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The Real Reason Why ATP Hydrolysis Is Spontaneous at pH > 7: It's (Mostly) the Proton Concentration!
Peer reviewed
Direct linkSilverstein, Todd P. – Biochemistry and Molecular Biology Education, 2023
Common wisdom holds that ATP hydrolysis is spontaneous because of the weakness of its phosphoanhydride bonds, electrostatic repulsion within the polyanionic ATP[superscript 4]-molecule, and resonance stabilization of the inorganic phosphate and ADP products. By examining the pH-dependence of the hydrolysis Gibbs free energy, we show that in fact,…
Descriptors: Biochemistry, Molecular Biology, Science Education, Scientific Concepts
Lydia Horne; Amanda Manzanares; Nicholas Babin; Emily A. Royse; Lee Arakawa; Eunice Blavascunas; Lisa Doner; Daniel Druckenbrod; Ennea Fairchild; Meghann Jarchow; Barry R. Muchnick; Prajjwal Panday; Denielle Perry; Rebecca Thomas; Anne Toomey; Brian H. Tucker; Camille Washington-Ottombre; Shirley Vincent; Steven W. Anderson; Chelsie Romulo – Journal of Geoscience Education, 2024
Interdisciplinary environmental and sustainability (IES) programs are different from other fields because they focus on a complex integration of humanities, social, and natural sciences concepts centered on the interactions of coupled human and natural systems. The interdisciplinary nature of IES programs does not lend itself to traditional…
Descriptors: Interdisciplinary Approach, Environmental Education, Sustainability, Higher Education
Yunhua Li; Weizhong Liao; Cuixue Chen; Meiling Ye; Alexander Luis Imbault – Journal of Chemical Education, 2023
The electrolysis of water to produce hydrogen is a critical step in many green chemistry processes. The key to the efficiency of water electrolysis is the synthesis of an appropriate electrocatalyst. Three-dimensional (3D) printing is an increasingly important part of many industrial processes. In this study, we propose an efficient laboratory…
Descriptors: Printing, Computer Peripherals, Educational Technology, Chemistry
Jarrett, Lorna; Takacs, George – Environmental Education Research, 2020
We present ideas about concepts underlying climate change, held by students in years 9 and 10. Misconceptions about climate change are common among students, and may be due to misconceptions about underlying concepts. To investigate this, we developed the Climate Change Concept Inventory (CCCI), and trialed it with 229 students; corroborating…
Descriptors: Climate, Change, Scientific Concepts, Student Attitudes
Schmidt-Rohr, Klaus – Journal of Chemical Education, 2018
Batteries are valued as devices that store chemical energy and convert it into electrical energy. Unfortunately, the standard description of electrochemistry does not explain specifically where or how the energy is stored in a battery; explanations just in terms of electron transfer are easily shown to be at odds with experimental observations.…
Descriptors: Chemistry, Energy, Science Instruction, Scientific Concepts
Silvia-Jessica Mostacedo-Marasovic; Cory T. Forbes – International Journal of Sustainability in Higher Education, 2024
Purpose: A faculty development program (FDP) introduced postsecondary instructors to a module focused on the food-energy-water (FEW) nexus, a socio-hydrologic issue (SHI) and a sustainability challenge. This study aims to examine factors influencing faculty interest in adopting the instructional resources and faculty experience with the FDP,…
Descriptors: Faculty Development, Learning Modules, Program Evaluation, Program Attitudes
Rayner, John – Physics Teacher, 2017
This paper describes an experimental investigation of the skin depth effect for electromagnetic waves in salt water using a cell phone that is immersed to a critical depth where it no longer responds when called. We show that this critical depth is directly proportional to the theoretical skin depth for a range of salt concentrations.
Descriptors: Science Experiments, Handheld Devices, Telecommunications, Magnets
Levine, Zachary H. – Physics Teacher, 2018
An attempt to calibrate a conventional oven led to making a measurement of a thermophysical property of water using items found in the author's home. Specifically, the ratio of the energy required to heat water from the melting point to boiling to the energy required to completely boil away the water is found to be 5.7. This may be compared to the…
Descriptors: Thermodynamics, Heat, Water, Science Education
Download full textFuchs, Hans U.; Corni, Federico; Pahl, Angelika – Education Sciences, 2021
We experience (perceive, act upon and react to, and conceptualize) dynamical processes in nature as agentive. Expressed differently, we experience events as resulting from activities and interactions of "Forces of Nature" (such as wind, light, heat, fluids, electricity, substances, and motion) that are conceived of as powerful agents…
Descriptors: Scientific Concepts, Concept Formation, Drama, Simulation
Bagnoli, Franco; Guarino, Alessio; Pacini, Giovanna – Physics Education, 2019
In this paper we describe the results of some experiments about using surprising physics demonstrations, presented as magical phenomena followed by scientific explanations, for introducing physics topics in several teaching contexts. All the demonstrations have been designed to be implemented with easy to get and cheap materials, so that students…
Descriptors: Physics, Science Instruction, Science Experiments, Demonstrations (Educational)
Jurkiewicz, Melissa A.; Kirn, Adam; Crowther, David – Science and Children, 2019
Interactions with forces and energy can range from a toddler dropping toys repeatedly for someone else to pick up to a group of fifth graders playing soccer at recess. In addition, students may have observed the power of water to move physical objects by seeing news footage of rising floodwaters, experimenting with a garden hose, or spending a day…
Descriptors: Grade 3, Grade 4, Grade 5, Water
Marshall, Rick – Physics Education, 2015
Many icebergs are vulnerable to capsizing. In doing so the gravitational potential energy of the ice is increased, while that of the displaced sea water is decreased. Applying the principle of the conservation of energy shows that by capsizing, there is also a net transfer of energy to the surrounding sea water. This will be a maximum for a…
Descriptors: Science Instruction, Energy, Physics, Scientific Concepts
Casler-Failing, Shelli L.; Stevenson, Alma D.; King Miller, Beverly A. – Current Issues in Middle Level Education, 2021
This manuscript shares the implementation of an after-school literacy in STEM (science, technology, engineering, and mathematics) program designed for middle grades students to increase their interest in science and mathematics learning. This program was conducted at our local Boys and Girls Club facilities where students learned about four…
Descriptors: STEM Education, After School Programs, Culturally Relevant Education, Literacy Education
Slisko, Josip; García-Molina, Rafael; Abril, Isabel – Physics Teacher, 2014
Authors of physics textbooks frequently use the deflection of a thin, vertically falling water jet by a charged balloon, comb, or rod as a visually appealing and conceptually relevant example of electrostatic attraction. Nevertheless, no attempts are made to explore whether these charged bodies could cause visible deformation of a horizontal water…
Descriptors: Science Instruction, Physics, Scientific Concepts, Energy
Pallant, Amy; Pryputniewicz, Sarah; Lee, Hee-Sun – Science Teacher, 2017
This article describes a five-day online energy module, developed by the Concord Consortium (an educational research and development organization) in which students compare the effects of various energy sources on air quality, water quality, and land use. The module's interactive models explore hydraulic fracturing, real-world data on energy…
Descriptors: Energy, Scientific Concepts, Science Education, Units of Study
