Grade 9 Worksheets

Learning Objectives

• Identify independent, dependent, and controlled variables in an investigation design.
• Explain how controls and safety procedures improve the reliability of experimental results.
• Use accurate measurement and data recording practices to support valid conclusions.

Learning Objectives

• Interpret graphs and tables by identifying variables, trends, and outliers.
• Evaluate how axis choices, scales, and labels affect the meaning readers can draw from data.
• Use evidence from numerical representations to support justified conclusions.

Learning Objectives

• Explain how uncertainty can be displayed on graphs using error bars, uncertainty bands, and annotated ranges in tables.
• Interpret whether differences between conditions are meaningful by comparing overlaps (or lack of overlap) in uncertainty.
• Use uncertainty reasoning to support or question conclusions about trends in scientific data.

Learning Objectives

• Identify common sources of uncertainty in scientific measurements and models (instrument limits, human judgment, environmental variation, and simplifications).
• Explain how uncertainty affects conclusions by relating uncertainty size to observed differences.
• Interpret uncertainty using measurement reasoning such as repeated trials, range/spread, and confidence in results.

Learning Objectives

• Explain how prototypes are used to collect evidence about solution performance.
• Identify measurable criteria for success and link them to observable results.
• Evaluate prototype outcomes by interpreting evidence from tests.

Learning Objectives

• Explain how solar radiation and geothermal heat enter and move through Earth systems.
• Describe conduction, convection, and radiation as mechanisms of energy transfer.
• Use energy gradients to predict how they drive atmospheric and ocean circulation.+ Show more

Learning Objectives

• Differentiate static friction and kinetic friction using how forces depend on the coefficient of friction and normal force.
• Describe how fluid drag depends on relative velocity, medium density, and cross-sectional area, including linear and quadratic regimes.
• Use resistive forces to explain net force changes and energy dissipation for real situations.

Learning Objectives

• Explain how divergent, convergent, and transform boundaries produce different surface features and hazards
• Describe how subduction, continental collision, and lithospheric motion lead to volcanism and mountain building
• Connect tectonic driving forces (mantle convection and slab pull) to plate movement and geological time-scale outcomes+ Show more

Learning Objectives

• Explain how conduction, convection, and radiation transfer thermal energy in everyday situations.
• Use particle ideas and fluid motion to describe conduction and convection, respectively.
• Describe why radiation can transfer heat through space and does not require a medium.+ Show more

Learning Objectives

• Explain how balanced chemical equations reflect the conservation of atoms and mass
• Use coefficients and subscripts to represent reactants and products in symbolic form
• Determine missing coefficients by counting atoms on both sides of a chemical equation+ Show more

Learning Objectives

• Explain how water moves among atmospheric, surface, and subsurface reservoirs through evaporation, condensation, precipitation, infiltration, runoff, and groundwater flow.
• Describe how residence time and fluxes influence water availability in different reservoirs.
• Evaluate how watershed characteristics (such as porosity and permeability) affect how precipitation is partitioned into infiltration versus runoff.+ Show more

Learning Objectives

• Differentiate physical changes from chemical changes by using evidence from observations.
• Identify physical properties and chemical properties and connect them to real-world examples.
• Explain how atoms and bonds relate to chemical change, while state/form changes relate to physical change.

Learning Objectives

• Define chemical change as a process that forms new substances with different properties and different particle composition.
• Use observable indicators (temperature change, gas production, precipitate formation, and persistent color change) to identify likely chemical reactions.
• Distinguish chemical evidence from physical changes by considering whether new substances are produced.+ Show more

Learning Objectives

• Explain that compounds are made of two or more elements combined in fixed ratios and represented by chemical formulas.
• Describe how ionic and covalent bonding can help explain macroscopic properties of compounds (e.g., melting point, conductivity).
• State the law of definite composition and contrast compound formation with variable composition of mixtures.

Learning Objectives

• Explain how acceleration depends on net force (direction and magnitude).
• Use Newton’s second law to predict how mass affects acceleration.
• Apply force-combination ideas (including friction) to real-world motion scenarios.

