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。
A. Melting ice B. Breaking a glass C. Rusting of iron D. Folding a piece of paper 相关知识点: 试题来源: 解析 C。本题主要考查化学变化的定义。A 选项冰融化是物理变化,物质的状态改变但没有新物质生成。B 选项打破玻璃也是物理变化,只是物质的形状改变。C 选项铁生锈是化学变化,有新物质生成。D ...
A. Melting ice B. Breaking a glass C. Rusting of iron D. Folding a paper 相关知识点: 试题来源: 解析 C。本题考查化学反应的定义。A 选项冰融化是物理变化,物质的状态发生改变但没有新物质生成。B 选项打破玻璃也是物理变化,只是物质的形状发生改变。C 选项铁生锈是铁与空气中的氧气和水发生反应生成...
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
For example, regional differences are expected for se-ice physical properties (e.g., dynamic deformation, thermal processes (melting and freezing)), and chemical composition. These factors are expected to have non-negligible impacts on key processes of the Hg cycle, such as redox reactions and ...
According to Russell, the present chemical and physical changes occurring in the Southern Ocean were not predicted by global climate change models before. Russell also holds the Thomas R. Brown Distinguished Chair in Integrative Science. “We underestimated how much influence that added freshwater and...
18.to change to ice; freeze. 19.to become coated with ice (often fol. byup). Idioms: 1.break the ice, a.to overcome initial social awkwardness or formality. b.to make an effective beginning. 2.cut no ice,to fail to impress or influence. ...
Atmospheric Processes: Climate change and variability (16161635330942154513Atmospheric Processes: Paleoclimatology (04734900We examine the impact of melt water percolation on the soluble ion chemical record from the Lomonosovfonna ice core. Principle component analysis shows that melting produces only simple...
Although nucleation is a stochastically driven process, an unambiguous evaluation of the underlying physical processes from experimental data is challenging. This is because it is difficult to obtain nanoscale control of the physicochemical properties of the nucleating substrate while observing a significant...