Grade 8 Science Worksheets

Learning Objectives

• Interpret distance–time and velocity–time graphs by relating slope to speed/acceleration and area to displacement
• Extract acceleration and speed information from linear and non-linear motion graphs
• Compare different motion profiles qualitatively using features of their graphs

Learning Objectives

• Explain how simple machines (lever, pulley, inclined plane, wheel and axle, wedge, and screw) modify force direction and/or magnitude.
• Compare single-pulley and multi-pulley setups using qualitative mechanical advantage and effort-distance trade-offs.
• Describe practical trade-offs among input force, input distance, and motion when using different machine arrangements.

Learning Objectives

• Draw and interpret free-body diagrams by representing gravitational, normal, frictional, and applied forces with properly directed arrows.
• Use vector reasoning to determine the net force direction and explain what motion is most likely.
• Identify common mistakes in free-body diagrams and revise diagrams to include only forces acting on the chosen object.

Learning Objectives

• Classify materials as pure substances (elements or compounds) or mixtures based on composition and bonding.
• Describe how physical separation methods apply to mixtures versus pure substances.
• Use classification to select appropriate analysis approaches for environmental and industrial samples.

Learning Objectives

• Describe how models represent matter and energy movement using diagrams, flow charts, and quantitative balances.
• Interpret model outputs for trophic levels and nutrient pools in ecosystems such as wetlands, forests, and grasslands.
• Identify common assumptions and limitations in ecological models and explain how they affect results.+ Show more

Learning Objectives

• Explain how abiotic and biotic factors interact to change population size and distribution
• Describe how birth, death, immigration, and emigration influence local population trajectories
• Use examples from Alberta to connect density dependence and seasonal climate to population dynamics

Learning Objectives

• Explain how green infrastructure manages stormwater using nature-based and engineered features.
• Identify key functions of green infrastructure, including infiltration, runoff slowing, and pollutant capture.
• Describe design parameters (soil media, slope, vegetation, storage volume) that influence effectiveness.+ Show more

Learning Objectives

• Explain how integrated water resources management balances municipal, agricultural, and ecological water needs.
• Describe how monitoring, adaptive management, and stakeholder coordination improve water decisions over time.
• Identify examples of governance instruments (e.g., source-protection zones, licensing, watershed-scale planning) and how scientific knowledge informs them.

Learning Objectives

• Describe the main stages of drinking-water and wastewater treatment and the purpose of each stage
• Explain how suspended solids, pathogens, and dissolved contaminants can be removed using different mechanisms
• Compare secondary and tertiary treatment approaches, including nutrient removal and engineered wetlands+ Show more

Learning Objectives

• Calculate density using mass and volume, including units and significant figures.
• Use displacement and overflow methods to measure the volume of irregular solids.
• Explain how precision, measurement uncertainty, and trapped air can cause discrepancies in measured density.

Learning Objectives

• Explain how hydrostatic pressure increases with depth and how that creates forces on submerged surfaces.
• Determine the net hydrostatic force and its line of action (centre of pressure) for simple depth-pressure relationships.
• Use hydrostatic force concepts to predict effects on dam faces and bulkheads and suggest anchoring/material strategies.

Learning Objectives

• Explain how meiosis creates genetic variation through recombination and random assortment
• Describe how gametes formed by meiosis contribute to differences among offspring
• Connect genetic variation to the raw material needed for evolution over time

Learning Objectives

• Explain how organ systems work together to support survival needs such as nutrition, gas exchange, water balance, and movement.
• Describe how the structure of an organ supports its function in maintaining conditions for metabolism and growth.
• Use evidence from examples to predict how disruptions in one system can affect overall survival.

Learning Objectives

• Explain how matter moves through ecosystems by cycling among living and nonliving components
• Describe how decomposition, gas exchange, and soil nutrient transformation return atoms to the environment
• Use the idea of conservation of matter to explain why atoms reappear in new organisms over time

Learning Objectives

• Distinguish between a testable claim, a hypothesis, and an observation in science investigations.
• Identify the independent variable, dependent variable, and controlled variables in a scenario.
• Evaluate whether a hypothesis includes clear variables and realistic expectations based on data patterns.+ Show more

Learning Objectives

• Explain how forces can change an object's motion by comparing push and pull interactions.
• Determine how balanced and unbalanced forces affect an object's net force and velocity.
• Use the concept of net force to predict whether an object speeds up, slows down, or changes direction.

