Give three examples from your environment of: (i)Points                 (ii)  Portion of a line (iii)Plane surfaces    (iv) portion of a plane (v)Curved surfaces

Give three examples of angles from your environment.

Give three examples of line segments from your environment.

Give three examples from our daily life which are in the form of (i) a cone (ii) a sphere (iii) a cuboid (iv) a cylinder (v) a pyramid.

In which case bodies become hot due to mechanical energy losses (i) Rub our hands for sometimes (ii) Two vehicles collied with each other (iii) Aeroplane crases (iv) Sliding of legs on roof surface (v) Transfer of energy from hot energy from hot body to cold body

Give two new examples of each of the following three dimensional shapes: (i)Cone (ii) Sphere (iii) Cylinder (iv)Cuboid (v) Pyramid

Identify the correct order of steps in heterogeneous catalysis. (i) Adsorption of reactant molecules on the surface of the catalyst. (ii) Diffusion of reactant to the surface of the catalyst. (iii) Formation of reactions product on the catalyst surface. (iv) Diffusion of reactions product from the catalyst surface. (v) Formation of activated intermediate.

Violet light (lambda=4000A ) of intensity 4watt/m^(2) falls normally on a surface of area 10cm xx 20cm .Find (i) the energy received by the surface per second.(ii) the number of photons hitting the surface the surface per second,(iii) If surface is titled such that plane of the surface makes an angle 30^(@) with light beam, find the number of photons hitting the surface per second.

Given an example of a horizontal plane and a vertical plane from your environment.

Given three examples each of : (a) intersecting lines (b)parallel lines from your environment.

Give the specific function of: (i) Centrosome (ii) Stoma (iii) Transpiration (iv) Ureter (v) Vitreous humour