Question

Q26.Write the answers in 2-3 lines. 2*5=10

a.Write one use each of convex and concave mirror.

b.Differentiate between self and cross pollination.

c.A simple pendulum takes 64 seconds in completing 40 oscillations.Calculate its time period.

d.When the current is passed through a wire,a compass needle kept nearby gets deflected from its N-S position.Explain.

e.Outline your role as an active citizen in relation to controlling global warming.

Q27.Write the answers in 4-5 lines. 3*3=9

a.Draw a labeled diagram of human excretory system.

b.Explain what are decomposers?What is their role in a forest?Give two examples.

c.Explain how groundwater is recharged.

Q28.Write the answer in 8-10 lines. 5*1=5

Explain the working of an electric bell with the help of a diagra​

Answer 1

Answer:

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