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  1. Atoms and Molecules
    by Dr. Osama M. Khaled — published May 30, 2024 — last modified Jun 16, 2024 10:14 AM
    The entire physical world is made up of a relatively few substances, and these exist as atoms and molecules.
    Located in Physics
  2. Elements and Compounds
    by Dr. Osama M. Khaled — published May 30, 2024 — last modified Jul 13, 2024 12:55 PM — filed under: Year 9
    All of the materials and substances that we experience are made up of elements
    Located in Physics / Atoms and Molecules
  3. All of the materials and substances that we experience are made up of 100 of so __________
    by Dr. Osama M. Khaled — published May 30, 2024 — last modified May 30, 2024 08:51 PM Located in Physics / Atoms and Molecules / Elements and Compounds
  4. Choose the right elements
    by Dr. Osama M. Khaled — published May 30, 2024 Located in Physics / Atoms and Molecules / Elements and Compounds
  5. Most substances we deal with daily are
    by Dr. Osama M. Khaled — published May 30, 2024 Located in Physics / Atoms and Molecules / Elements and Compounds
  6. A __________ is a chemical combinations of two or more elements
    by Dr. Osama M. Khaled — published May 30, 2024 Located in Physics / Atoms and Molecules / Elements and Compounds
  7. Add: 9,835 + 692 + 7,275
    by Dr. Osama M. Khaled — published May 27, 2025 — last modified May 27, 2025 10:14 PM Located in Mathematics / … / Adding Whole Numbers / Addition Basics
  8. Math Equation visualisation over a number line
    by Dr. Osama M. Khaled — published Feb 25, 2026 — last modified Feb 25, 2026 02:41 AM
    This tool is a Dynamic Mathematical Path Visualizer designed to bridge the gap between abstract equations and spatial reasoning. It transforms standard ...
    Located in Tools / Mathematics Tools
  9. quiz-search
    by Dr. Osama M. Khaled — published Jul 17, 2024
  10. If two sides and an angle of △ABC are congruent to two sides and angle of △DEF, this makes the two triangles congruent
    by Dr. Osama M. Khaled — published Dec 05, 2025 — last modified Dec 06, 2025 01:37 AM Located in Mathematics / … / Congruent Triangles and Similar Triangles / Use congruence properties to prove that two triangles are congruent
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