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Hull, Michael M.; Nakayama, Shizuka; Tosa, Sachiko – Physics Teacher, 2023
Newton's laws are a ubiquitous topic in introductory physics instruction. One common problem involves asking what will happen if you stick your finger into a cup of water sitting on a scale. A way to solve the problem would be to first recognize that the water exerts a buoyant force upward on the finger, which students can recognize as being the…
Descriptors: Science Instruction, Physics, Scientific Principles, Concept Formation
Shen, Jian; Deng, Shubo; Wu, Jing – Journal of Chemical Education, 2022
The undergraduates in the major of Environmental Science and Environmental Engineering frequently ignored the importance of identifying pollution sources for water environment monitoring and knew little about the techniques of identifying pollution sources. Thus, a laboratory experiment which focused on pollution sources identification in a water…
Descriptors: College Science, Undergraduate Students, Water Pollution, Science Laboratories
Kim, Kihyang; Paik, Seoung-Hey – Journal of Chemical Education, 2021
Water electrolysis, a well-known and simple experiment, confirms that a water molecule comprises hydrogen and oxygen atoms. In this experiment, hydroxide or hydrogen ions generated from each electrode were identified using an indicator based on the assumption that electrodes, electrolytes, and indicators do not participate in the water…
Descriptors: Water, Science Instruction, Chemistry, Science Experiments
Preston, Christine – Teaching Science, 2021
Water is a special substance. Not only do humans rely on water for survival, but it is also fascinating to play with and makes a great topic to investigate. Many simple investigations can be done with water, at home or at school, to guide children's science learning. This article describes a sequence of online learning experiences that were set…
Descriptors: Water, Online Courses, COVID-19, Pandemics
Kajiya, Daisuke – Journal of Chemical Education, 2021
This paper reports a demonstration of a 90 min on-demand class where a chemical experiment is performed to educate nonscience majors on surfactants. First-year undergraduate students perform the water ball in a water bottle experiment at home and learn about the structure and properties of organic compounds in the demonstration. The experiment is…
Descriptors: Science Experiments, Science Instruction, Nonmajors, Undergraduate Students
Kim, Kihyang; Paik, Seoung-Hey; Rhee, Choong K. – Journal of Chemical Education, 2021
Water electrolysis is used to teach important and fundamental concepts in chemistry. In practical water electrolysis experiments, it is difficult to achieve the ideal 2:1 ratio of hydrogen to oxygen. This work demonstrates an experimental setup comprising multiple water electrolysis cells connected in series to simultaneously visualize the effects…
Descriptors: Chemistry, Water, Demonstrations (Educational), Science Instruction
Hughes, Stephen; Wegener, Margaret; Gurung, Som – Physics Education, 2022
In this paper, a simple method is described for visually demonstrating that the wavelength of light reduces when entering a medium of higher refractive index. When a violet laser (405 nm) is reflected off the surface of a Blu-ray disc (track spacing 320 nm) diffraction cannot occur since the wavelength is greater than the track spacing. However,…
Descriptors: Science Instruction, Physics, Light, Lasers
Lindén, Johan – Physics Education, 2020
A glass of water covered with a disk with a hole in it can be turned upside down without spilling the water in the glass, provided the hole is small enough and the disk is pressed against the rim of the glass. A quasistatic numerical simulation based on hydrostatic pressure and surface tension of water was used calculate the critical hole diameter…
Descriptors: Physics, Science Instruction, Water, Teaching Methods
Hughes, Stephen – Physics Education, 2022
Archimedes' principle is one of the foundation subjects in physics. Normally the principle is exemplified by reference to floating boats. However, Archimedes' principle also applies to objects embedded in waterlogged ground, which can lead to the surprising result of an object weighing several tons being lifted. A practical example is presented of…
Descriptors: Physics, Science Instruction, Teaching Methods, Scientific Principles
Cross, Rod – Physics Education, 2020
A standard physics experiment for students is to measure the terminal velocity of an object in air or in glycerine. A more difficult challenge is to measure the terminal velocity in water since the depth of the water needs to be large or the object needs to be dropped in the water at a speed close to its terminal velocity. Results obtained by…
Descriptors: Water, Physics, Science Instruction, Science Experiments
Chen, Yu; Kim, Hee Ra; Ahn, Yu Jin; Kim, Jung Bog – Physics Teacher, 2022
The laser pointer has been widely used to demonstrate some simple optics phenomena, like reflection, refraction, total reflection, and diffraction. However, the rays of laser light cannot be seen in the air because the scattered light is too weak. Many physics teachers use milk or smoke to visualize rays of laser light in physics labs, but it is…
Descriptors: Science Experiments, Physics, Optics, Light
Ivanov, Dragia; Nikolov, Stefan – Physics Education, 2020
The anomalous thermal expansion of water in the 0 °C-4 °C range is extremely important to life on Earth, but it is normally not presented experimentally in educational settings. This paper presents a simple experiment to explore the anomalous thermal expansion of water in the 0 °C-4 °C range and the heat exchange processes in natural bodies of…
Descriptors: Water, Thermodynamics, Science Experiments, Heat
Marranghello, Guilherme Frederico; Lucchese, Márcia Maria; da Rocha, Fábio Saraiva – Physics Teacher, 2022
Water rockets can be used in a variety of ways, from schools to planetariums, with very young kids or adults. We propose here simple forms to work with water rockets, going one step further than a simple launch. A smartphone can be used to film the launch and analyze its motion with video analysis or it can even be attached to the rocket, using…
Descriptors: Physics, Video Technology, Science Instruction, Water
Levine, Zachary H. – Physics Teacher, 2021
Frozen peas and carrots are commonly available in grocery stores in the United States. The carrots are cut into cubes roughly 8 mm on a side, while the peas are roughly spherical with a diameter of about 6 mm. They are prepared together in water that is brought to a boil. The peas and carrots, which are initially mixed together, separate as the…
Descriptors: Science Instruction, Food, Science Experiments, Physics
Martins, J. E. M. Perea – Physics Education, 2022
This work presents the design of an inexpensive electronic system to measure water temperature and generate an experimental data set used to verify the fitting between experimental and theoretical curves of a water-cooling process. The cooling constant is computed with three different theoretical methods to check their efficiency and this approach…
Descriptors: Water, Science Experiments, Measurement Techniques, Computer Uses in Education