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。
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. 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.反馈 收藏
Which of the following is a sign of a chemical reaction? A. Change in color B. Change in shape C. Change in position D. Change in size 相关知识点: 试题来源: 解析 A。颜色的变化通常是化学反应的标志,形状、位置和大小的变化可能是物理变化导致的。反馈 收藏 ...
一个改错不会The change in which a new substance is formed calls a chemical change.相关知识点: 试题来源: 解析 calls-- is calledd生成一种新物质的变化叫做化学变化.the change in which a new substance is formed 是主语,句子应用被动语态,所以动词用be called....
B. A change in volume. C. A change in mass. D. A change in position. 相关知识点: 试题来源: 解析 A。解析:温度变化是化学反应的一个标志。选项 B 体积变化不一定是化学反应引起的;选项 C 质量变化在一般化学反应中不太明显;选项 D 位置变化与化学反应无关。反馈 收藏 ...
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 change”是“化学变化”,化学组成改变;“nuclear change”是“核变化”;“biological change”是“生物变化”。答案为 A。 反馈 收藏 ...