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  1. 1 day ago · Understanding catalysts allows scientists to design more sustainable chemical processes, reducing energy and waste. This field is key to advancing green chemistry and developing solutions to global energy and environmental challenges. With this in mind, let’s engage with a terrific teaching resource!

  2. 4 days ago · Miller-Urey experiment, experimental simulation conducted in 1953 that attempted to replicate the conditions of Earth’s early atmosphere and oceans to test whether organic molecules could be created abiogenically, that is, formed from chemical reactions occurring between inorganic molecules thought.

  3. 1 day ago · Determining the Values of Graduated Markings Measurement Practice - Volume, Length, Mass Online Measurement Practice Using Scientific Notation Scientific Notation (PPT.) Scientific Notation Practice Problems Scientific Notation - Additional Practice Conversions - Self-Assessment Sheet Navigating the Metric System (PPT.)

  4. 4 days ago · Question paper (Modified A3 36pt) (Foundation): Paper 1 - June 2023 New. Published 12 Jul 2024 | PDF | 1.9 MB. Examiner report (Higher): Paper 1 - June 2023 New. Published 12 Jul 2024 | PDF | 158 KB. Question paper (Modified A4 18pt) (Foundation): Paper 2 - June 2023 New. Published 12 Jul 2024 | PDF | 1.2 MB.

  5. 4 days ago · Sublimation, in physics, conversion of a substance from the solid to the gaseous state without its becoming liquid. An example is the vaporization of frozen carbon dioxide (dry ice) at ordinary atmospheric pressure and temperature. The phenomenon is the result of vapour pressure and temperature.

    • The Editors of Encyclopaedia Britannica
  6. 3 days ago · Solvent, substance, ordinarily a liquid, in which other materials dissolve to form a solution. Polar solvents (e.g., water) favor formation of ions; nonpolar ones (e.g., hydrocarbons) do not. Solvents may be predominantly acidic, predominantly basic, amphoteric (both), or aprotic (neither).

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  8. 5 days ago · I often found myself trying to persuade skeptical peers of the long-term benefits of open science. I argued that the increased visibility and scrutiny, far from being detrimental, actually strengthen our work, and the research community as a whole.

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