8th Grade Science Midterm Review Quiz

Science

7th Grade,
8th Grade,
9th Grade

NGSS

Reviewed by Editorial Team

The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.

Learn about Our Editorial Process

| By Thames

Thames

Community Contributor

Quizzes Created: 7682 | Total Attempts: 9,547,133

| Attempts: 26 | Questions: 16 | Updated: Aug 4, 2025

Quiz Flashcard

Share on Facebook Share on Twitter Share on Whatsapp Share on Pinterest Share on Email Copy to Clipboard Embed on your website

Question 1 / 16

0 %

0/100

Score 0/100

1. What is the difference between Mass and Weight?

B. Mass is the measure of gravity on an object. Measured in newtons/pound

D. Mass and Weight are interchangeable terms

A. Balance ScaleB. Weight is the measure of gravity on an object. Measured in newtons/poundC. Mass - measure of particles;... A. Balance ScaleB. Weight is the measure of gravity on an object. Measured in newtons/poundC. Mass - measure of particles; constantWeight - gravity measure; changes w/ location

C. Weight is measured with a balance scale

Mass refers to the amount of matter in an object, and it remains constant regardless of the location, while weight is the measure of gravity acting on an object and can vary depending on the gravitational pull at different locations.

Explanation

Submit

About This Quiz

Prepare for your 8th-grade science midterm with this comprehensive assessment. Covering key topics and concepts, this assessment is designed to test your understanding and help solidify your knowledge in science, aligning with educational standards to ensure thorough preparation.

2. What first name or nickname would you like us to use?

You may optionally provide this to label your report, leaderboard, or certificate.

2. Name and describe six properties of Matter.

B. Transparency - Substance's ability to allow light to pass through

C. Flexibility - Ability of a substance to bend without breaking

A. Weight - Measure of the force of gravity on an object

A. Density - Amount of mass in a given volume B. Solubility - Substance ability to dissolve in another substanceC.... A. Density - Amount of mass in a given volume B. Solubility - Substance ability to dissolve in another substanceC. Ductility - Ability to be pulled into a wireD. Malleability - Abililty of substance to be rolled or pounded into thin sheetsE. State - Physical form in which matter existsF. Thermal Conductivity - Rate at which substance transfers heat

The incorrect answers provided do not accurately describe properties of matter as outlined in the correct answer. Weight is different from density, transparency is different from solubility, and flexibility is not equivalent to ductility or malleability.

Explanation

Submit

3. What are chemical properties? Provide examples.

Properties related to movement and energy. Ex: Velocity, Kinetic Energy

A. A property that describes a substance's ability to react or participate in a chemical reaction. Ex: Flammability, Reactivity B.... A. A property that describes a substance's ability to react or participate in a chemical reaction. Ex: Flammability, Reactivity B. Ash and Smoke C. Rust

Properties that impact taste and smell. Ex: Sourness, Odor

Physical properties that affect color and size. Ex: Density, Boiling Point

Chemical properties describe how a substance behaves in the presence of other substances, such as undergoing a chemical reaction. Examples include flammability and reactivity.

Explanation

Chemical properties describe how a substance behaves in the presence of other substances, such as undergoing a chemical reaction. Examples include flammability and reactivity.

Submit

4. States of Matter

B. not definite, definite

D. not definite, not definite

C. definite, definite

A. definite, not definite B. definite, not definite C. not definite, not definite

Solids have a definite volume because they have a fixed shape, while liquids do not have a definite shape but have a definite volume. Gases, on the other hand, do not have a definite shape or volume.

Explanation

Solids have a definite volume because they have a fixed shape, while liquids do not have a definite shape but have a definite volume. Gases, on the other hand, do not have a definite shape or volume.

Submit

5. Mixture vs. Compound

C. A homogeneous mixture of two or more substances.

A. A combination of substances that can be seperated by physical meansB. A chemical combination of two or more elements... A. A combination of substances that can be seperated by physical meansB. A chemical combination of two or more elements which are combined chemically.C. A homogeneous mixture of two or more substances.D. Samples taken from different areas of the mixture would be the same.

