100+ Free North Carolina EOG Science Grade 8 Practice Questions

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Key Facts: North Carolina EOG Science Grade 8 Exam

NCDPI

State Agency

NC Department of Public Instruction

Grade 8

Grade Level

NCSCOS for Science (2023)

100 Practice Questions

Question Count

OpenExamPrep Bank

NCSCOS for Science Grade 8 (PS.8, LS.8, ESS.8)

Standards

NCDPI EOG Science Test Specifications (April 2026)

Prepare for the North Carolina EOG Science Grade 8 test with 100 practice questions spanning atoms and the periodic table, cells and body systems and natural selection, and Earth's place in the universe, plate tectonics, climate, and human impacts.

Sample North Carolina EOG Science Grade 8 Practice Questions

Try these sample questions to test your North Carolina EOG Science Grade 8 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which subatomic particle has a positive charge and is found in the nucleus of an atom?

A.Proton

B.Neutron

C.Electron

D.Photon

Explanation: Protons are located in the nucleus and carry a positive charge. Neutrons are also in the nucleus but are neutral, while electrons are negatively charged and orbit the nucleus.

2An element is a pure substance made of atoms that all have the same number of which particle?

A.Neutrons

B.Protons

C.Electrons in the outer shell

D.Energy levels

Explanation: An element is defined by its atomic number, which is the number of protons in the nucleus. All atoms of an element have the same proton count; neutron and electron numbers can vary.

3On the periodic table, what does a horizontal row (period) tell you about the elements in it?

A.They have the same number of valence electrons

B.They have the same number of electron energy levels

C.They have the same atomic mass

D.They have identical chemical properties

Explanation: A period (horizontal row) indicates elements whose atoms have the same number of electron energy levels (shells). Columns (groups) share the same number of valence electrons and similar chemistry.

4Which type of bond forms when one atom transfers an electron to another atom, creating charged ions that attract?

A.Covalent bond

B.Ionic bond

C.Metallic bond

D.Hydrogen bond

Explanation: An ionic bond forms when electrons are transferred from one atom to another, producing positive and negative ions that are attracted to each other. Covalent bonds involve sharing electrons instead.

5Which observation is the best evidence that a chemical reaction has occurred?

A.A solid is crushed into powder

B.A substance changes color and releases a gas

C.Water evaporates from a puddle

D.Salt dissolves in water

Explanation: A color change and gas release indicate new substances with different properties formed, which is evidence of a chemical reaction. The other choices are physical changes that keep the same substances.

6In a closed container, a chemical reaction produces a gas from a solid and a liquid. What happens to the total mass of the container?

A.It increases

B.It decreases

C.It stays the same

D.It depends on the gas produced

Explanation: The law of conservation of mass states that matter is not created or destroyed in a chemical reaction. In a closed container, the gas cannot escape, so the total mass remains constant.

7An atom has 8 protons and 8 electrons. After it gains 2 electrons to become an ion, what is the ion's charge?

A.+2

B.-2

C.0

D.+10

Explanation: Gaining electrons adds negative charge. The atom now has 8 protons (+8) and 10 electrons (-10), giving a net charge of -2.

8Where on the periodic table are the elements that are malleable, conduct electricity well, and tend to lose electrons during bonding?

A.Far right (nonmetals)

B.Far left and middle (metals)

C.The zigzag stair-step (metalloids)

D.The noble gases

Explanation: Metals are located on the left and center of the periodic table. They are malleable, good conductors, and typically lose electrons to form positive ions in bonds.

9Group 1 elements (alkali metals) are very reactive. Which statement best explains why?

A.They have a full outer energy level

B.They have one valence electron that is easily lost

C.They have many neutrons in the nucleus

D.They are located in the same period

Explanation: Group 1 elements each have one valence electron that is easily lost, producing a stable full outer shell. This makes them highly reactive, especially with water.

10Sodium (Na, Group 1) reacts with chlorine (Cl, Group 17). What is the most likely formula of the compound formed, and how do the ions combine?

A.NaCl; one Na+ ion bonds with one Cl- ion

B.NaCl2; one Na+ ion bonds with two Cl- ions

C.Na2Cl; two Na+ ions bond with one Cl- ion

D.NaCl with equal sharing of one electron

Explanation: Sodium loses one electron to become Na+ and chlorine gains one electron to become Cl-. The opposite charges balance 1:1, giving the formula NaCl through ionic bonding.

About the North Carolina EOG Science Grade 8 Exam

The North Carolina EOG Science Test at Grade 8 measures proficiency on the NCSCOS for Science (adopted July 2023) across Physical Science, Life Science, and Earth & Space Science, integrating Science and Engineering Practices. It is a multistage fixed adaptive assessment delivered online through NCTest with an online periodic table. This 100-question practice bank is an English-language MCQ study adaptation.

Assessment

Online multistage fixed adaptive assessment (three levels, NCPAT design) delivered through NCTest with four-response-option multiple-choice and technology-enhanced items in standalone and item-set formats; an online periodic table is provided. This local bank contains 100 English four-option practice MCQs across 3 science domains.

Time Limit

Estimated 120 minutes; maximum 180 minutes

Passing Score

Four achievement levels: Not Proficient, Level 3, Level 4, Level 5. Level 3 and above denotes proficiency.

Exam Fee

No fee to students (North Carolina Department of Public Instruction (NCDPI))

North Carolina EOG Science Grade 8 Exam Content Outline

16-22%

Physical Science

Atomic model, elements and the periodic table, bonding, chemical reactions, and conservation of mass.

33-41%

Life Science

Cell structure and function and body systems, ecosystem resources and populations, and biological evolution by natural selection and common ancestry.

42-50%

Earth & Space Science

Earth's place in the universe (gravity, seasons, Moon phases, fossils and strata), plate tectonics and weather/climate, and natural resources, hazards, and human impacts.

How to Pass the North Carolina EOG Science Grade 8 Exam

What You Need to Know

Passing score: Four achievement levels: Not Proficient, Level 3, Level 4, Level 5. Level 3 and above denotes proficiency.
Assessment: Online multistage fixed adaptive assessment (three levels, NCPAT design) delivered through NCTest with four-response-option multiple-choice and technology-enhanced items in standalone and item-set formats; an online periodic table is provided. This local bank contains 100 English four-option practice MCQs across 3 science domains.
Time limit: Estimated 120 minutes; maximum 180 minutes
Exam fee: No fee to students

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

North Carolina EOG Science Grade 8 Study Tips from Top Performers

1Use the periodic table to identify element symbols, atomic number, and groups when answering physical-science items.

2Link natural selection to variation, inheritance, and differential survival rather than individual effort.

3Connect plate tectonics to earthquakes, volcanoes, and rock cycle processes.

4Cite data from graphs and tables to support claims about ecosystems and Earth systems.

Frequently Asked Questions

What is the NC EOG Science Grade 8 test?

It measures Grade 8 proficiency on the NCSCOS for Science (adopted July 2023) via an online multistage fixed adaptive assessment delivered through NCTest, with four-response-option multiple-choice and technology-enhanced items; an online periodic table is provided.

What achievement levels are reported?

Four levels: Not Proficient, Level 3, Level 4, and Level 5. Level 3 and above denotes grade-level proficiency.

Is this practice bank affiliated with NCDPI?

No. It is an independent study resource aligned to the public NCSCOS for Science Grade 8; it is not an official NCTest product.

100+ Free North Carolina EOG Science Grade 8 Practice Questions

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