melting icecream, chemical change , physical change, tearing paper , chemical change , physical change, baking cake, chemical change , physical change , fireworks exploded , chemical change , physical change , blowing balloon, chemical change , physical change , burning a candle , chemical change , physical change , molding playdough, chemical change , physical change , leaves color change , chemical change , physical change , melting chocolate , chemical change , physical change , crushing a dry leaf, chemical change , physical change , frying pancakes , chemical change , physical change , peeling an orange , chemical change , physical change , popcorn popping, chemical change , physical change , baking pizza, chemical change , physical change , spoiled meat, chemical change , physical change , grating cheese , chemical change , physical change , rusting iron , chemical change , physical change , breaking a dry stick , chemical change , physical change , sharping a pencil , chemical change , physical change , cutting a sandwich , chemical change , physical change , silver jewellery turned dark, chemical change , physical change , crushing a plastic bottle , chemical change , physical change , breaking glass , chemical change , physical change, burning paper , chemical change , physical change.

lesson 15

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？