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Showing 16 to 30 of 244 results Save | Export
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Chia, Matthew C.; Sweeney, Christina M.; Odom, Teri W. – Journal of Chemical Education, 2011
General chemistry introduces principles such as acid-base chemistry, mixing, and precipitation that are usually demonstrated in bulk solutions. In this laboratory experiment, we describe how chemical reactions can be performed in a microfluidic channel to show advanced concepts such as laminar fluid flow and controlled precipitation. Three sets of…
Descriptors: Undergraduate Students, Chemistry, Laboratory Experiments, Scientific Concepts
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Ashbrook, Peggy – Science and Children, 2015
We all experience firsthand many of the phenomena caused by Earth's Place in the Universe (Next Generation Science Standard 5-ESS1; NGSS Lead States 2013) and the relative motion of the Earth, Sun, and Moon. Young children can investigate phenomena such as changes in times of sunrise and sunset (number of daylight hours), Moon phases, seasonal…
Descriptors: Science Instruction, Earth Science, Standards, Astronomy
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Graves, Adam; Jones, Leslie; Kaplan, Frances F. – Art Therapy: Journal of the American Art Therapy Association, 2013
This pilot study examines an aspect of construct validity of the Draw-a-Person-in-the-Rain (DAPR) assessment utilizing a sample ("N" = 58) of third-grade public school children from three geographic regions of the United States (Great Plains, Rocky Mountain, and Pacific Northwest) that differ in climate and frequency of precipitation. A…
Descriptors: Art Therapy, Measures (Individuals), Construct Validity, Grade 3
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Ramborun, V.; Facknath, S.; Lalljee, B. – Journal of Agricultural Education and Extension, 2020
Purpose: Small holder farmers are highly vulnerable to changes in climate, as they live on a marginal income, and the crops they depend upon are highly affected by climate. This paper seeks to investigate the impact of climate change on farmers' productivity and their adaptive responses to these impacts. Methodology: One hundred and fifteen…
Descriptors: Sustainable Development, Agricultural Occupations, Agricultural Laborers, Attitudes
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Bogusevschi, Diana; Muntean, Cristina; Muntean, Gabriel-Miro – Journal of Computers in Mathematics and Science Teaching, 2020
A common problem in many schools is the lack of equipment and materials in their science laboratories due to both limited budget available to the school and high maintenance cost of the lab. The latest technological advancements provide great opportunities for schools to go over the budget and cost issues by using 3D virtual learning environments…
Descriptors: Physics, Secondary School Science, Educational Technology, Computer Simulation
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Maines, Laina L.; Bruch, Martha D. – Journal of Chemical Education, 2012
General chemistry students often have difficulty writing balanced equations and performing stoichiometry calculations for precipitation reactions, in part because of difficulty understanding the symbolic notation used to represent chemical reactions. We have developed a problem-based experiment to improve student learning of these concepts, and…
Descriptors: Chemistry, Science Instruction, Problem Based Learning, Science Experiments
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Garcia, Jennifer; Schultz, Linda D. – Journal of Chemical Education, 2016
The classic technique for sulfate analysis in an undergraduate quantitative analysis lab involves precipitation as the barium salt with barium chloride, collection of the precipitate by gravity filtration using ashless filter paper, and removal of the filter paper by charring over a Bunsen burner. The entire process is time-consuming, hazardous,…
Descriptors: Science Instruction, College Science, Undergraduate Study, Science Experiments
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Abu-Thabit, Nedal Y. – Journal of Chemical Education, 2016
Electrically conducting polymers are one of the promising alternative materials for technological applications in many interdisciplinary areas, including chemistry, material sciences, and engineering. This experiment was designed for providing undergraduate students with a quick and practical approach for preparation of a polyaniline-conducting…
Descriptors: Chemistry, Science Instruction, Undergraduate Study, College Science
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Karunanayake, Akila G.; Dewage, Narada Bombuwala; Todd, Olivia Adele; Essandoh, Matthew; Anderson, Renel; Mlsna, Todd; Mlsna, Deb – Journal of Chemical Education, 2016
Adsorption studies of salicylic acid (SA) and 4-nitroaniline (4NA) from aqueous solutions were performed with magnetic biochar (MBC) in order to train students in analytical techniques such as standard calibration curves, UV-vis spectrophotometry, and chemical separations within the context of wastewater purification. Analysis of samples purified…
Descriptors: Undergraduate Students, Science Education, Chemistry, Scientific Concepts
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Harris, C.; Gaster, C.; Gelabert, M. C. – Journal of Chemical Education, 2019
Synthesis and characterization of nanomaterials yields opportunities for instruction of related topics in solution chemistry and materials science, as well as spectroscopy connecting to band theory, the "particle in a box" quantum mechanical model, and thermodynamics. In collaboration with an undergraduate research assistant, we have…
Descriptors: Science Instruction, Science Experiments, Chemistry, Thermodynamics
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Szeberenyi, Jozsef – Biochemistry and Molecular Biology Education, 2010
Terms to be familiar with before you start to solve the test: genetic code, translation, synthetic polynucleotide, leucine, serine, filter precipitation, radioactivity measurement, template, mRNA, tRNA, rRNA, aminoacyl-tRNA synthesis, ribosomes, degeneration of the code, wobble, initiation, and elongation of protein synthesis, initiation codon.…
Descriptors: Genetics, Problem Solving, Molecular Biology, Laboratory Experiments
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Zhang, Nianhui; Yu, Dong; Zhu, Xiaofeng – Biochemistry and Molecular Biology Education, 2018
The practice of RNA isolation in undergraduate experimental courses is rare because of the existence of robust, ubiquitous and stable ribonucleases. We reported here modifications to our original protocol for RNA isolation from plant tissues, including the recovery of nucleic acids by ethanol precipitation at 0 degrees C for 10 min and the…
Descriptors: Genetics, Undergraduate Study, Science Experiments, College Science
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Davis, Eric; Cheung, Ken; Pauls, Steve; Dick, Jonathan; Roth, Elijah; Zalewski, Nicole; Veldhuizen, Christopher; Coeler, Joel – Journal of Chemical Education, 2015
In this laboratory experiment, lower- and upper-division students dissolved bismuth subsalicylate tablets in acid and precipitated the resultant Bi[superscript 3+] in solution with sodium phosphate for a gravimetric determination of bismuth subsalicylate in the tablets. With a labeled concentration of 262 mg/tablet, the combined data from three…
Descriptors: Undergraduate Students, Laboratory Experiments, Statistical Analysis, Stoichiometry
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Agrawal, D. C. – Physics Teacher, 2013
The atmospheric recycling of water is a very important phenomenon on the globe because it not only refreshes the water but it also redistributes it over land and oceans/rivers/lakes throughout the globe. This is made possible by the solar energy intercepted by the Earth. The half of the globe facing the Sun, on the average, intercepts 1.74 ×…
Descriptors: Weather, Water, Climate, Energy
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Hazen, Jeffery L.; Cleary, David A. – Journal of Chemical Education, 2014
Precipitation of barium phosphate from aqueous solutions of a barium salt and a phosphate salt forms the basis for a number of conclusions drawn in general chemistry. For example, the formation of a solid white precipitate is offered as evidence that barium phosphate is insoluble. Furthermore, analysis of the supernatant is used to illustrate the…
Descriptors: Science Instruction, Chemistry, Science Curriculum, Scientific Principles
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