四、升华和凝华（Four, sublimation）.doc

四、升华和凝华（Four, sublimation） Four, sublimation Fill in the blanks 1. write the name of the change of state in the line behind the corresponding phenomenon. The camphor ball in the closet gets smaller and disappears:; In winter, when the water vapor in the air gets cold, it forms a needle like frost on the wire:; The summer popsicle braved the white gas:; Clothes that freeze in winter are naturally dry:. 2. iodine sublimation experiment, to use the alcohol lamp heating slightly, that the solid sublimation to absorb heat, it can be inferred from the gas to _______ sublimation. 3. solid carbon dioxide sublimation to ___________ heat, so it is commonly used to transport the instrument _____, to prevent food spoilage. 4. people who wear glasses to drink boiling water, the lens blurred, this is _____ phenomenon, a layer of white appeared on the wrapping paper of popsicle, these white powder is water vapor in the air and the _______. 5. when the winter temperature is low, the window can be frost (Bing Hua), this is the water vapor ______ phenomenon. Cream should knot in the glass room ______ (fill: inside or outside side). 6. health balls in the closet, a few months smaller or disappear, this is the phenomenon of _______ health ball. 7. the process by which matter is changed from state to state is called sublimation and heat when sublimation. 8. Harbin cold winter, the park ice sculpture works will be reduced day by day, this is the phenomenon. 9. talk about the changes in the state of matter in the following phenomena and explain the heat release. A iodine into gas ___________ purple B health ball small _______________ The formation of _______________ C cream D fog and dew formation ______________ Water freezes _______________ E F summer clothes to be dried _____________ G ice into water _______________ H winter mouth white breath _____________ I winter window formed on the surface of a layer of ice ______________ Two, multiple-choice questions The 1. winter morning in the