B. A chemical combination of two or more elements which are combined chemically.

D. Samples taken from different areas of the mixture would be the same.

In this question, it is important to distinguish between mixtures and compounds. While mixtures can be separated by physical means, compounds are chemically combined. Solutions specifically refer to homogeneous mixtures, and the term 'homogeneous' means that samples taken from different areas of the mixture would be the same.

Explanation

Submit

6. What is the dense, central region of an atom called?

A. NucleusB. Positively charged particle found in the nucleus with amu of 1. C. A particle with no charge found... A. NucleusB. Positively charged particle found in the nucleus with amu of 1. C. A particle with no charge found in the nucleus with amu of 1. D. Tiny, negatively charged particle found circling the nucleus.

D. Isotopes

B. Electrons

C. Valence Shell

The nucleus is the dense, central region of an atom that contains protons and neutrons.

Explanation

The nucleus is the dense, central region of an atom that contains protons and neutrons.

Submit

7. What is an ion?

C. A compound made up of two or more elements chemically combined in a fixed ratio.

A. A radioactive element with a stable nucleus.

A. An atom or molecule that has gained or lost one or more electrons and has a negative or positive... A. An atom or molecule that has gained or lost one or more electrons and has a negative or positive charge.B. An atom with the same # of protons as other atoms of that element but a different # of neutrons.C. Force of attraction between two oppositely charged ions.D. A bond formed when atoms share one or more pairs of electrons.

B. An atom that does not participate in chemical reactions.

An ion is an atom or molecule that has gained or lost electrons, resulting in a negative or positive charge.

Explanation

An ion is an atom or molecule that has gained or lost electrons, resulting in a negative or positive charge.

Submit

8. Which particle is which in an atom structure?

A. The + particles are protons.B. The neutral particles are neutrons.C. The white - particles are electrons. D. The rings... A. The + particles are protons.B. The neutral particles are neutrons.C. The white - particles are electrons. D. The rings around the nucleus are energy levels.

C. The white - particles are electrons.

D. The rings around the nucleus are energy levels.

B. The neutral particles are neutrons.

In an atom structure, protons are positively charged particles, neutrons are neutrally charged particles, and electrons are negatively charged particles. The rings around the nucleus represent energy levels where electrons are found.

Explanation

Submit

9. Tests What is the test for...

Burning splint creates a fizzing sound

Glowing splint extinguishes

Litmus paper turns blue

A. Bromothymol Blue turns yellow B. Glowing splint relightsC. Buring splint makes the gas popD. Bubbles; unexpected color change; production... A. Bromothymol Blue turns yellow B. Glowing splint relightsC. Buring splint makes the gas popD. Bubbles; unexpected color change; production of a new substance

When testing for gases, it is important to use specific indicators or methods that react to the presence of the gas in question. The correct test for each gas is essential to accurately identify its presence in a sample.

Explanation

Submit

10. What is the definition of an atom?

B. the mass of an atom expressed in atomic mass units

A. the smallest unit of an element that maintains the chemical properties of that element B. the mass of an... A. the smallest unit of an element that maintains the chemical properties of that element B. the mass of an atom expressed in atomic mass unitsC. the # of protons in an atom; same for all atoms of an elementD. A substance that cannot be broken down into simpler substances by chemical means

C. the # of protons in an atom; same for all atoms of an element

D. A substance that cannot be broken down into simpler substances by chemical means

The correct answer explains the fundamental building block of an element, maintaining its unique properties.

Explanation

The correct answer explains the fundamental building block of an element, maintaining its unique properties.

Submit

11. What is the periodic table?

A chart displaying the different types of mathematical functions

A. an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in... A. an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column or groupB. Full outer energy level; Stable atoms called "Noble Gases"C. Missing 1 electron in outer energy level; makes ions w/ -1 chargeD. 1 electron in outer level; makes ions with +1 chargeE. 2 electrons in outer level(FULL); makes ions with +2 charge

A table that shows the daily recommended intake of various nutrients

A method used to predict the weather patterns

The periodic table is a systematic way of organizing the chemical elements based on their atomic numbers and properties.

Explanation

The periodic table is a systematic way of organizing the chemical elements based on their atomic numbers and properties.

