of the image. [5]
download word file
download word file
Best of luck
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