Grade 8 Worksheets

Learning Objectives

• Explain how surface water and groundwater exchange occurs along streams through gaining and losing reaches and baseflow.
• Analyze how permeability, hydraulic gradients, and recharge zones influence exchange rates.
• Describe how river stage and seasonal variability change exchange and affect nutrient cycling, contaminant transfer, and habitats.

Learning Objectives

• Explain how gear ratios affect torque and angular velocity in simple and compound gear trains.
• Determine direction changes and overall gear ratio in gear trains that use spur gears and idler gears.
• Use tooth counts to predict mechanical advantage and describe speed–torque trade-offs.

Learning Objectives

• Explain how pollution alters ecosystem chemistry and disrupts nutrient cycles.
• Describe how excess nutrients can lead to eutrophication and algal blooms.
• Identify how persistent contaminants bioaccumulate through food webs and affect organisms.+ Show more

Learning Objectives

• Differentiate physical changes from chemical changes using evidence such as new substances and permanent color change.
• Explain why some changes are reversible (state or form changes) while others are not (atoms rearrange into new substances).
• Connect phase changes like melting/freezing and boiling/condensation to the idea of reversibility under different conditions.

Learning Objectives

• Explain how genes and alleles influence inherited traits in offspring.
• Differentiate dominant and recessive alleles using allele-pair outcomes.
• Use evidence from observed variation to justify that inherited factors affect survival and reproduction.

Learning Objectives

• Explain how porosity and permeability affect groundwater storage and movement through aquifers.
• Distinguish between confined and unconfined aquifers and relate them to hydraulic head and water table concepts.
• Describe recharge and discharge zones and connect groundwater flow to baseflow and well yield.+ Show more

Learning Objectives

• Explain how internal structures in living organisms help with survival functions such as movement of materials, gas exchange, and digestion.
• Describe how external structures (like beaks, teeth, shells, or leaves) relate to feeding and protection.
• Use structure–function relationships to predict how an organism meets its needs in different environments.

Learning Objectives

• Explain how submarine ballast tanks change buoyancy by adjusting displaced volume and internal mass
• Identify conditions for neutral buoyancy and describe what happens when water is taken in or ejected
• Use simple calculations involving tank volume, fluid density, and net buoyant force to predict buoyancy changes+ Show more

Learning Objectives

• Explain how biotic interactions (predation, competition, disease, and mutualism) influence population sizes.
• Describe how changes in populations can affect energy flow and matter cycling in an ecosystem.
• Use evidence from a text to identify main ideas and make claims supported by ecological concepts.

Learning Objectives

• Explain how optimization balances performance goals with constraints to choose the best solution among alternatives.
• Identify criteria and constraints and describe how tradeoffs affect engineering and design decisions.
• Use evidence to justify why one design is superior for a specific real-world situation.

Learning Objectives

• Explain how gravitational potential energy and kinetic energy change as an object moves up or down under gravity.
• Use conservation of mechanical energy ideas to predict how speed changes at different heights.
• Connect a roller coaster example to energy transfers and speed without needing to track moment-by-moment forces.

Learning Objectives

• Explain how earthquake locations form belts that relate to tectonic plate boundaries
• Describe how seismic wave observations provide indirect evidence about Earth’s internal structure
• Use evidence from seismic timing and wave behavior to connect tectonic motion to patterns of earthquakes and volcanic activity

Learning Objectives

• Identify multiple lines of evidence that support the idea that Earth’s lithospheric plates have moved over long periods of time.
• Explain how geologic patterns such as rock age, mountain belt alignment, and seafloor features relate to past plate motion.
• Interpret statements about plate boundaries and Earth history as true or false based on scientific evidence.

