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120+ Free PSSA Grade 8 Science Practice Questions

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2026 Statistics

Key Facts: PSSA Grade 8 Science Exam

100 Questions

Practice Question Bank Size

OpenExamPrep Practice Bank

35% Weight

Life Sciences Domain

PDE Grade 8 Science Blueprint

30% Weight

Physical Sciences Domain

PDE Grade 8 Science Blueprint

25% Weight

Earth and Space Sciences Domain

PDE Grade 8 Science Blueprint

10% Weight

Scientific Inquiry Domain

PDE Grade 8 Science Blueprint

The PSSA Grade 8 Science exam assesses student mastery of middle school science standards across four core reporting categories: Life Sciences (35%), Physical Sciences (30%), Earth and Space Sciences (25%), and Scientific Inquiry (10%). Designed by the Pennsylvania Department of Education, the exam tests both quantitative and conceptual problem-solving capabilities.

Sample PSSA Grade 8 Science Practice Questions

Try these sample questions to test your PSSA Grade 8 Science exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 120+ question experience with AI tutoring.

1Which statement correctly describes the location and electrical charge of subatomic particles within an atom?
A.Protons are negatively charged in the nucleus, while electrons are positively charged in the electron cloud.
B.Protons are positively charged and neutrons are neutral in the nucleus, while electrons are negatively charged outside the nucleus.
C.Neutrons are positively charged in the nucleus, while protons and electrons are neutral in the outer shells.
D.Electrons and protons are both inside the nucleus with neutral charges, while neutrons orbit outside.
Explanation: Protons have a positive (+1) charge and neutrons have no charge (0); both reside in the dense central nucleus. Electrons have a negative (-1) charge and occupy the energy levels surrounding the nucleus.
2The atomic number of an element on the periodic table represents which of the following?
A.The total number of protons in the nucleus of an atom
B.The combined total number of protons and neutrons
C.The total number of neutrons minus the number of electrons
D.The average atomic mass of all naturally occurring isotopes
Explanation: The atomic number uniquely identifies an element and equals the exact number of protons in its nucleus. In a neutral atom, it also equals the number of electrons.
3An atom of Carbon has an atomic number of 6 and contains 7 neutrons in its nucleus. What is the mass number of this Carbon isotope?
A.6
B.7
C.13
D.42
Explanation: The mass number is calculated by adding the number of protons (atomic number = 6) and neutrons (7): 6 + 7 = 13. This represents Carbon-13.
4Why are elements in Group 18 of the periodic table (the noble gases like Neon and Argon) extremely unreactive under normal conditions?
A.They have only one valence electron that is easily lost.
B.Their outermost energy levels are completely full with 8 valence electrons.
C.They contain no protons in their nucleus.
D.They are all metallic solids that resist chemical changes.
Explanation: Noble gases have a full outer valence shell (8 valence electrons, or 2 for Helium), satisfying the octet rule. Because their outer shell is stable, they do not readily gain, lose, or share electrons.
5When a sodium atom (Na) reacts with a chlorine atom (Cl) to form table salt (NaCl), which process takes place?
A.Sodium and chlorine share a pair of electrons equally to form a covalent bond.
B.Sodium gains an electron to become a negative ion, while chlorine loses an electron.
C.Protons are transferred from the chlorine nucleus into the sodium nucleus.
D.Sodium transfers its one valence electron to chlorine, forming positive (Na+) and negative (Cl-) ions that attract.
Explanation: Sodium (metal) transfers its 1 valence electron to chlorine (nonmetal). Sodium becomes a positively charged ion (Na+), and chlorine becomes a negatively charged ion (Cl-). The electrostatic attraction between oppositely charged ions forms an ionic bond.
6Which of the following describes a physical change rather than a chemical change?
A.Ice melting into liquid water on a warm countertop
B.An iron nail rusting after exposure to rain and air
C.A piece of wood burning in a fireplace to form ash and smoke
D.Baking soda reacting with vinegar to produce gas bubbles
Explanation: Melting ice is a physical change because water changes state from solid to liquid, but its chemical composition (H2O) remains identical. Rusting, burning, and vinegar-baking soda reactions produce new substances with different chemical properties.
7A student mixes two clear liquid solutions together in a beaker. Which observation provides the BEST evidence that a chemical reaction has occurred?
A.The total volume of liquid in the beaker increases.
B.The liquid mixture takes the shape of the beaker.
C.A bright yellow solid precipitate forms and the beaker feels warm.
D.The liquid can be separated back into two layers by sitting undisturbed.
Explanation: Formation of a solid precipitate, unexpected color change, and temperature change (exothermic energy release) are key indicators that a chemical reaction occurred and new substances formed.
8A student seals 50 grams of vinegar and 10 grams of baking soda inside an airtight plastic container and measures a total initial mass of 120 grams (including the container). After the chemical reaction stops bubbling, what will be the total mass of the sealed container and its contents?
A.60 grams
B.120 grams
C.110 grams
D.130 grams
Explanation: According to the Law of Conservation of Mass, matter cannot be created or destroyed in a chemical reaction. In a closed/sealed container, no gas can escape, so the total mass before reaction (120 g) equals the total mass after reaction (120 g).
9Consider the chemical equation for water synthesis: 2 H2 + O2 -> 2 H2O. How many total hydrogen atoms and oxygen atoms are present on the reactant side?
A.4 hydrogen atoms and 2 oxygen atoms
B.2 hydrogen atoms and 2 oxygen atoms
C.4 hydrogen atoms and 4 oxygen atoms
D.2 hydrogen atoms and 1 oxygen atom
Explanation: On the reactant side, 2 H2 means 2 x 2 = 4 hydrogen atoms. O2 means 1 x 2 = 2 oxygen atoms. The product side (2 H2O) also has 4 H and 2 O atoms, showing the equation is balanced.
10Dry ice (solid carbon dioxide) transforms directly into carbon dioxide gas at room temperature without turning into a liquid first. What is this phase change called?
A.Evaporation
B.Condensation
C.Freezing
D.Sublimation
Explanation: Sublimation is the phase change in which a solid transitions directly into a gas without passing through the liquid phase.

