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Quizzes > Science > Other Sciences

Ready to Ace Your 8th Grade Science EOG Review Quiz?

Dive into our EOG Science Practice Test with Answer Key and master your prep!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustrating 8th Grade Science EOG Test Prep quiz on a teal background

Calling all 8th graders! Kickstart your eog test prep science review with our free EOG Test Prep Science Review quiz and see how much you truly know. Every question in this science EOG review quiz hones core concepts, builds confidence, and helps you master topics like cells, ecosystems, and physical changes. Whether you need a clear answer key for tricky problems or hands-on practice before test day, this tool has you covered. You'll get instant feedback, track progress, and discover test-taking strategies to shine. Dive into our science review module , then tackle more 8th grade practice questions . Ready to boost your score? Start now and conquer your EOG science test!

Which of the following is an example of a physical change?
Burning wood in a campfire
Baking a cake
Rusting of iron
Melting ice into water
A physical change alters the state or appearance of a substance without changing its chemical identity. Melting ice changes solid water into liquid water but remains H?O. In burning or rusting, new substances form through chemical reactions. Baking a cake also produces new compounds through chemical changes. Source
What is the basic unit of life in all living organisms?
Tissue
Organ
Molecule
Cell
The cell is considered the basic structural and functional unit of life. All organisms are composed of one or more cells, and all vital functions occur within cells. Tissues and organs are higher levels of organization made up of cells. Source
Which process do plants use to convert sunlight into chemical energy, producing glucose and oxygen?
Transpiration
Fermentation
Cellular respiration
Photosynthesis
Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose, releasing oxygen as a byproduct. Cellular respiration is the opposite process, using oxygen to break down glucose. Transpiration involves water loss, and fermentation is an anaerobic energy process. Source
Which state of matter has a definite volume but no definite shape?
Gas
Liquid
Solid
Plasma
Liquids have a definite volume but take the shape of their container, unlike solids (definite shape and volume) and gases (no definite shape or volume). Plasma, an ionized gas, also has neither definite shape nor volume. Source
Which instrument is typically used to measure the mass of an object in a science classroom?
Thermometer
Triple beam balance
Ruler
Spring scale
A triple beam balance measures mass directly in grams by comparing an object to known masses. A spring scale measures force (weight), not mass. A ruler measures length, and a thermometer measures temperature. Source
Which balanced chemical equation correctly represents the formation of water from hydrogen and oxygen?
H2 + O2 ? H2O
H2 + 2O2 ? H2O
2H2 + 2O ? 2H2O
2H2 + O2 ? 2H2O
The correct stoichiometric balancing is 2 molecules of hydrogen gas reacting with 1 molecule of oxygen gas to produce 2 molecules of water. This ensures atoms of each element are conserved. The unbalanced or incorrectly balanced equations violate this conservation. Source
In an energy pyramid, which organism would you find at the base as a primary producer?
Hawk
Snake
Algae
Rabbit
Primary producers, like algae, photosynthesize to create energy-rich food for the ecosystem. Consumers such as rabbits, snakes, and hawks occupy higher trophic levels. Algae support the rest of the food chain by converting solar energy into biomass. Source
Which of these substances is acidic when measured on the pH scale?
Household soap
Sea water
Baking soda solution
Lemon juice
Lemon juice typically has a pH around 2 - 3, making it acidic. Baking soda solution is basic, sea water is slightly basic, and household soaps are generally basic with pH above 7. Source
Which statement best describes Newton's First Law of Motion?
Force equals mass times acceleration.
Energy cannot be created or destroyed.
An object in motion stays in motion unless acted on by a net force.
For every action, there is an equal and opposite reaction.
Newton's First Law, also known as the law of inertia, states that an object's motion remains constant unless a net external force acts on it. The other statements correspond to Newton's Second Law, Third Law, and the law of conservation of energy. Source
Which of the following is an endothermic process?
Freezing water into ice
Combustion of gasoline
Photosynthesis in plants
Rust forming on iron
Endothermic processes absorb energy from the surroundings. Photosynthesis requires sunlight energy to produce glucose. Freezing, rusting, and combustion release energy, making them exothermic. Source
When crossing two heterozygous pea plants (Tt × Tt), what is the phenotypic ratio of tall to short offspring?
1:1
9:3:3:1
3:1
2:1
According to Mendel's law of segregation, a Tt × Tt cross yields 3 tall (TT or Tt) to 1 short (tt) phenotype. The 9:3:3:1 ratio applies to dihybrid crosses, and 1:1 or 2:1 ratios arise under other genetic scenarios. Source
Volcanoes most commonly form at which type of tectonic plate boundary?
Convergent boundary
Fracture zone
Passive margin
Transform boundary
Volcanoes often form where an oceanic plate subducts beneath another plate at a convergent boundary, causing melting of mantle material. Transform boundaries involve lateral sliding without significant melting, and passive margins lack active volcanism. Source
Using Ohm's Law (V = I × R), what is the voltage across a resistor of 4 ? with a current of 2 A flowing through it?
16 V
8 V
2 V
6 V
Ohm's Law states V (voltage) equals current (I) times resistance (R). Substituting gives V = 2 A × 4 ? = 8 volts. The other values result from incorrect multiplications or divisions. Source
Which organelle is primarily responsible for modifying, sorting, and packaging proteins for secretion?
Rough endoplasmic reticulum
Golgi apparatus
Lysosome
Mitochondrion
The Golgi apparatus receives proteins from the rough ER, modifies them (e.g., glycosylation), sorts them, and packages them into vesicles for transport. The rough ER synthesizes proteins; mitochondria produce ATP; lysosomes digest cellular waste. Source
Which scenario best illustrates natural selection in action?
Trees planted in a forest by a gardener
A dog trainer teaching a puppy tricks
Bacteria with antibiotic resistance surviving and reproducing
A frog jumping higher after a training program
Natural selection occurs when heritable traits that confer survival or reproductive advantages become more common in a population, such as antibiotic-resistant bacteria surviving drug exposure. Training or human intervention does not change genetic traits. Source
What primary force causes the rise and fall of tides on Earth?
Earth's rotation
Earth's magnetic field
Solar wind pressure
Gravitational pull of the Moon
Tides are caused mainly by the Moon's gravitational pull on Earth's oceans, with a smaller effect from the Sun. Earth's rotation moves coastlines through tidal bulges but does not create them. Solar wind and magnetic fields have negligible tidal effects. Source
Why does water's high specific heat capacity help moderate coastal climates?
Water loses heat quickly, cooling the air rapidly
Water absorbs or releases large amounts of heat with little temperature change
Water's heat of vaporization is low, causing rapid evaporation
Water molecules are nonpolar, reflecting heat back into space
Water's high specific heat means it can absorb or release substantial heat energy with minimal temperature change, buffering temperature swings near oceans. This thermal inertia keeps coastal regions cooler in summer and warmer in winter compared to inland areas. The other options misstate water's molecular properties or heat exchange behavior. Source
In a population at Hardy - Weinberg equilibrium with allele frequencies p = 0.8 and q = 0.2, what is the expected frequency of heterozygous individuals (2pq)?
0.36
0.16
0.32
0.64
Under Hardy - Weinberg equilibrium, the frequency of heterozygotes is 2pq. Substituting p = 0.8 and q = 0.2 gives 2 × 0.8 × 0.2 = 0.32. The other values come from squaring or adding the allele frequencies incorrectly. Source
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Study Outcomes

