a0a647e4_Weather__Making_Hot_and_Cold__Statement
[True or False] 6 True [Statement] 
Consider a sample of water at 20 degrees Celsius. If its temperature increases by a few degrees, its density will decrease. True. The density of a substance is the mass of the substance divided by its volume. Raising the temperature has no effect on mass. But the increased thermal energy will cause the sample to expand. The higher temperature is an indicator of increased, thermal molecular movement. If volume increases and mass stays the same, the density of the substance will decrease.
Weather: Making Hot and Cold
Statement