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Grade 8 Quizzes, Questions & Answers

Recent Grade 8 Quizzes

The Great Resets: Understanding Mass Extinction Events

Questions: 20 | Attempts: 12 | Last updated: Mar 3, 2026

Sample Question
What is the general definition of a mass extinction?

A widespread and rapid decrease in the biodiversity on Earth

When one single animal species dies out

When a volcano erupts in one city

When animals go into hibernation

A period when the sun stops shining

Survival of the Fittest: Natural Selection Explained

Questions: 20 | Attempts: 243 | Last updated: Mar 3, 2026

Sample Question
Who is the scientist primarily credited with proposing the theory of natural selection after visiting the Galapagos Islands?

Charles Darwin

Jean-Baptiste Lamarck

Gregor Mendel

Albert Einstein

Isaac Newton

The Rosetta Stone: The Genetic Code Chart

Questions: 20 | Attempts: 90 | Last updated: Mar 2, 2026

Sample Question
What is the main purpose of the genetic code chart used by scientists?

To translate mRNA codons into specific amino acids

To count the number of cells

To measure the speed of DNA

To find the weight of a nucleus

To see the color of a gene

System Error: Lysosomal Storage Diseases

Questions: 20 | Attempts: 14 | Last updated: Feb 23, 2026

Sample Question
What is the primary cause of lysosomal storage diseases?

A missing or malfunctioning enzyme

Too much oxygen in the cell

A lack of sunlight

Having too many lysosomes

The cell wall being too thick

Graceful Exits: Apoptosis Explained

Questions: 20 | Attempts: 40 | Last updated: Mar 2, 2026

Sample Question
Which organelle is often referred to as the "suicide bag" of the cell?

Lysosome

Mitochondria

Ribosome

Golgi Apparatus

Nucleus

Packaging and Shipping: Vesicle Transport to Golgi

Questions: 20 | Attempts: 53 | Last updated: Mar 2, 2026

Sample Question
What occurs during the process of "budding" at the Endoplasmic Reticulum (ER)?

The nucleus divides

A section of membrane pinches off to form a sac

The cell wall thickens

The mitochondria produce sugar

Ribosomes are destroyed

Living on Light: Photosynthesis Process Explained

Questions: 20 | Attempts: 24 | Last updated: Mar 2, 2026

Sample Question
Which of the following is the best definition of the photosynthesis process?

Breaking down sugar to release energy

Converting light energy into chemical energy stored in glucose

Absorbing water through the roots

Releasing carbon dioxide into the air

Turning minerals into vitamins

The Breath of Life: Cellular Respiration Explained

Questions: 20 | Attempts: 35 | Last updated: Mar 2, 2026

Sample Question
What is the primary purpose of cellular respiration in a living organism?

To make glucose

To release energy (ATP) from food

To absorb sunlight

To produce oxygen

To build cell walls

Cellular Bridges: Plasmodesmata Explained

Questions: 20 | Attempts: 15 | Last updated: Mar 2, 2026

Sample Question
What are plasmodesmata in a plant cell?

Large storage sacs

Microscopic channels crossing the cell walls

Solar energy panels

Waste disposal units

Small hooks that grab water

The Cellular Factory: Endomembrane System Explained

Questions: 20 | Attempts: 66 | Last updated: Mar 2, 2026

Sample Question
What is the main purpose of the endomembrane system in a eukaryotic cell?

To produce energy

To capture sunlight

To modify, package, and transport lipids and proteins

To store genetic code

To provide rigid structure

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