8th Grade Science Quizzes , Questions & Answers

Recent Science Quizzes

This assessment focuses on ecosystem hierarchy and energy flow, evaluating your understanding of ecological concepts such as communities, energy transfer, and trophic levels. It is relevant for learners seeking to grasp how...

Questions: 8 | Attempts: 11 | Last updated: Oct 6, 2026

Sample Question
Which term describes all the different populations of plants and animals living and interacting in a particular environment?

Ecosystem

Community

Population

Organism

Interaction with Environment Science Quiz

This quiz focuses on the interaction between human activities and the environment. Key concepts include the effects of deforestation, water waste, and eco-friendly practices. Understanding these topics is essential for...

Questions: 8 | Attempts: 11 | Last updated: Oct 6, 2026

Sample Question
Which of the following best explains how deforestation contributes to climate change?

Trees release carbon dioxide during photosynthesis, increasing greenhouse gases

Fewer trees mean less carbon dioxide is absorbed, increasing atmospheric CO2

Deforestation increases water consumption, depleting freshwater supplies

Removing trees causes soil to become more acidic, harming ecosystems

Acids, Metals & Indicators in Chemistry

This assessment focuses on the interactions between acids, metals, and indicators in chemistry. It evaluates your understanding of key concepts such as acid-metal reactions, gas identification, and pH indicators. Mastering these...

Questions: 8 | Attempts: 11 | Last updated: Oct 6, 2026

Sample Question
What is the general word equation when an acid reacts with a metal?

Acid + Metal → Oxide + Water

Acid + Metal → Salt + Hydrogen Gas

Acid + Metal → Base + Carbon Dioxide

Acid + Metal → Salt + Oxygen Gas

Acids, Alkalis and the pH Scale

This assessment focuses on the properties of acids, alkalis, and the pH scale. It evaluates your understanding of key concepts such as pH levels, chemical reactions between acids and bases, and the identification of laboratory...

Questions: 8 | Attempts: 12 | Last updated: Oct 6, 2026

Sample Question
A solution has a pH of 2. Which of the following best describes this solution?

Strongly alkaline

Weakly acidic

Strongly acidic

Neutral

Chemical Changes in Science

This assessment focuses on chemical changes in science, evaluating your understanding of combustion, oxidation, and electrolysis. Key concepts include thermal decomposition and neutralization reactions, which are vital for...

Questions: 8 | Attempts: 10 | Last updated: Oct 6, 2026

Sample Question
Which of the following correctly describes thermal decomposition?

A substance combines with oxygen using heat

A substance is broken down into two or more simpler substances when heated, without oxygen

A substance reacts with water to form new products

A substance is coated with a thin layer of metal

Chemical Changes Science Quiz

This assessment focuses on chemical changes and reactions, evaluating your understanding of key concepts such as reactants, products, and the conservation of mass. It's relevant for learners looking to solidify their knowledge in...

Questions: 8 | Attempts: 13 | Last updated: Oct 6, 2026

Sample Question
Which of the following BEST describes a chemical change?

A change in which no new substance is formed

A change in which a new substance is formed

A change that can always be easily reversed

A change that only involves state changes

Atomic Models & Early Chemistry

This assessment focuses on atomic models and early chemistry, evaluating your understanding of key concepts such as Dalton's atomic theory, the Law of Conservation of Mass, and the significance of isotopes. It is relevant for...

Questions: 8 | Attempts: 10 | Last updated: Oct 5, 2026

Sample Question
Which ancient philosopher preserved atomic theory during the Middle Ages by publishing the poem 'De Rerum Natura' in 50 BCE?

Democritus

Lucretius

Plato

Aristotle

Science Nutrition and Digestion Quiz

This quiz focuses on the essential concepts of nutrition and digestion, evaluating your understanding of nutrients, their roles, and the digestion process. It's relevant for anyone looking to enhance their knowledge of how food...

Questions: 8 | Attempts: 11 | Last updated: Oct 4, 2026

Sample Question
What is a nutrient?

A substance that organisms need to stay healthy, grow, and survive

A type of chemical used in food preservation

A liquid produced in the mouth to help digestion

A substance that speeds up chemical reactions

Periodic Table Trends and Properties

This assessment focuses on understanding periodic table trends and properties, including atomic radius, electronegativity, and ionization energy. It evaluates your grasp of how these properties change across periods and groups,...

Questions: 8 | Attempts: 11 | Last updated: Oct 3, 2026

Sample Question
Which of the following correctly describes the trend in atomic radius across a period from left to right?

Atomic radius increases because more protons are added

Atomic radius decreases because more protons pull electrons closer to the nucleus

Atomic radius stays the same across a period

Atomic radius increases because more energy levels are added

Particulate Nature of Matter

This assessment explores the particulate nature of matter, focusing on the arrangement and movement of particles in solids, liquids, and gases. Key concepts include the properties of different states of matter, diffusion, and...

Questions: 8 | Attempts: 25 | Last updated: Sep 28, 2026

Sample Question
Which of the following best describes the arrangement of particles in a solid?

Far apart and arranged in a disorderly manner

Closely packed and arranged in an orderly manner

Closely packed but arranged in a disorderly manner

Far apart and arranged in an orderly manner

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