Grade 8 Science Worksheets

Learning Objectives

• Identify observable indicators that demonstrate a chemical change.
• Differentiate between physical and chemical changes based on evidence.
• Recognize real-world examples of chemical reactions and their indicators.+ Show more

Learning Objectives

• Differentiate between mass and weight and understand their scientific definitions.
• Explain how gravitational force affects the weight of an object regardless of its mass.
• Analyze regional examples illustrating mass-based measurements and weight considerations.+ Show more

Learning Objectives

• Explain the stages of the cell cycle, including interphase, mitosis, and cytokinesis.
• Describe the roles of cyclins, kinases, and checkpoint mechanisms in regulating cell division.
• Analyze the significance of proper cell cycle regulation in tissue growth, wound repair, and prevention of diseases such as cancer.+ Show more

Learning Objectives

• Explain how particle motion relates to temperature and states of matter.
• Describe phase changes such as melting, boiling, and condensation.
• Relate microscopic particle behavior to macroscopic temperature and heat transfer.+ Show more

Learning Objectives

• Understand the atomic composition of simple molecules and extended structures.
• Interpret particle models and symbolic formulas of molecules.
• Identify different types of bonds and arrangements in molecules like water, carbon dioxide, and salts.+ Show more

Learning Objectives

• Understand the universal nature of gravity and how it depends on mass and distance.
• Explain the inverse-square pattern of gravitational force.
• Describe manifestations of gravity such as planetary orbits, satellite motion, and tidal effects.+ Show more

Learning Objectives

• Understand the forms of mechanical energy such as kinetic and potential energy.
• Explain how energy transfers occur through forces doing work and energy transformation.

Learning Objectives

• Understand how distance-time graphs represent motion and interpret their slopes.
• Calculate average speed using change in distance and change in time from graphs.
• Analyze graph segments to identify periods of constant, increasing, or decreasing speed.+ Show more

Learning Objectives

• Describe electric and magnetic field interactions.
• Explain how force magnitude relates to charge, pole strength, and distance.
• Differentiate between electric and magnetic forces based on properties and interactions.+ Show more

Learning Objectives

• Understand the concepts of electric and magnetic forces and how they interact.
• Explain how electric and magnetic forces depend on properties such as charge, pole strength, and distance.
• Identify real-world examples of electric and magnetic interactions, including magnetic dipoles and currents.+ Show more

Learning Objectives

• Describe the iterative nature of the scientific method and inquiry.
• Identify key components such as hypotheses, operational definitions, and predictions.
• Understand the importance of empirical evidence and controlled comparisons in scientific reasoning.+ Show more

Learning Objectives

• Explain how divergent, convergent, and transform plate boundaries affect Earth’s surface
• Identify ways uplift, faulting, and erosion reshape landscapes over long periods
• Use evidence from volcanism and earthquakes to infer plate interactions+ Show more

Learning Objectives

• Explain how a scientific model links variables to observed outcomes.
• Identify assumptions and predict patterns using a model.
• Interpret data trends described by a predictive model.+ Show more

Learning Objectives

• Explain how igneous, sedimentary, and metamorphic rocks form from changing Earth materials.
• Describe how minerals form and how their composition affects physical properties.
• Connect the rock cycle to long-term Earth changes driven by tectonic activity.

Learning Objectives

• Explain energy conservation using the idea of a system and its surroundings.
• Describe how energy can change forms during energy transfers without changing total energy.
• Predict how mechanical energy changes when friction and height are involved.+ Show more

Learning Objectives

• Identify testable claims by linking a measurable factor to an observable outcome
• Write or evaluate hypotheses using clear variables and realistic expectations
• Determine what data patterns would support or weaken a hypothesis

Learning Objectives

• Distinguish correlation from causation when evaluating scientific claims.
• Use evidence direction, alternative explanations, and consistency to judge causal reasoning.
• Identify what additional data would be needed to support or rule out competing causes.

Learning Objectives

• Explain how organ systems help organisms obtain nutrients, exchange gases, balance water, and move materials
• Identify key structures in major organ systems and match them to their functions
• Use evidence from scenarios to predict how changes in organ systems affect survival+ Show more

Learning Objectives

• Distinguish short-term weather variability from long-term climate patterns using data and graphs.
• Interpret temperature, precipitation, and storm-frequency data to describe variability and trends over time.
• Explain how summary statistics (averages and typical ranges) help identify change versus fluctuation.+ Show more

Learning Objectives

• Explain how energy changes form during physical processes using the terms mechanical, thermal, electrical, and light energy.
• Describe how friction can transform mechanical energy into thermal energy and how this shows up as warming.
• Track energy as it transfers between objects or systems and identify that energy does not disappear.+ Show more

Learning Objectives

• Identify appropriate axes, units, and scales for data on a graph
• Interpret scatter plots, line graphs, and bar graphs for trends and relationships
• Use models to summarize patterns without adding new variables+ Show more

Learning Objectives

• Explain how forces can be push or pull interactions that change motion
• Describe the difference between balanced and unbalanced forces using net force
• Predict how velocity changes when forces act in the same or opposite directions+ Show more

Learning Objectives

• Explain how chemical reactions rearrange atoms to form new substances.
• Use a particle model to describe changes in bonding and the number of each substance’s particles after a reaction.
• Connect observable evidence (color, gas, temperature change) to particle-level and energy-level changes using reaction models.+ Show more

Learning Objectives

• Compare how crater density and smooth plains can indicate different surface ages.
• Explain how resurfacing events can reduce visible crater impacts on planetary surfaces.
• Use relationships between impact structures and surrounding materials to infer relative age.

