Which is a chemical change? A. Melting ice B. Breaking a glass C. Burning wood D. Cutting paper 相关知识点: 试题来源: 解析 C。燃烧木材是化学变化。A 选项“融化冰”是物理变化;B 选项“打碎玻璃”是物理变化;D 选项“剪纸”是物理变化。化学变化会产生新物质,燃烧木材会产生新物质,所以选 C。
Which of the following is a chemical change? A. Melting ice B. Cutting paper C. Burning wood D. Folding clothes 相关知识点: 试题来源: 解析 C。解析:冰融化(Melting ice)、剪纸(Cutting paper)和叠衣服(Folding clothes)都是物理变化,燃烧木材(Burning wood)是化学变化。
The process of photosynthesis is a chemical change. Which of the following is a characteristic of this process? A. It does not require sunlight. B. No new substances are produced. C. It converts carbon dioxide and water into glucose and oxygen. D. It can occur in the absence of ...
结果1 题目 (A)6. Which of the following is a chemical change(化学变化)? A. Milk turns into yogurt. B. Water drips through stones. C. Water turns into ice. D. Candles turn to wax. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏 ...
百度试题 结果1 题目Which of the following is an example of a chemical change? A. Melting ice B. Boiling water C. Burning wood D. Dissolving salt in water 相关知识点: 试题来源: 解析 C 反馈 收藏
百度试题 结果1 题目A change in ___ a new substance is formed is called a chemical change.A.whichB.that 相关知识点: 试题来源: 解析 A 反馈 收藏
A change in which a substance changes its physical form but not its chemical composition is called a ___. A. physical change B. chemical change C. nuclear change D. biological change 相关知识点: 试题来源: 解析 A。“physical change”指“物理变化”,物质改变物理形态但化学组成不变;“chemical...
There is a chemical reaction in which a solid turns into a gas. This is an example of a(n) ___. A. physical change B. chemical change C. mixture D. solution 相关知识点: 试题来源: 解析 B。本题考查物质性质变化的类型。化学变化是指有新物质生成的变化,固体变成气体是有新物质生成的变化...
1__ we know, in a chemical change, energy cannot be created, ___.A.Which, nor can it be destroyedB.As, neither it can be destroyedC.As, neither is it able to be destroyedD.What, nor is destroyed 2___ weknow,inachemicalchange,energycannotbecreated, ___.A.Which, nor can ...
44. Which one of the following is not a kind of chemical change?A. Iron rusting. B. Burning wood. C. Cooking an egg. D. Water boiling. 相关知识点: 试题来源: 解析 D 钢铁生锈,木头燃烧,煮鸡蛋,都是发生了化学变化;而水被煮沸,是物理变化.是否是化学变化,就看是否产生了新的物质....