Which of the following is an example of an observation? Multiple Choice Gases expand as their temperature increases because the gas molecules are moving more rapidly. Paraffin wax begins to melt at 57°C. Three samples of wax are heated to 75°C. The force acting on an object is equal to its mass times its acceleration. Will all waxes melt at the same temperature?

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

Is there any opitions? if you have the periodic table, the noble gases are 8a family, the halogen are the 7a family, and the nonmetal are  carbon, nitrogen, phosphorus, oxygen, sulfur, selenium, fluorine, chlorine, bromine, iodine and astatine.

The answer would be d. hope this : ))