Question

1. Write the criteria used for the classification of organisms as proposed by Whittaker.

2. What causes the phenomena of sunrise, sunset and change of seasons? How do we perceive this

cause?

3. Differentiate between kharif and rabi crops. Mention the months in which these are sown. Give

one example of each.

4. Give reasons for the following:

(a) It is dangerous to jump out of a moving bus.

(b) Vehicles are provided with shockers.

5. Write any two applications of chromatography. Also write a condition necessary for

chromatography.

6. State Law of Conservation of Energy and express it in the form of an equation for a body of

mass m falling from a point A at height h, above the ground at (a) A, (b) B at a height from

ground, (c) C.

OR

Define power. State commercial unit and SI unit of electrical energy. An electric heater of 400 W

works for 2 hours. Find the electrical energy units consumed in a day

Answer 1

mode of nutrition, complexity of cell structure ,complexity of organisms body and phylogeny