Learning Objectives

• Describe how particles are arranged and how they move in solids, liquids, and gases.
• Explain how temperature relates to particle motion and energy.
• Predict what happens to particle spacing and motion during state changes.+ Show more

Learning Objectives

• Explain how multiple forces combine to produce a net force and predict the direction of acceleration.
• Distinguish between unbalanced forces (acceleration occurs) and balanced forces (motion may remain the same).
• Use weight and friction as real-world examples to describe how forces change an object’s motion.

Learning Objectives

• Describe the main components of the water cycle (atmosphere, surface water, and groundwater) in terms of moving water.
• Explain how key processes—evaporation, condensation, precipitation, infiltration, runoff, and storage—transfer water between reservoirs.
• Use a simple model to predict how changes in one part of the water cycle affect other parts.

Learning Objectives

• Explain how igneous, sedimentary, and metamorphic rocks form under different Earth conditions
• Describe how minerals’ physical properties relate to composition
• Use the rock record to connect tectonic activity with long-term changes on Earth

Learning Objectives

• Explain how technology choices affect people and the environment beyond immediate performance
• Evaluate trade-offs in a technology’s life cycle, including energy sources, materials, durability, and disposal
• Use evidence and criteria to judge whether a solution is more responsible overall

Learning Objectives

• Explain how impacts can occur before a product works, during use, and after disposal using a life-cycle perspective.
• Identify trade-offs between stages (materials/manufacturing vs. maintenance vs. end-of-life) when comparing design options.
• Use system-level thinking to justify the “best” option under given constraints (cost, energy, waste, and feasibility).

Learning Objectives

• Explain how advection, dispersion, and diffusion move contaminants through surface and subsurface water.
• Describe how sorption and biodegradation/redox reactions can reduce contaminant concentrations over time.
• Predict how contaminant plumes form and migrate using ideas about preferential flow and aquifer transport.+ Show more

Learning Objectives

• Explain the conservation of mass in closed systems using particle/atom language.
• Use balanced chemical equations to predict that reactant mass equals product mass.
• Connect mass measurements to moles and particle counts to check conservation relationships.

Learning Objectives

• Interpret distance-time graphs to determine when an object is at rest, moving, or changing speed.
• Calculate average speed from a distance-time graph by using distance change over time change between two points.
• Analyze piecewise motion by comparing speeds across different graph segments.

Learning Objectives

• Explain how net force and mass affect acceleration using qualitative proportional reasoning.
• Identify how changing force or changing mass changes the motion of an object.
• Use Newton’s 2nd law ideas (in words) to reason about everyday examples such as pushing carts.

Learning Objectives

• Describe how kinetic energy depends on mass and speed and how potential energy depends on position.
• Interpret graphs that show kinetic energy as a function of mass and as a function of the square of speed.
• Explain energy transfer and conservation between kinetic and potential energy, including the role of friction.

Learning Objectives

• Describe solids, liquids, gases, and plasma using the kinetic particle model.
• Explain how thermal energy changes cause phase changes such as melting, boiling, condensation, and sublimation.
• Connect energy changes and particle motion to phase diagrams and the idea of latent heat.

Learning Objectives

• Describe voltage as electric potential difference and explain how it relates to energy per unit charge.
• Use reference points and polarity (+/−) to determine voltage between two points in a circuit.
• Predict how voltage affects current when resistance is constant.

Learning Objectives

• Explain work as the component of force in the direction of displacement and calculate work for constant and variable forces.
• Use the work–energy theorem to relate net work to changes in kinetic energy.
• Apply energy bookkeeping to connected systems involving lifting, springs, and friction.

Learning Objectives

• Explain how energy is transferred and transformed during ordinary physical processes
• Use conservation of energy to account for changes in kinetic, thermal, and other forms of energy
• Identify evidence of energy transfer (e.g., friction warming surfaces) in real-world scenarios+ Show more

Learning Objectives

• Explain how natural disturbances and long-term environmental changes can alter ecosystem conditions.
• Describe how species interactions and available resources influence ecosystem change and succession.
• Identify how human activities can accelerate or redirect ecosystem shifts.