  1. Understand Core Science Concepts -

    Master fundamental topics in life, physical, and Earth science through targeted eog test prep science review questions.

  2. Apply Problem-Solving Techniques -

    Use strategies learned to solve 8th grade science EOG review practice problems with confidence and accuracy.

  3. Analyze Data and Graphs -

    Interpret charts, tables, and experimental data as featured in our science EOG review quiz to strengthen analytical skills.

  4. Interpret Detailed Answer Explanations -

    Consult the eog test prep science review answer key to understand each step and reinforce your reasoning process.

  5. Identify and Address Knowledge Gaps -

    Review quiz results to pinpoint weak areas and focus on targeted review before the EOG science practice test.

  6. Boost Confidence and Test Readiness -

    Engage with interactive review questions to build test-taking confidence and prepare effectively for the EOG exam.

Cheat Sheet

  1. Scientific Method Mastery -

    Understanding each step of the scientific method - question, hypothesis, experiment, observation, analysis, conclusion - is crucial for designing valid experiments. Remember the mnemonic "QHEROAC" (Question, Hypothesis, Experiment, Record, Observe, Analyze, Conclude) to recall each step in order. Practice applying it in our 8th grade science EOG review practice by outlining independent and dependent variables in sample scenarios.

  2. Matter and Chemical Reactions -

    Review atomic structure, the periodic table, and how elements combine into compounds using balanced chemical equations (e.g., 2H₂ + O₂ → 2H₂O). Use the conservation of mass principle from PhET simulations (University of Colorado Boulder) to visualize reactants and products. This core topic often appears in eog test prep science review questions addressing the law of conservation.

  3. Forces and Motion -

    Master Newton's three laws: F=ma for acceleration, action - reaction pairs, and inertia. A quick trick is "First Feety, Second Speedy, Third Thrusty" to recall each law's essence. Test your skills on a science EOG review quiz by calculating force, mass, or acceleration in real-world examples like a car accelerating.

  4. Energy Forms and Transformations -

    Distinguish between kinetic, potential, thermal, and chemical energy, and apply the formula KE=½mv² for moving objects. Trace energy flow in systems such as roller coasters or food chains, then check your reasoning against the eog test prep science review answer key for instant feedback. Understanding conservation of energy will boost your confidence on exam day.

  5. Earth and Space Systems -

    Explore the rock cycle, plate tectonics, and weather patterns by mapping processes like subduction and convection currents in Earth's mantle. Use diagrams from USGS and NOAA for accurate labeling of major plates and storm formation zones. Reinforce learning with an EOG science practice test to simulate timed conditions and hone your analytical skills.

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