(1) Energy

(2) Power

(3) Electric charge

(4) Electric current

(1) Glass slab

(2) Convex lens

(3) Concave lens

(4) Prism

(1) Nuclear fission

(2) Nuclear fusion

(3) Cold fusion

(4) Superconductivity

(1) Light energy

(2) Kinetic energy

(3) Thermal energy

(4) Potential energy

(1) Tendency to gain electrons

(2) Low electro negativity

(3) low ionization energy

(4) Malleability

(1) Regulation of blood sugar

(2) Enzyme activation

(3) Detoxiation

(4) Reproduction

(1) Photoelectric emission

(2) Nuclear fission

(3) Nuclear fusion

(4) Thermionic emission

(1) a parabola

(2) a horizontal straight line

(3) a vertical straight line

(4) a circle

(1) Biogas

(2) Solar

(3) Wind

(4) Coal

(1) Transpiration

(2) Photosynthesis

(3) Diffusion

(4) Osmosis