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國二上理化2-1物質的三態與性質課文重點複習
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乾冰所造成的煙霧效果,這煙霧是二氧化碳或水蒸氣或液態水?
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物質由液態變為固態的過程稱為( ).
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冰塊與食鹽以質量比( )的比例混合,作為冷劑.
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物質受熱時,由固態直接變為氣態的現象稱為( ).
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物質冷卻時,由氣態直接變為固態的現象稱為( ).
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結晶法是利用物質的( )高低不同來分離物質.
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物質在凝固.凝結.凝華時的過程屬於( )熱反應.
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由二種或二種以上的物質混合而成,其組成與性質皆不固定, 仍保有其組成物質的性質, 如食鹽水.空氣等, 稱為( ).
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物質發生變化時,組成與性質改變,且產生新物質,稱為( )變化.
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物質在熔化.汽化.昇華時的過程屬於( )熱反應.
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燒開水沸騰時,所看到的白煙是( )態水
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物質三態中, ( )態的體積具可壓縮性.
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不須經過化學變化,就可觀測到的性質如密度.沸點等,是屬於( )性質.
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由單一物質組成,具有固定的組成與性質, 如金. 氯化鈉等, 稱為( ).
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物質由固態變為液態的過程稱為( ).
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物質由氣態變為液態的現象稱為( ).
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物質發生變化時,組成與性質不變,沒有新物質產生, 稱為( )變化.
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物質由液態變為氣態的現象稱為( ).
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須經過化學變化,才可觀測到的性質如可燃性.活性等,是屬於( )性質.
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過濾法是利用物質( )不同來分離物質.
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