About the PSSA Grade 8 Science Exam

The PSSA Grade 8 Science assessment measures student proficiency in Pennsylvania's Academic Standards and Science, Technology & Engineering, Environmental Literacy, and Sustainability (STEELS) Standards. It evaluates core concepts across Physical Sciences, Life Sciences, Earth and Space Sciences, and Scientific Inquiry.

Assessment

Two sections of 24 autoscored one-point items and 2 three-point open-ended items each. The STEELS blueprint targets 20-30% of the core in each of four reporting categories: Life Sciences and Environmental Literacy & Sustainability, Physical Sciences, Earth & Space Sciences, and Technology and Engineering.

Time Limit

Untimed; PDE's 2025 Science test design plans two sections with an estimated 44 minutes of testing each. Delivered online only beginning with the Spring 2026 administration.

Passing Score

Proficient level

Exam Fee

Free (State-administered) (Pennsylvania Department of Education (PDE))

PSSA Grade 8 Science Exam Content Outline

20%-30%

Life Sciences and Environmental Literacy & Sustainability

Cells and cell processes, photosynthesis and respiration, heredity and DNA, natural selection and evolution, ecosystem energy flow, biodiversity, and human impacts.

20%-30%

Physical Sciences

Atomic structure and the periodic table, chemical reactions and conservation of mass, Newton's laws, kinetic and potential energy, and wave properties.

20%-30%

Earth & Space Sciences

Plate tectonics, the rock cycle and geologic time, atmosphere and weather, ocean circulation, water and carbon cycling, and solar system and stellar patterns.

20%-30%

Technology and Engineering

Criteria and constraints, systematic evaluation of competing solutions, analyzing test data and iterating designs, systems and feedback control, lab and tool safety, and impacts and trade-offs of technology.

How to Pass the PSSA Grade 8 Science Exam

What You Need to Know

  • Passing score: Proficient level
  • Assessment: Two sections of 24 autoscored one-point items and 2 three-point open-ended items each. The STEELS blueprint targets 20-30% of the core in each of four reporting categories: Life Sciences and Environmental Literacy & Sustainability, Physical Sciences, Earth & Space Sciences, and Technology and Engineering.
  • Time limit: Untimed; PDE's 2025 Science test design plans two sections with an estimated 44 minutes of testing each. Delivered online only beginning with the Spring 2026 administration.
  • Exam fee: Free (State-administered)

Keys to Passing

  • Work through all 120 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

PSSA Grade 8 Science Study Tips from Top Performers

1Review core concepts in life science including cell energy (photosynthesis/respiration), genetics (Punnett squares), and ecosystems.
2Master physical science principles such as Newton's laws, energy conversions (kinetic vs. potential), and wave characteristics.
3Practice interpreting data tables, graphs, and identifying independent/dependent variables in scientific investigations.
4Understand Earth science cycles including the rock cycle, plate tectonics, weather systems, and solar system scale models.

Frequently Asked Questions

What is the PSSA Grade 8 Science exam?

The PSSA Grade 8 Science exam is a standardized test administered to 8th-grade public school students in Pennsylvania to assess their mastery of state science standards.

What topics are covered on the PSSA Grade 8 Science test?

The test covers Physical Sciences (30%), Life Sciences (35%), Earth and Space Sciences (25%), and Scientific Inquiry (10%).

How is the PSSA Grade 8 Science exam scored?

Student performance is categorized into four performance levels: Advanced, Proficient, Basic, and Below Basic. Scaled scores reflect proficiency relative to PA Academic/STEELS Standards.