Guangdong-Shanghai version eight on "Sublimation and Condensation" ppt courseware package (including material files) The process of changing a substance from a state to a state is called vaporization, and it needs heat when vaporizing. The process of changing a substance from a state to a state is called liquefaction, and the process of changing from a state to a state is called melting. The process of changing a substance from a state to a state is called melting. The process of changing from state to state is called solidification, and heat is required during solidification. 2. When eating popsicles, after opening the wrapping paper, I saw the popsicles appearing as "white steam". Here, "white steam" water vapor (optionally "yes" or "no") is actually a phenomenon.
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