Learning Objectives

• Distinguish physical changes from chemical changes using observable evidence
• Identify common evidence of chemical reactions such as gas formation, precipitate, temperature change, and color change
• Explain why irreversible changes usually indicate a chemical change

Learning Objectives

• Explain the purpose of major drinking-water and wastewater treatment stages (coagulation, flocculation, sedimentation, filtration, and disinfection).
• Describe how treatment processes remove suspended solids, pathogens, and dissolved contaminants.
• Compare tertiary approaches such as biological nutrient removal and engineered wetlands.+ Show more

Learning Objectives

• Understand the principles of energy conservation in physical systems.
• Identify examples of energy transfer and transformation during motion and collisions.
• Analyze how work and heat contribute to energy changes within a system.+ Show more

Learning Objectives

• Explain how friction depends on surface type and normal force and how it affects motion and acceleration
• Describe how fluid drag depends on speed, shape, and fluid properties
• Use qualitative reasoning to predict how increasing resistive forces changes acceleration and steady motion

Learning Objectives

• Explain how diffusion is used in gas exchange between an organism and its environment
• Identify how structure (surface area, thin/wet surfaces, and air spaces) supports rapid oxygen and carbon dioxide transfer
• Compare gas exchange in lungs (alveoli) and leaves (stomata and spongy mesophyll) using structure–function principles

Learning Objectives

• Explain how actin and myosin interact to produce muscle contraction
• Describe the role of ATP and calcium ions in regulating contraction
• Relate sarcomere structure to the strength and speed of muscle movement+ Show more

Learning Objectives

• Describe solids, liquids, and gases using the particle model (spacing and motion).
• Explain how temperature relates to particle motion and state changes.
• Predict how volume and shape differ across states of matter.

Learning Objectives

• Distinguish between an observation, a testable claim, and a hypothesis
• Identify independent and dependent variables in a scientific claim
• Create a hypothesis that includes a clear variable relationship and realistic expected pattern+ Show more

Learning Objectives

• Explain what a scientific predictive model is and how it links variables to observed outcomes
• Identify the assumptions and variables in a given scientific model
• Use a model to make testable predictions and interpret how new data affects the model+ Show more

Learning Objectives

• Explain how different species interactions (predation, competition, mutualism, and parasitism) affect survival and reproduction
• Analyze how interactions influence population size and community structure over time
• Identify evidence of species interactions from descriptions and scientific scenarios+ Show more

Learning Objectives

• Explain how heredity contributes to variation in offspring
• Describe how recombination and mutations create genetic differences
• Use evidence from families and populations to support claims about inherited variation+ Show more

Learning Objectives

• Explain how matter cycles among living and nonliving components in an ecosystem.
• Describe how decomposition, gas exchange, and soil nutrient transformations return elements to the environment.
• Use the idea of atomic “recycling” to explain ecosystem persistence over long periods of time.

Learning Objectives

• Explain how inherited variation can lead to adaptation when environmental pressures change
• Describe how natural selection can change allele/trait frequencies in a population over generations
• Use examples to distinguish abiotic and biotic factors that influence adaptation+ Show more

Learning Objectives

• Explain how aerodynamic drag opposes motion and how it affects net force and acceleration
• Identify how shape, frontal area, and flow conditions influence the size of drag
• Apply aerodynamic drag ideas to real-world technologies such as vehicles and wind turbines

Learning Objectives

• Distinguish mass from weight using the role of matter and gravity
• Use the relationship W = m × g to predict how weight changes with gravitational acceleration
• Explain real-world uses of mass and weight measurements in engineering and agriculture

Learning Objectives

• Understand how heritable variation influences natural selection.
• Identify the roles of selective agents in shaping populations.
• Analyze examples like industrial melanism, antibiotic resistance, and beak variation.+ Show more

Learning Objectives

• Explain how predator–prey interactions can regulate population sizes and affect community structure
• Describe how behavioral adaptations and refuges can reduce predation risk for prey
• Interpret factors such as functional responses and compensatory mechanisms in predator–prey systems+ Show more

Learning Objectives

• Understand the principles of conduction, convection, and radiation in heat transfer.
• Identify materials and strategies that maximize or minimize thermal energy transfer.
• Describe how material properties and system geometry influence heat flow in practical applications.+ Show more

Learning Objectives

• Explain the relative positions and motions of the Earth, Sun, and Moon that cause lunar phases, eclipses, and seasonal changes.
• Describe the concepts of axial tilt, orbital geometry, and timing of cycles like the synodic month and seasons.
• Link observable sky patterns and calendar cycles to the Earth's and Moon's motions and positions.