Learning Objectives

• State the principle of conservation of mass in a closed system during chemical reactions
• Use mass accounting to predict and explain how total reactant mass relates to total product mass
• Distinguish true mass conservation from apparent mass changes caused by gas exchange or leakage

Learning Objectives

• Explain how diffusion at the alveolar–capillary interface depends on partial pressure gradients, surface area, and membrane thickness
• Describe how ventilation mechanics and anatomical dead space affect alveolar ventilation and gas exchange
• Evaluate how haemoglobin affinity and ventilation–perfusion matching influence oxygen uptake and carbon dioxide removal

Learning Objectives

• Explain the relationship between wave speed, frequency, and wavelength in a given medium
• Use the equation v = fλ to predict how wavelength changes when frequency changes (and speed stays constant)
• Apply wave speed relations to real-world examples involving pulses and periodic signals

Learning Objectives

• Explain how gravity provides the centripetal force that keeps planets and moons in curved orbits
• Describe how orbital speed and orbital period relate to distance from the central body
• Use the idea of periodic motion to interpret predictable patterns in the night sky

Learning Objectives

• Explain how friction and drag oppose relative motion and how they affect acceleration
• Describe how friction depends on normal force and surface conditions
• Describe how drag depends on speed and why it increases at higher speeds+ Show more

Learning Objectives

• Explain how historians construct reasoned interpretations using evidence from multiple sources
• Identify bias and perspective in historical narratives, including Indigenous oral histories and colonial documents
• Compare conflicting claims and synthesize information to form a balanced historical interpretation+ Show more

Learning Objectives

• Explain how colonization created both cooperation and conflict between Indigenous peoples and colonial groups.
• Identify examples of continuity and change in Indigenous resiliency, adaptation, and resistance.
• Analyze how colonial policies aimed to assimilate or marginalize Indigenous peoples and how communities responded.

Learning Objectives

• Explain how economic activities influenced where colonial communities formed in Canada
• Describe how transportation routes affected the spatial distribution of settlements
• Analyze how government policies shaped territorial control and impacted Indigenous populations+ Show more

Learning Objectives

• Describe ATP’s structure and explain how phosphate bonds relate to energy storage
• Explain how ATP hydrolysis releases energy and how that energy powers cellular work
• Analyze how phosphorylation regenerates ATP and couples energy-yielding and energy-consuming processes

Learning Objectives

• Identify the six classical simple machines and describe how each can change force and/or direction.
• Explain the idea of mechanical advantage using input force and output force, including the role of ideal versus real conditions.
• Analyze trade-offs between force reduction and distance or direction changes, especially when friction is present.

Learning Objectives

• Use the dot-product idea of work, W = Fd cosθ, to calculate work for forces at an angle.
• Distinguish between work done by constant forces and work done by variable forces.
• Compute work for variable forces by interpreting and approximating the area under a force–distance curve.+ Show more

Learning Objectives

• Distinguish primary succession from secondary succession and explain what triggers each type.
• Explain how species turnover and resource availability can change habitat conditions over time.
• Use ecological succession concepts to interpret how disturbance regimes and species traits influence long-term ecosystem trajectories.

Learning Objectives

• Identify major physical geographic features (mountains, valleys, deserts, and rivers) and describe their key characteristics.
• Explain how physical features influence human settlement, agriculture, and transportation.
• Interpret how the spatial distribution of landforms can contribute to regional climate and resource patterns.

Learning Objectives

• Explain how sustainable urban planning can reduce environmental harm caused by rapid city growth
• Analyze how transportation, green spaces, and eco-friendly policies affect urban sustainability
• Evaluate sustainable urban development by considering Indigenous land-management perspectives and environmental ethics

Learning Objectives

• Explain how environmental exposures and lifestyle choices can contribute to chronic disease using mechanistic and epidemiological perspectives.
• Describe dose–response relationships and how vulnerability factors influence health outcomes.
• Identify examples of how air, water, chemical toxicants, occupational hazards, and dietary patterns can affect cellular and organ-system functions.

Learning Objectives

• Explain how crossing over during meiosis increases genetic variation.
• Describe how independent assortment changes which chromosomes end up in gametes.
• Connect meiosis and fertilization to why siblings can show different observable traits.

