graduated cylinder

简明释义

量筒

英英释义

例句

1.When mixing solutions, always pour them into a graduated cylinder for precise measurement.

在混合溶液时，总是将它们倒入一个量筒中，以确保精确测量。

2.The chemistry lab requires students to use a graduated cylinder for all liquid measurements.

化学实验室要求学生在所有液体测量中使用量筒。

3.A graduated cylinder is essential for any scientific experiment involving liquids.

对于任何涉及液体的科学实验，量筒都是必不可少的。

4.To measure the volume of liquid accurately, we used a graduated cylinder.

为了准确测量液体的体积，我们使用了一个量筒。

5.Make sure to read the meniscus at eye level when using a graduated cylinder.

使用量筒时，请确保在眼平视线读取液面。

作文

In the world of science, precision is paramount. One of the most essential tools used in laboratories is the graduated cylinder. A graduated cylinder is a tall, cylindrical container marked with horizontal lines to represent units of measurement, which allows for accurate measurement of liquid volumes. This instrument is crucial for chemists, biologists, and other scientists who need to measure liquids with precision. The design of a graduated cylinder typically features a spout for easy pouring and is made from glass or plastic. Glass graduated cylinders are often preferred due to their resistance to chemical reactions and their ability to provide clear visibility of the liquid inside. On the other hand, plastic graduated cylinders are less fragile and can be used in educational settings where breakage might pose a risk. When using a graduated cylinder, it is important to follow proper techniques to ensure accuracy. First, one must place the cylinder on a flat surface to avoid any tilting that could lead to incorrect measurements. Next, the user should pour the liquid into the cylinder slowly, watching closely as the liquid level rises. It is essential to read the measurement at the bottom of the meniscus, which is the curved surface of the liquid. This technique helps to minimize errors and provides a more accurate reading. Moreover, the graduated cylinder comes in various sizes, typically ranging from 10 milliliters to 2 liters. The choice of size depends on the volume of liquid being measured. For small volumes, a smaller graduated cylinder is ideal, while larger volumes require a bigger one. This versatility makes the graduated cylinder an invaluable tool in scientific research and experiments. In educational settings, students often use graduated cylinders during chemistry labs to conduct experiments that require precise measurements. Understanding how to read a graduated cylinder is a fundamental skill that students must master, as it lays the groundwork for more complex scientific concepts. Through hands-on practice, students learn not only how to measure liquids accurately but also the importance of precision in scientific inquiry. In summary, the graduated cylinder is a vital instrument in the field of science that allows for the accurate measurement of liquid volumes. Its design, usage techniques, and educational significance underscore its importance in both professional laboratories and classrooms. Mastery of the graduated cylinder contributes to a deeper understanding of scientific principles and enhances the reliability of experimental results.

在科学的世界中，精确性至关重要。实验室中使用的最基本工具之一是量筒。量筒是一种高而圆柱形的容器，上面标有水平线以表示测量单位，这使得液体体积的准确测量成为可能。这种仪器对于需要精确测量液体的化学家、生物学家和其他科学家来说至关重要。量筒的设计通常具有一个用于轻松倒出的喷嘴，由玻璃或塑料制成。由于耐化学反应和能够清晰地看到内部液体，玻璃量筒通常更受青睐。另一方面，塑料量筒不易破碎，可以在教育环境中使用，以避免破损带来的风险。在使用量筒时，遵循正确的技巧以确保准确性非常重要。首先，必须将量筒放在平坦的表面上，以避免倾斜导致测量不准确。接下来，用户应该缓慢地将液体倒入量筒，密切注意液面上升。当阅读测量值时，必须在液体的弯曲表面底部读取，这被称为液体的凹液面。这个技巧有助于减少误差，并提供更准确的读数。此外，量筒有多种尺寸，通常范围从10毫升到2升。选择的尺寸取决于所测量液体的体积。对于小体积，较小的量筒是理想的，而较大的体积则需要更大的量筒。这种多功能性使得量筒成为科学研究和实验中不可或缺的工具。在教育环境中，学生们常常在化学实验室中使用量筒进行需要精确测量的实验。理解如何读取量筒是学生必须掌握的基本技能，因为这为更复杂的科学概念奠定了基础。通过实践操作，学生不仅学习如何准确测量液体，还理解了精确性在科学探究中的重要性。总之，量筒是科学领域中一种重要的仪器，能够准确测量液体体积。它的设计、使用技巧和教育意义突显了它在专业实验室和教室中的重要性。掌握量筒有助于深入理解科学原理，并增强实验结果的可靠性。