Learning Objectives

• Understand the molecular basis of inheritance and how DNA sequences influence traits.
• Explain gene structure, transcription, translation, and how mutations affect proteins.
• Identify examples of genetic variation and how heritable changes propagate across generations.

Learning Objectives

• Understand the relationship between energy transfer, material type, and temperature change.
• Explain the concept of specific heat capacity and how it affects temperature responses.
• Relate microscopic particle energy to macroscopic temperature measurements.+ Show more

Learning Objectives

• Explain how voltage, current, and resistance are measured and what each instrument is used for.
• Choose correct meter ranges and connection methods for circuits to obtain accurate readings.
• Describe how meter impedance and circuit setup can affect measured values.+ Show more

Learning Objectives

• Understand the relationship between net force, mass, and acceleration through quantitative analysis.
• Apply mathematical models to predict how changes in force and mass affect acceleration.
• Interpret graphical representations and numerical data related to force and motion.+ Show more

Learning Objectives

• Explain how energy exchange and particle motion cause phase transitions between solid, liquid, and gas.
• Describe melting, freezing, vaporization, and condensation and identify them in real-life Alberta examples.
• Predict how changing temperature or pressure can lead to a reversible change in state of matter.+ Show more

Learning Objectives

• Understand scientific methods used in monitoring ecosystems and water resources.
• Identify indicators of ecological health and thresholds for intervention.
• Analyze measurement protocols and evaluate the effectiveness of mitigation strategies.+ Show more

Learning Objectives

• Describe the processes that generate new species and lead to extinction.
• Explain how geographic isolation contributes to allopatric speciation.
• Identify evidence from fossils and genetics that document diversification and mass extinctions.+ Show more

Learning Objectives

• Explain how matter cycles between living organisms and the environment through processes like photosynthesis, respiration, and decomposition.
• Trace the movement of atoms, such as carbon and water, through different reservoirs within ecosystems.
• Understand the conservation of mass in biological processes and distinguish among molecular forms of matter.+ Show more

Learning Objectives

• Understand the principles of electric and magnetic forces and their interactions.
• Identify factors affecting the strength and direction of electric and magnetic forces.
• Compare electric and magnetic field interactions and their real-world examples.+ Show more

Learning Objectives

• Explain how mass affects acceleration when a net force is applied to an object.
• Use qualitative proportional reasoning to describe how acceleration changes as mass changes under the same net force.
• Interpret real-world examples (skateboard vs. cart) to predict motion changes based on mass and net force.

Learning Objectives

• Resolve the weight of an object on an incline into perpendicular and parallel components
• Explain how slope steepness changes the downslope (parallel) component and the unbalanced force
• Compare frictional resistance with the downslope component to predict motion tendency+ Show more

Learning Objectives

• Understand the different drivers influencing global temperature changes over time.
• Analyze evidence from paleoclimate and modern records to attribute causes of climate change.
• Evaluate multiple lines of scientific evidence to distinguish natural and anthropogenic influences.+ Show more

Learning Objectives

• Explain how criteria define measurable success in engineering and scientific design
• Identify common constraint types such as limits on time, cost, size, mass, safety, and available technology
• Use criteria and constraints to compare design options and justify a realistic choice

Learning Objectives

• Explain how equal and opposite forces produce zero net force and no change in motion
• Differentiate static equilibrium from dynamic equilibrium using real-life examples
• Predict whether an object will remain at rest or move at constant velocity based on balanced vs. unbalanced forces+ Show more

Learning Objectives

• Explain how energy enters ecosystems from primary sources such as sunlight and chemical energy
• Describe how energy transfers among producers, consumers, decomposers, and detritivores
• Identify reasons energy decreases between trophic levels and how matter is recycled in food webs+ Show more

Learning Objectives

• Differentiate kinetic energy and potential energy and identify examples of each in everyday situations
• Explain how energy transfers occur when forces do work and how mechanical energy can transform into thermal energy
• Use evidence from scenarios to predict how energy changes as an object moves or its position changes+ Show more