Learning Objectives

• Explain how the amphipathic phospholipids in the cell membrane form a selectively permeable bilayer
• Describe how integral, peripheral proteins, cholesterol, and carbohydrate chains contribute to membrane function
• Use the fluid mosaic model to predict how membrane components move and how permeability is regulated

Learning Objectives

• Explain power as the rate of energy transfer or work per unit time using average and instantaneous ideas
• Identify and use the correct units for power (watts) and energy (joules) in calculations and comparisons
• Calculate mechanical efficiency and interpret how friction and heat reduce efficiency+ Show more

Learning Objectives

• Compare physical and chemical changes by describing how energy transfer relates to what happens to particles and bonds.
• Explain endothermic and exothermic processes using the direction of energy flow and the resulting temperature changes.
• Use system–surroundings thinking to predict whether energy is absorbed or released during a change.

Learning Objectives

• Explain how geographic distribution influences access to natural resources and development decisions.
• Describe how environmental impact and economic needs shape sustainable resource management strategies.
• Evaluate regional approaches to conservation, extraction, and renewable resource use.

Learning Objectives

• Describe the purpose of biological classification and how it supports communication about biodiversity
• Explain how traditional taxonomic ranks and binomial nomenclature help organize organisms
• Compare traditional classification with modern approaches that use evolutionary relationships and clades+ Show more

Learning Objectives

• Explain how variation, inheritance, and differential survival/reproduction lead to natural selection.
• Use the idea of fitness to predict how trait frequencies may change over generations.
• Distinguish natural selection from individual “life changes” and connect it to adaptation.

Learning Objectives

• Interpret acceleration from speed–time and distance–time data using graph shape and slope changes
• Determine whether acceleration is roughly constant or changing by analyzing patterns across equal time intervals
• Relate increases and decreases in speed to the direction (sign) of acceleration relative to motion

Learning Objectives

• Evaluate how lifestyle and environmental factors (nutrition, physical activity, tobacco exposure, pollutant inhalation, and sleep) can affect human health at cellular and system levels.
• Explain major physiological mechanisms such as oxidative stress, chronic inflammation, disrupted membrane transport, and altered hormonal signaling.
• Interpret epidemiological correlations by using biological reasoning to distinguish likely causation from association.

Learning Objectives

• Understand how climate models simulate Earth's energy balance and atmospheric circulation.
• Identify different scenarios of greenhouse gas emissions and their projected impacts.
• Explain feedback mechanisms such as water vapor, ice cover, and clouds in climate projections.+ Show more

Learning Objectives

• Understand the concept of coupled quantitative models in environmental systems.
• Identify the interactions among geosphere, hydrosphere, atmosphere, and biosphere in modeling scenarios.
• Evaluate the importance of model structure, parameter sensitivity, and uncertainty propagation.+ Show more

Learning Objectives

• Explain how the sun's uneven heating drives weather and atmospheric circulation.
• Describe the role of the hydrosphere in water vapor and cloud formation.
• Analyze how temperature, pressure, and energy transfer influence local weather patterns.+ Show more

Learning Objectives

• Describe how water, carbon, and nutrients cycle through Earth's systems.
• Explain the processes of evaporation, condensation, and precipitation in water cycling.
• Identify the interactions among atmosphere, oceans, organisms, and rocks in nutrient cycles.+ Show more

Learning Objectives

• Understand how ecological factors influence biodiversity within a community.
• Identify the roles of limiting resources and biotic interactions in population dynamics.
• Describe how changes in environmental factors can affect community composition.+ Show more

Learning Objectives

• Understand the relationships among displacement, velocity, and acceleration in straight-line motion.
• Interpret position–time and velocity–time graphs to analyze motion.
• Apply constant-acceleration equations to solve kinematic problems.+ Show more

Learning Objectives

• Understand how molar ratios relate reactants and products in balanced chemical equations.
• Apply conservation of mass to verify reaction equations and predict product quantities.
• Calculate limiting reagents and theoretical yields in chemical reactions.+ Show more

Learning Objectives

• Understand the molecular mechanisms of DNA replication, transcription, RNA processing, and translation.
• Link sequence variations and mutations to changes in gene expression and protein function.
• Use molecular models and sequence reasoning to predict phenotypic consequences of allelic changes.+ Show more

Learning Objectives

• Identify different types of models used in scientific representation, including mathematical, graphical, schematic, and computational models.
• Understand the criteria for selecting appropriate models based on fidelity, simplicity, and predictive ability.
• Explain how mapping between model components and measurable observables aids interpretation.+ Show more