What happened to an iron bar if it is heated from 32 degree Celsius to 64 degree Celsius

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid