Grade 8 Science Worksheets

Learning Objectives

• Explain linear momentum and impulse and how they relate to collisions in 1D.
• Use conservation of momentum to predict post-collision velocities for isolated systems.
• Distinguish elastic vs. inelastic collisions and interpret qualitative momentum transfer.+ Show more

Learning Objectives

• Distinguish between position, distance, speed, velocity, and acceleration.
• Identify scalar and vector quantities and explain why direction matters for velocity and acceleration.
• Interpret distance–time and velocity–time graphs and describe what they show about motion.+ Show more

Learning Objectives

• Explain how aerodynamic drag depends on velocity and opposes motion through air
• Describe how shape, frontal area, and airflow conditions affect net force on moving objects
• Apply aerodynamic concepts to real-world designs such as vehicles and wind turbines+ Show more

Learning Objectives

• Explain how applied force and displacement are linked to changes in mechanical energy during motion.
• Describe qualitative shifts between gravitational potential energy and kinetic energy in everyday situations.
• Predict the direction of energy change when forces do work or when friction brakes motion.

Learning Objectives

• Resolve the weight (gravity) of an object on an incline into perpendicular and parallel components.
• Explain how the parallel component and friction determine whether an object tends to slide down, stay at rest, or move up.
• Predict how slope steepness changes the size of the unbalanced force and the motion tendency.

Learning Objectives

• Distinguish mass from weight using correct scientific definitions.
• Use the relationship W = m × g to predict how weight changes with mass and gravitational acceleration.
• Explain why identical masses experience the same gravitational force per unit mass at the same location.+ Show more

Learning Objectives

• Explain how elastic forces in springs relate to deformation (displacement) for linear elastic behavior.
• Describe the direction of restorative force and how elastic components help achieve force balance in systems.
• Identify limits where proportional (linear) behavior may no longer hold for springs and elastic elements.

Learning Objectives

• Differentiate static electricity from current electricity by describing charge movement and effects.
• Explain how conductors, insulators, and electron transfer relate to electrostatic phenomena.
• Use charge interactions (attract/repel) to predict outcomes in simple scenarios.+ Show more

Learning Objectives

• Explain how exponential growth, logistic regulation, and cyclical fluctuations can appear in population data.
• Describe how carrying capacity, reproduction, predation, and time lags shape population trajectories.
• Use Alberta examples (snowshoe hare–lynx cycles and forest insect outbreaks) to connect theory to real ecosystems.+ Show more

Learning Objectives

• Explain the difference between criteria and constraints in engineering and science problems
• Identify measurable criteria and realistic constraints in a design scenario
• Use criteria and constraints to justify which solution is most feasible

Learning Objectives

• Explain how the rock cycle moves matter among the lithosphere, hydrosphere, and atmosphere
• Describe how energy changes during melting, cooling, weathering, and metamorphism
• Use the rock cycle to predict what processes could form igneous, sedimentary, and metamorphic rocks

Learning Objectives

• Differentiate renewable and nonrenewable resources and explain why their availability differs over time
• Describe how resource extraction and use can create environmental impacts such as pollution, habitat disruption, and land degradation
• Evaluate sustainability by comparing human demand with regeneration capacity and by considering mitigation strategies+ Show more

Learning Objectives

• Explain how predation, competition, mutualism, and parasitism affect individual survival and reproduction
• Connect species interactions to changes in population size over time
• Use evidence from interactions to predict how community structure can shift when the environment changes

Learning Objectives

• Identify independent, dependent, and controlled variables in a research scenario.
• Design a fair test by choosing appropriate control variables to reduce confounding factors.
• Select measurable data-collection methods and explain how replication improves reliability.

Learning Objectives

• Explain how scientific predictive models relate variables to expected outcomes.
• Identify the assumptions and variables in a model and describe what they let scientists predict.
• Use a model to make testable predictions and connect those predictions to data patterns.

Learning Objectives

• Explain how a claim, evidence, and reasoning work together in CER argumentation.
• Use appropriate scientific evidence (measurements, trends, comparisons) to support a claim.
• Write reasoning that connects evidence to a claim using scientific principles and clear cause logic.+ Show more

Learning Objectives

• Explain how runoff, erosion, transport, and deposition shape landforms such as valleys and deltas.
• Describe how groundwater influences features like springs and how weathering connects to water movement.
• Interpret how changes in gradient and drainage patterns affect where sediment accumulates.

Learning Objectives

• Identify common failure points in designs and explain how specific design features can lead to those failures.
• Describe how engineers balance trade-offs when improving a design (for example, strength vs. weight or safety vs. cost).
• Use evidence from testing or observations to revise a design while staying within constraints.

Learning Objectives

• Define engineering design success criteria and describe how they should be measurable.
• Identify common constraints in an engineering design problem and explain why they limit solutions.
• Write success criteria and constraints for a simple design challenge using precise language.

Learning Objectives

• Explain how particle motion at different temperatures affects gas pressure
• Use the particle model to describe how collisions create pressure on container walls
• Predict how changes in temperature affect pressure when volume is kept the same

Learning Objectives

• Explain how climate variability and change can shift precipitation patterns and affect water availability.
• Describe how changes in snowpack, evapotranspiration, and runoff timing influence floods, droughts, groundwater recharge, and reservoir storage.
• Connect land-use change and climate feedbacks to impacts on regional hydrology and aquatic ecosystems.+ Show more

Learning Objectives

• Describe the major freshwater and saline water reservoirs on Earth and compare their relative proportions.
• Explain how climate, topography, and geology influence where freshwater is stored and where it can be extracted.
• Analyze why access to potable water is uneven across regions and connect this to water security and transboundary concerns.

Learning Objectives

• Explain density as mass per unit volume and use SI units (kg/m³ and g/mL) to compare materials.
• Use density to predict whether objects float or sink in water and connect this to buoyancy.
• Describe relative density and specific gravity and relate them to the density of a reference material.

Learning Objectives

• Explain how cell models use structure to represent function of organelles and membrane systems.
• Use models to interpret membrane transport processes such as diffusion and osmosis.
• Relate organelle energy pathways (mitochondria and chloroplasts) to cell viability in models.+ Show more

Learning Objectives

• Explain how natural hazards (weather, geological, and other Earth processes) can pose risks to people and ecosystems
• Use NGSS-aligned reasoning to connect hazard characteristics and exposure to potential impacts
• Describe science-based strategies for preparing for, responding to, and mitigating natural hazards

Learning Objectives

• Analyze how air mass motion and pressure changes relate to temperature, humidity, wind, and precipitation
• Interpret observational datasets (surface pressure maps, temperature gradients, radiosonde profiles, and Doppler radar) to identify weather patterns
• Explain how frontogenesis and cyclogenesis can lead to frontal passages and severe thunderstorm development+ Show more

Learning Objectives

• Explain why scientists compare multiple lines of evidence when evaluating changes in global temperature over time.
• Distinguish between natural and anthropogenic climate drivers (greenhouse gases, volcanic aerosols, and solar variability).
• Describe how climate feedbacks can amplify or reduce warming and why models are used to test hypotheses.

Learning Objectives

• Explain how heritable variation allows natural selection to change traits in a population over generations
• Identify selective agents (environmental pressures) and describe how they affect survival and reproduction
• Use examples to connect phenotypic differences to population-level shifts in trait frequencies over time

Learning Objectives

• Describe the phases of the cell cycle, including interphase, mitosis, and cytokinesis
• Explain how DNA replication, chromosome segregation, and checkpoints help maintain genetic fidelity
• Compare the roles of cyclins and kinases in regulating cell cycle progression+ Show more

Learning Objectives

• Use multi-criteria decision methods (such as weighted scoring and Pareto comparisons) to compare competing design constraints.
• Estimate costs and benefits for design choices and justify which option best meets project goals.
• Run a basic sensitivity check by reasoning about how changes in assumptions could change the selected solution.+ Show more

Learning Objectives

• Explain how specialized tissues form organs and how organ structure supports organ function in major systems.
• Describe how the circulatory, respiratory, and digestive systems coordinate to move gases, nutrients, and wastes.
• Use the ideas of transport mechanisms and surface area to justify why organs work efficiently.

Learning Objectives

• Explain how conservation of mass applies to multi-step chemical reaction networks.
• Describe reversible reactions and dynamic equilibrium using forward and reverse microscopic changes.
• Interpret how equilibrium shifts can change observable properties without net atomic loss.

