Question

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015. Write a short note on "immunization",
Section D
016. Are plant and animal tissues the same? Name the different types of animal tissues and describe the key function of
each tissue.
017. Enlist the main postulate of Dalton's atomic theory. Give two limitations of the theory.
[5]
018. A boy 60 kg hops with a horizontal velocity of 5 ms-1 on a stationary skateboard. The skateboard weighs 4 kg. Find
out the velocity when the board starts rolling? The condition given here is that any external unbalanced force is absent.
[5]
019. Why is the law of gravitation said to be universal? Given the equation for universal gravitation. Explain clearly the
significance of this law.
[5]
Q20. What is the difference in between 'sign and symptoms'.OR Give a brief explanation about 'principle of prevention'
and 'principle of treatment'.
[5]
021. Give five differences between an atom and a molecule.
[5]
Section E
022. Take a bowl of water containing some amount of oil in it. How will you separate the two.
[2]
0 23. Take some items like a bark of a tree or a bone and identify what kind of tissues are present in it.
[2]
0 24. Water can exist in all the three states solid, liquid and gas. Conduct an experiment and describe what happens to
the particles during the change of state?
[2].
025. In our day to day life, we experience or come across different types of motions. Can you give an example of the
motion when; a. The acceleration is positive and in the direction of motion. b. The acceleration is uniform or the rate of
acceleration is constant.
[2]
026. When you stretch a rubber band what is the energy generated and lost?
[2]
027. Can you determine who has a higher pitch, a sparrow chirping or a tiger roaring? Justify your answer. [2]​

Answer 1

Answer:

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