Learning Objectives

• Explain how chemical reactions provide evidence that new substances form.
• Use particle models to describe conservation of atoms during chemical reactions.
• Predict and interpret reaction evidence such as gas production, precipitates, and color change in a closed system.+ Show more

Learning Objectives

• Explain how net force is determined when multiple forces act in different directions.
• Predict how balanced and unbalanced forces affect an object’s acceleration and motion.
• Use weight and friction as examples of forces that can change an object’s motion.+ Show more

Learning Objectives

• Identify a claim, evidence, and reasoning in a CER argument.
• Use relevant measurements, trends, or comparisons as evidence.
• Explain how reasoning connects evidence to a scientific mechanism.+ Show more

Learning Objectives

• Explain how technology choices can affect air quality, resource use, noise levels, and safety risks.
• Compare benefits and trade-offs of a technology by considering short-term performance and long-term impacts.
• Use evidence from a scenario to judge whether a solution is responsible overall.

Learning Objectives

• Describe how feedback loops help maintain a stable internal environment.
• Identify the roles of receptors, control centers, and effectors in homeostasis.
• Explain how changes in temperature, blood sugar, or water level can trigger responses.+ Show more

Learning Objectives

• Explain how engineering models connect inputs to expected outputs.
• Describe how model predictions are compared with prototype or measurement data.
• Use evidence to justify how a model is adjusted to improve design refinement.

Learning Objectives

• Explain how runoff, erosion, transport, and deposition reshape Earth’s surface.
• Describe how groundwater affects springs and contributes to weathering.
• Relate slope (gradient) and drainage patterns to where sediment accumulates.+ Show more

Learning Objectives

• Explain how evidence supports a claim using a mechanism that matches observed data
• Compare alternative explanations by stating what evidence supports, rules out, and would discriminate
• Describe uncertainty or limits when evidence is mixed rather than overstating certainty+ Show more

Learning Objectives

• Explain how calibration improves accuracy and how consistent procedures improve precision
• Distinguish random variation from real effects by using replication
• Justify how outliers should be handled to preserve data integrity without bias+ Show more

Learning Objectives

• Identify independent, dependent, and controlled variables in a study plan
• Explain how control variables reduce confounding in experimental results
• Choose measurable data collection methods that match a research question+ Show more

Learning Objectives

• Identify measurable success criteria in an engineering design problem
• Differentiate constraints from criteria and explain how each guides design choices
• Rewrite an engineering goal into clear success criteria and specific constraints+ Show more

Learning Objectives

• Explain how evaporation, condensation, and precipitation move water between the atmosphere and Earth’s surface
• Describe how infiltration, runoff, and subsurface storage change water availability over time
• Use a reservoir-and-pathway model to interpret water transfers within the water cycle+ Show more

Learning Objectives

• Explain how materials, manufacturing, use, and end-of-life stages affect the overall environmental impact of a product
• Compare two design options by evaluating tradeoffs across the full life cycle rather than a single stage
• Identify evidence-based relationships between maintenance needs, energy use, waste, and pollution+ Show more

Learning Objectives

• Explain how atoms rearrange to form new products during a reaction
• Describe how particle arrangements relate to observable reaction outcomes
• Connect energy changes in a reaction to temperature changes in the environment

Learning Objectives

• Compare endothermic and exothermic reactions using energy flow and temperature evidence
• Explain energy changes using particle motion and bonding rearrangements rather than energy from outside
• Interpret models of exothermic and endothermic reactions to predict whether the surroundings warm or cool

Learning Objectives

• Describe how predation, competition, mutualism, and parasitism affect survival and reproduction
• Explain how interactions between species can change population size over generations
• Use evidence from a passage to identify relationships that increase or decrease survival+ Show more

Learning Objectives

• Explain how particle motion relates to gas temperature and pressure
• Describe how changes in collision frequency and force affect gas pressure
• Use particle ideas to connect macroscopic observations to microscopic models

Learning Objectives

• Explain how particle spacing and motion differ in solids, liquids, and gases.
• Connect temperature to the motion of particles in matter.
• Describe how state changes relate to changes in particle arrangement and motion.+ Show more

Learning Objectives

• Identify common failure points in a design and link each to a specific feature.
• Explain why a failure occurs using cause-and-effect reasoning.
• Describe trade-offs involved in revising a design while meeting constraints.+ Show more

Learning Objectives

• Explain how inherited traits can differ between siblings even when parents have the same genes.
• Describe how recombination during reproduction creates new combinations of genes.
• Use evidence from families and populations to support the idea that variation affects survival under local conditions.

Learning Objectives

• Explain how observations and measurements provide evidence for a solution.
• Compare quantitative data and qualitative observations when judging an outcome.
• Determine whether evidence supports stated criteria and reduces the role of chance.+ Show more

Learning Objectives

• Explain how long-term climate patterns differ from short-term weather variability
• Identify how feedbacks can amplify or dampen climate change
• Use evidence from temperature and precipitation records to support climate-based explanations+ Show more

Learning Objectives

• Explain how density and composition evidence support the idea of planetary differentiation
• Describe how orbital patterns and arrangement of bodies provide evidence for gravitational interactions during early solar system evolution
• Interpret crater, volcanic, ring, and moon evidence to infer impact history and resurfacing+ Show more

Learning Objectives

• Explain how gene variants can lead to different observable traits (phenotypes)
• Use dominant and recessive patterns to predict which traits appear across generations
• Describe how relationships and mutations provide evidence of genetic inheritance+ Show more