Learning Objectives

• Explain how feedback mechanisms maintain internal stability in the human body
• Identify the roles of sensors, integrating centers, and effectors in homeostasis
• Describe how cells (membranes and enzymes) support organism-level regulation

Learning Objectives

• Explain how innate and adaptive immune defenses work together to protect the body from pathogens.
• Describe the roles of phagocytes, antigen-presenting cells, and lymphocytes in immune responses.
• Use tissue-level and circulatory pathways to trace how immune cells coordinate during infection.

Learning Objectives

• Explain how selective permeability controls movement of substances across the cell membrane
• Describe the roles of membrane proteins (channels and pumps) and vesicular transport
• Connect membrane surface area and composition to diffusion rates and cellular signaling

Learning Objectives

• Explain how actin and myosin filaments work together during muscle contraction
• Describe how ATP and calcium ions regulate the power and timing of contraction
• Connect sarcomere organization to differences in contraction strength and speed

Learning Objectives

• Explain how electric forces and magnetic forces can be described using field interactions.
• Use Coulomb-like and distance-orientation ideas to predict how force magnitude changes with separation.
• Identify how charge, pole orientation, and current/circuit details affect the direction of forces.

Learning Objectives

• Interpret constant speed using distance–time graphs and the idea of equal distances in equal time intervals
• Calculate distance or time using the proportional relationship distance = speed × time
• Distinguish constant speed from changing speed by analyzing slope and identifying average vs. instantaneous speed

Learning Objectives

• Explain how equal-and-opposite interaction forces during a collision relate to changes in momentum
• Use conservation of linear momentum to analyze pre- and post-collision motion for systems of two objects
• Distinguish elastic from inelastic collisions using kinetic energy and momentum+ Show more

Learning Objectives

• Explain how mass affects an object's acceleration when the same net force is applied.
• Compare the motion of objects with different masses under identical pushes.
• Use qualitative inverse reasoning to connect mass and acceleration for a fixed net force.+ Show more

Learning Objectives

• Explain how multiple organs work together as an organ system to maintain internal balance
• Describe how communication signals help coordinate system-wide responses to changing conditions
• Connect how tissue interfaces and compatibility support efficient exchange of materials

Learning Objectives

• Explain mass conservation in chemical reactions in terms of conservation of atoms in a closed system.
• Use particulate-level models and symbolic equations to predict that total reactant mass equals total product mass.
• Connect macroscopic mass measurements to microscopic atom accounting and balanced stoichiometric relationships.

Learning Objectives

• Use particle models and symbolic formulas to represent the types and numbers of atoms in simple molecules (e.g., H2O, CO2).
• Differentiate discrete molecular units from extended ionic solids using particle model ideas and element/ion symbols (e.g., NaCl).
• Explain how bonding arrangements affect observable properties such as melting point and behavior of substances.

Learning Objectives

• Identify evidence that indicates a chemical change (color change, gas production, precipitate formation, temperature change).
• Explain how particle rearrangement leads to new substances with new properties.
• Interpret qualitative and quantitative data from reactions to distinguish chemical change from physical mixing.

Learning Objectives

• Explain how structural, behavioral, and physiological adaptations help organisms survive and reproduce in different environments
• Describe how natural selection can change trait frequencies across generations using variation, heritability, and selective pressures
• Contrast adaptation with acclimation in ecological contexts

Learning Objectives

• Explain how energy moves through conduction, convection, and radiation using grade-appropriate examples.
• Connect heat transfer to observable temperature changes and real-life thermal processes.
• Describe how energy transfer relates to phase changes and classify processes as endothermic or exothermic.

Learning Objectives

• Explain the steps of the scientific method and why they repeat when new evidence appears.
• Write a testable hypothesis, including a clear prediction based on measurable observations.
• Use operational definitions and controlled comparisons to make causal claims supported by evidence.

Learning Objectives

• Explain how earthquakes originate at faults due to stress buildup and sudden slip.
• Describe how P-waves and S-waves propagate through Earth and differ in motion and travel speed.
• Compare seismic magnitude and intensity and explain how epicenters are estimated.+ Show more