Submit

12. Which of the following represents the symbol and word equation for photosynthesis?

C. Reactants ---> water, carbon dioxide Products ---> glucose sugar, oxygen gas

D. Reactants ---> glucose sugar, oxygen gas Products ---> water, carbon dioxide

A. symbol - H2O + CO2 + Light Energy ----> C6H12O6 + O2 Word - Water + Carbon Dioxide &... A. symbol - H2O + CO2 + Light Energy ----> C6H12O6 + O2 Word - Water + Carbon Dioxide & Light Energy produces glucose sugar and oxygen gas B. symbol - C6H12O6 + O2 -----> H2O + CO2 + Energy Word - Glucose sugar and oxygen gas produces water & carbon dioxide & energy C. Reactants ---> water, carbon dioxide Products ---> glucose sugar, oxygen gasD. D.Reactants ---> glucose sugar, oxygen gas Products ---> water, carbon dioxide

B. symbol - C6H12O6 + O2 -----> H2O + CO2 + Energy, Word - Glucose sugar and oxygen gas produces... B. symbol - C6H12O6 + O2 -----> H2O + CO2 + Energy, Word - Glucose sugar and oxygen gas produces water & carbon dioxide & energy

Photosynthesis involves the conversion of water, carbon dioxide, and light energy into glucose sugar and oxygen gas. The correct symbol and word equation for photosynthesis is A.

Explanation

Photosynthesis involves the conversion of water, carbon dioxide, and light energy into glucose sugar and oxygen gas. The correct symbol and word equation for photosynthesis is A.

Submit

13. Atomic Structure A. 1st energy level can hold up to _ electrons. B. 2nd energy level can hold up to _ electrons. C. 3rd energy level can hold up to _ electrons. D. The # of electrons = the _____ #.

A. 2B. 8C. 8D. Atomic

Random

In an atom, each energy level has a maximum capacity of electrons as follows: 1st energy level can hold up to 2 electrons, 2nd energy level can hold up to 8 electrons, and 3rd energy level can hold up to 8 electrons. The total number of electrons in an atom is equal to its atomic number.

Explanation

Submit

14. What does the chemical formula 2CuSO4 represent in terms of number of atoms of each element in a molecule of copper sulfate?

1, 2, copper, 1, sulfur, 4, oxygen ---> 1, 2, 4

3, 1, copper, 1, sulfur, 4, oxygen ---> 3, 1, 4

A. One of two or more atoms held together by a chemical bond. B. A group of chemicals that... A. One of two or more atoms held together by a chemical bond. B. A group of chemicals that shows the make up of a compound. C. 2, 1, copper, 1, sulfur, 4, oxygen---> 2, 2, 8

2, 2, copper, 2, sulfur, 4, oxygen ---> 2, 2, 8

The correct interpretation of 2CuSO4 is that each molecule of copper sulfate contains 2 atoms of copper, 1 atom of sulfur, and 4 atoms of oxygen, resulting in a total of 2 atoms of each element in the molecule.

Explanation

Submit

15. Who is credited with the discovery of the Atomic Theory?

C. Rutherford

A. One solid thing B. Plum pudding model; electrons spread around C. Discovered Nucleus and other particles D.... A. One solid thing B. Plum pudding model; electrons spread around C. Discovered Nucleus and other particles D. Electrons travel on energy paths E. Discovered nucleous; electrons are found in clouds orbiting nucleus

B. JJ Thomson

D. Neils Bohr

The Atomic Theory was initially proposed by the Ancient Greeks, laying the foundation for our modern understanding of atoms and matter.

Explanation

The Atomic Theory was initially proposed by the Ancient Greeks, laying the foundation for our modern understanding of atoms and matter.

Submit

16. What is Inertia?

The force that pulls objects towards each other.

The ability of an object to float in water.

A. Tendency of an object to resist a change in motion. B. Get moving C. Stop

The speed at which an object is moving.

Inertia is the tendency of an object to resist a change in motion, whether the object is at rest or moving. It is not related to the force of gravity, buoyancy, or speed.

Explanation

Inertia is the tendency of an object to resist a change in motion, whether the object is at rest or moving. It is not related to the force of gravity, buoyancy, or speed.

Submit