Learning Objectives

• Explain what balanced forces are and how they affect net force and motion
• Distinguish between static equilibrium and dynamic equilibrium using examples
• Use force diagrams and everyday situations to decide whether an object is experiencing balanced or unbalanced forces

Learning Objectives

• Interpret slopes, areas under curves, and changes over time from science graphs to explain physical phenomena.
• Translate information between equations, data tables, and graphs to support quantitative reasoning.
• Evaluate limitations of graphical inference and choose appropriate graph domains for valid conclusions.

Learning Objectives

• Explain how kinetic energy changes correspond to energy transferred to or from an object in a closed system
• Use conservation of energy to account for energy in elastic and inelastic collisions and during frictional heating
• Track energy conversions among chemical, electrical, and mechanical forms

Learning Objectives

• Explain how forces during a collision relate to changes in momentum (impulse).
• Distinguish elastic and inelastic collisions using conservation of momentum and kinetic energy.
• Predict motion before and after a collision using conservation of linear momentum.

Learning Objectives

• Explain how gravitational force depends on mass and separation distance using the inverse-square relationship.
• Describe how gravity produces orbital motion and tidal effects in the Earth–Moon system.
• Use gravitational ideas to make comparisons about attraction strength and motion outcomes.

Learning Objectives

• Explain how energy transferred during heating or cooling changes the average kinetic energy of particles as measured by temperature
• Use specific heat capacity to compare temperature changes in different materials for the same energy input
• Apply conservation of energy in calorimetry to reason about heat gained and heat lost

Learning Objectives

• Describe how gravitational and elastic potential energy depend on position or deformation in a system.
• Explain how magnetic interactions change stored energy when magnets’ relative positions change.
• Connect changes in configuration to the amount of energy that is available to convert during motion or interaction.

Learning Objectives

• Explain how kinetic energy depends on mass and speed and how potential energy depends on position.
• Interpret graphs that show relationships between kinetic energy and mass or kinetic energy and the square of speed.
• Apply conservation of mechanical energy to analyze energy transfer between kinetic and potential forms, including the effects of friction.

Learning Objectives

• Explain how net force relates to acceleration and how mass affects acceleration using proportional reasoning
• Use a simple model to predict acceleration from given net force and mass values
• Interpret how friction changes the net force and therefore the acceleration

Learning Objectives

• Explain mass conservation in chemical reactions by tracking atoms in a closed system.
• Use particulate models and balanced chemical equations to connect microscopic atom conservation to macroscopic mass measurements.
• Predict outcomes in sealed-container reactions by accounting for all matter as reactants and products.

Learning Objectives

• Interpret solar system scale relationships using quantitative data such as diameters, distances, and orbital periods.
• Use astronomical units (AU) and relative scaling to compare the Sun, planets, dwarf planets, and major moons.
• Explain patterns across the solar system by identifying orders of magnitude in sizes and interplanetary distances.

Learning Objectives

• Explain how natural resources can be processed and transformed into synthetic materials
• Describe how molecular structure and composition affect material properties such as strength and conductivity
• Compare natural materials and synthetic materials, including environmental and resource considerations

Learning Objectives

• Explain how the Earth–Sun–Moon system creates cyclic phenomena such as lunar phases, eclipses, and seasons
• Use relative positions and motions to predict when phases and eclipses occur
• Describe how axial tilt and orbital geometry affect the timing and intensity of seasonal sunlight

Learning Objectives

• Explain how particle motion relates to temperature and states of matter during heating and cooling.
• Use particle diagrams and temperature–phase behavior to describe melting, boiling, and condensation.
• Distinguish reversible physical state changes from changes involving chemical composition.

Learning Objectives

• Identify evidence of chemical change by linking observable properties (color change, gas production, precipitate formation, temperature change) to what happens at the particle level.
• Analyze and compare qualitative and quantitative data from reactions to decide whether a process is a chemical reaction or physical mixing.
• Use reaction evidence to explain common examples such as corrosion, combustion, and acid-base interactions.

Learning Objectives

• Use particle models and chemical formulas to represent the relative numbers and types of atoms in simple molecules (e.g., H2O, CO2).
• Differentiate discrete molecular units from continuous extended solids using structural models (including ionic lattices).
• Relate observable properties (such as conductivity for ionic substances) to microscopic bonding arrangements and structure.