Directions: In this section, the following sentence has a blank space and is followed by four words. Select the word you consider most appropriate to fill in the blank space and indicate your response on the Answer Sheet accordingly.

The first law of thermodynamics states that whereas energy can be ____________ from one form into another, it cannot be created or destroyed.

The streaming of light beams coming from the Sun through trees is said to have suggested that light travels in straight line. The particles on the path of light beams are visible to us because

The flash of lightning is seen before the thunderstorm is heard. It verifies that

The potential difference between the two end terminals of an electric heater is 220 V and the current through it is 0.5 A. What would be the current through the heater if the potential difference across the terminals of the heater is reduced to 120 V?