绝对是chemical change chemical change是指original chemicals(s) change into new chemical(s)，例如：电解水份会有氢气和氧气 H2O→H2+O2 (未平衡化学式) physical change是指形态上的转换，不会有new matter，例如：水沸腾变成水蒸气 H2O(liquid)→H2O(gas) 金属(original substance)和空气中的氧气...
根据第四段的陈述以及该段最后一句话“Sothe dissolving of anything is a physical change. "可得出答案。23.C推理判断题。从文章最后一段可以得出正确答案。 相关推荐 1 IⅣ.阅读理解(2017·辽宁省实验中学)Chemical Change and Physical ChangeThere are two kinds of changes chemicalchange and physical change...
to liquid is a physical change.When butter is heated, it becomes liquid. When it cools down, it turns back into solid butter. Whether it is solid or liquid, it is still butter. This change, like all changes of state, is a physical change.A large lump of dough can be rolled out ...
Physical vs Chemical Change Chemistry is the study of the properties and interactions of chemical substances. Consider a ball of dough rising before being put into an oven. While a baker may see a lump of uncooked bread proofing before baking, a chemist would be interested in the chemical ...
PHYSICAL AND CHEMICAL CHANGE - GRADE 10 ? Prestik Method: 1. Choose a reaction from any that have been used in this chapter or any other balanced chemical reaction that you can think of. To help to explain this activity, we will use the decomposition reaction of calcium carbonate to ...
Physical and Chemical Changes Chapter 1 Activity 3: Physical and Chemical Changes What Happened in Activity 3? Solid Aluminum was added to a solution of Copper (II) chloride Al(s) + CuCl2(aq) → ? Name a physical change that occurred??? How do you know it was a physical change??? Na...
second-harmonic phase determination by real-time in situ interferometry.[2017][physical chemistry chemical physics pccp].二次谐波相位确定原位实时干涉测量。[2017][物理化学化学 热度: 页数:7 An Investigation of the Effects of Chemical and Physical Weathering on Submerged Karst Surfaces 热度: 页数:...
Chemical Change and Physical Change There are two kinds of changes-chemical change and physical change.In a chemical change, there is always a new substance formed. Breaking up water into hydrogen and oxygen is a chemical change. In each of the chemical change at least one new substance is ...
Physical Change A change that affects 1 or more physical properties. Examples – a melting popsicle, cutting wood, dissolving sugar, crushing a can DOES NOT AFFECT THE IDENTITY of the matter. Chemical Change Occurs when 1 or more substances change into new substances that have new or different...
allowing them to be active at very cold or very hot periods and to keep up tiring activity for a long time.Animals such as lizards(蜥蜴)rely on moving in and out of the warm sunlight to regulate their body temperature.They slow down when they can't warm up and may die if they can'...