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  1. Database Actors in the Scene
    by Dr. Osama M. Khaled — published Aug 31, 2025 — last modified Oct 18, 2025 12:14 PM — filed under: Year 10, Year 11, Year 12
    We identify the people whose jobs involve the day-to-day use of a large database but no actively interested in the content of the database.
    Located in Computing / Database / Introduction
  2. Advantages of using a DMBS approach
    by Dr. Osama M. Khaled — published Sep 04, 2025 — last modified Oct 18, 2025 12:15 PM — filed under: Year 10, Year 11, Year 12
    Some advantages that a good DMBS can provide to a software solution
    Located in Computing / Database / Introduction
  3. Cell Structure Definitions
    by Dr. Osama M. Khaled — published May 17, 2022 — last modified Jul 13, 2024 10:46 PM — filed under: Year 10
    Play hangman and get to know more definitions related to cell structure topic
    Located in Biology / Cell Structure
  4. Microscopes
    by Dr. Osama M. Khaled — published May 12, 2022 — last modified Jul 13, 2024 10:46 PM — filed under: Year 10
    A microscope is a laboratory instrument scientists use to examine objects that cannot be seen by naked eyes.
    Located in Biology / Cell Structure
    Microscopes
  5. Cells
    by Dr. Osama M. Khaled — published May 23, 2022 — last modified Jul 13, 2024 10:45 PM — filed under: Year 10
    Cells and cell theory
    Located in Biology / Cell Structure
    Cells
  6. Measurements definitions
    by Dr. Osama M. Khaled — published May 31, 2022 — last modified Jul 13, 2024 10:42 PM — filed under: Year 10
    Important definitions when studying measurements in chemistry
    Located in Chemistry / Measurements
  7. Expressing numbers
    by Dr. Osama M. Khaled — published May 31, 2022 — last modified Jul 13, 2024 10:42 PM — filed under: Year 10
    Quantities have two parts: the number and the unit. The number tells “how many.” It is important to be able to express numbers properly so that the quantities ...
    Located in Chemistry / Measurements
  8. Expressing Units
    by Dr. Osama M. Khaled — published Dec 26, 2023 — last modified Jul 13, 2024 01:09 PM — filed under: Year 10
    Learn the units that go with various quantities, express units using their abbreviations, and make new units by combining numerical prefixes with units.
    Located in Chemistry / Measurements
  9. Significat Figures
    by Dr. Osama M. Khaled — published May 21, 2026 — last modified May 21, 2026 08:37 PM — filed under: Year 10
    This quiz focuses on identifying significant figures, applying rounding rules, performing calculations using significant figure conventions, interpreting ...
    Located in Chemistry / Measurements
  10. Converting Units
    by Dr. Osama M. Khaled — published May 21, 2026 — last modified May 21, 2026 10:08 PM — filed under: Year 10
    Dimensional analysis, SI units, metric prefixes, conversion factors, scientific notation, temperature conversions, density-related measurements, and important ...
    Located in Chemistry / Measurements
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