chemical change

简明释义

化学变化

英英释义

例句

1.When iron rusts, it undergoes a chemical change 化学变化 that transforms it into iron oxide.

当铁生锈时，它经历了一个chemical change 化学变化，将其转变为氧化铁。

2.Baking a cake involves several chemical changes 化学变化 as the ingredients react to heat.

烤蛋糕涉及多个chemical changes 化学变化，因为原料在加热时发生反应。

3.When vinegar is mixed with baking soda, a chemical change 化学变化 occurs, producing carbon dioxide gas.

当醋与小苏打混合时，会发生一个chemical change 化学变化，产生二氧化碳气体。

4.Digestion is a series of chemical changes 化学变化 that break down food in our bodies.

消化是一系列的chemical changes 化学变化，将食物分解在我们体内。

5.The burning of wood is a chemical change 化学变化 that produces ash and smoke.

木材的燃烧是一个chemical change 化学变化，会产生灰烬和烟雾。

作文

In the realm of science, understanding the concept of chemical change is fundamental. A chemical change refers to a process where substances transform into different substances with distinct properties. This transformation occurs at the molecular level, involving the breaking and forming of chemical bonds. For instance, when iron rusts, it undergoes a chemical change as it reacts with oxygen in the presence of moisture, resulting in iron oxide, commonly known as rust. This process illustrates how a simple element can evolve into a compound through a chemical change. Another common example of a chemical change is the combustion of wood. When wood burns, it reacts with oxygen, producing heat, light, carbon dioxide, and water vapor. The original wood material is no longer present after the fire; instead, new substances have been created, exemplifying the irreversible nature of many chemical changes. Unlike physical changes, which might alter the form or appearance of a substance without changing its composition—such as melting ice into water—a chemical change alters the very identity of the substance involved.Learning about chemical changes is not only crucial for students of chemistry but also for everyday life. For example, cooking involves numerous chemical changes. When you bake a cake, the ingredients undergo chemical changes as they are heated, resulting in a fluffy, delicious dessert. The proteins in eggs coagulate, sugars caramelize, and various flavors develop, all thanks to chemical changes that occur during the baking process.Moreover, understanding chemical changes can help individuals make informed decisions regarding health and safety. For instance, knowing that certain cleaning products undergo chemical changes can inform consumers about their effectiveness and potential hazards. Some cleaners release harmful gases when mixed, showcasing the importance of understanding the chemistry behind these products.In addition, environmental awareness is heightened by understanding chemical changes. The process of photosynthesis, where plants convert carbon dioxide and water into glucose and oxygen, is a vital chemical change that sustains life on Earth. Recognizing this process underscores the importance of preserving plant life and maintaining a healthy environment.In conclusion, the study of chemical changes is essential across various fields, from chemistry to environmental science and everyday life. By grasping the significance of chemical changes, we can appreciate the dynamic nature of matter and the intricate processes that govern our world. Whether it's observing rust form on a bicycle, enjoying a freshly baked cake, or understanding the role of plants in our ecosystem, chemical changes are all around us, shaping our experiences and our understanding of the universe.

在科学领域，理解化学变化的概念是基础。化学变化指的是一种过程，其中物质转变为具有不同性质的新物质。这种转变发生在分子层面，涉及化学键的断裂和形成。例如，当铁生锈时，它与氧气在潮湿环境中反应，生成氧化铁，通常称为锈。这一过程说明了一个简单元素如何通过化学变化演变为化合物。另一个常见的化学变化例子是木材的燃烧。当木材燃烧时，它与氧气反应，产生热量、光、二氧化碳和水蒸气。火灾后，原来的木材材料不再存在；取而代之的是新物质的产生，展示了许多化学变化的不可逆性。与物理变化不同，物理变化可能会改变物质的形态或外观，而不改变其成分——例如将冰融化成水——而化学变化则改变了所涉及物质的本质。学习化学变化不仅对化学学生至关重要，也与日常生活息息相关。例如，烹饪涉及许多化学变化。当你烘焙蛋糕时，随着加热，成分发生化学变化，最终形成松软、美味的甜点。鸡蛋中的蛋白质凝固，糖类焦糖化，各种风味发展，这一切都归功于烘烤过程中发生的化学变化。此外，了解化学变化可以帮助个人做出明智的健康和安全决定。例如，知道某些清洁产品会发生化学变化，可以使消费者了解它们的有效性和潜在危险。有些清洁剂混合时会释放有害气体，突显了理解这些产品背后化学原理的重要性。此外，了解化学变化会增强环境意识。光合作用的过程，植物将二氧化碳和水转化为葡萄糖和氧气，是一种维持地球生命的重要化学变化。认识到这一过程强调了保护植物生命和维护健康环境的重要性。总之，研究化学变化在多个领域都是至关重要的，从化学到环境科学以及日常生活。通过掌握化学变化的重要性，我们可以欣赏物质的动态特性以及支配我们世界的复杂过程。无论是观察自行车上的生锈、享受新鲜出炉的蛋糕，还是理解植物在生态系统中的作用，化学变化无处不在，塑造着我们的经历和对宇宙的理解。