Go Math Science

by Dr. Osama M. Khaled — published May 16, 2026 — last modified May 16, 2026 10:23 PM — filed under: Year 7, Year 8

The area of a polygon is the measure of the amount of surface it encloses. Area is measured in square units, such as square inches or square centimeters

Located in Mathematics / Geometry / Perimeters and Areas of Polygons

Find the circumference of a circle

by Dr. Osama M. Khaled — published May 17, 2026 — last modified May 17, 2026 03:53 AM — filed under: Year 8

Since early history, mathematicians have known that the ratio of the distance around a circle (the circumference) divided by the length of its diameter is ...

Located in Mathematics / Geometry / Circles

Find the percent of increase or decrease

by Dr. Osama M. Khaled — published Dec 24, 2024 — last modified May 12, 2025 06:16 AM — filed under: Year 7, Year 8, Year 9

Percents can be used to describe how a quantity has changed

Located in Mathematics / … / Percent / Applications of Percent

Find the volume of rectangular solids, prisms, and pyramids

by Dr. Osama M. Khaled — published May 18, 2026 — last modified May 18, 2026 08:57 PM — filed under: Year 8, Year 9

The volume of a three-dimensional figure is a measure of its capacity

Located in Mathematics / Geometry / Volume

Human Reproductive Anatomy

by Dr. Osama M. Khaled — published Jun 18, 2026 — last modified Jun 18, 2026 12:32 AM — filed under: Year 8

The quiz covers male structures (scrotum, seminiferous tubules, epididymis, sperm duct, prostate, urethra) and female structures (vulva, vagina, cervix, ...

Located in Biology / Reproduction

Identify corresponding parts of congruent triangles

by Dr. Osama M. Khaled — published Nov 20, 2025 — last modified Nov 27, 2025 08:53 AM — filed under: Year 8

Simply put, two geometric figures are congruent if they have the same shape and size.

Located in Mathematics / Geometry / Congruent Triangles and Similar Triangles

Inside Plasma Membrane

by Dr. Osama M. Khaled — published Jul 17, 2022 — last modified Jul 13, 2024 10:18 PM — filed under: Year 8

Cytoplasm and Nucleoplasm

Located in Biology / Cell Structure

Mathematical Operations and Foundational Constraints

by Dr. Osama M. Khaled — published May 23, 2026 — last modified May 23, 2026 08:55 AM — filed under: Year 7, Year 8

Negative Numbers and Division by Zero

Located in Mathematics / Calculus / From Arithmetic to Algebra

Menstrual Cycle

by Dr. Osama M. Khaled — published Jun 18, 2026 — last modified Jun 18, 2026 03:09 AM — filed under: Year 8, Year 11

This quiz covers the four key hormones (FSH, estradiol, LH, progesterone), the ovarian vs. uterine cycle distinction (with a hormone-timeline diagram), ...

Located in Biology / Reproduction

Mitochondria and Energy Production

by Dr. Osama M. Khaled — published Jun 15, 2026 — last modified Jun 15, 2026 08:03 AM — filed under: Year 8, Year 11

This quiz covers the powerhouse of the cell: ATP production, the roles of cristae and matrix, the outer and inner membranes, fat droplet storage, and why ...

Located in Biology / Cell Structure

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