Grade 9 Science Worksheets

Learning Objectives

• Explain ionic, covalent, and metallic bonding using electron transfer, electron sharing, and electron mobility models.
• Use bond energy and polarity ideas to predict relative stability, melting point, and conductivity of substances.
• Interpret Lewis structures and connect atomic electron configurations to molecular geometry and intermolecular attractions.

Learning Objectives

• Explain how bandwidth, sampling criteria, and signal-to-noise ratio affect communication performance
• Compare digital and analog transmission by using quantitative ideas like bit error rate and channel capacity
• Evaluate how modulation, coding, and error-correcting techniques improve reliability under noise and interference+ Show more

Learning Objectives

• Differentiate homogeneous solutions from heterogeneous mixtures based on uniformity and particle distribution.
• Identify the roles of solute and solvent in solutions and describe how concentration relates to appearance and behavior.
• Select appropriate physical separation methods using differences in physical properties such as size, solubility, or boiling point.

Learning Objectives

• Explain the particulate (particle) model of matter using particle motion, spacing, and collisions
• Use the particulate model to predict diffusion, pressure, and temperature changes in solids, liquids, and gases
• Relate everyday and Alberta examples (e.g., salt on roads, odour spread from farms) to particle-level processes

Learning Objectives

• Explain how current and voltage behave in series and parallel sections of mixed circuits
• Simplify mixed circuits by finding equivalent resistance step-by-step
• Use Ohm’s law and branch reasoning to determine current and voltage in circuit sections+ Show more

Learning Objectives

• Explain how wind and solar variability affects electrical grid reliability
• Describe dispatch coordination and the role of grid operators when renewable output changes
• Evaluate why energy storage and demand-side measures help balance renewable intermittency+ Show more

Learning Objectives

• Explain the relationship between power, energy transfer, and time using real-world examples.
• Calculate or interpret efficiency as the fraction of input energy converted to useful output.
• Identify common sources of energy loss and describe how design choices affect operational performance.

Learning Objectives

• Explain Newton’s third law using the idea of force pairs acting on different objects
• Predict how forces affect the motion of each interacting object using momentum and direction
• Identify correct examples of action–reaction forces in real-world situations

Learning Objectives

• Explain the difference between weather and climate using evidence-based reasoning.
• Describe how Earth’s energy balance and atmospheric composition drive long-term temperature change.
• Identify examples of natural climate records (ice cores, ocean sediments, and others) and what they reveal.+ Show more

Learning Objectives

• Explain how climate models represent Earth’s energy balance and atmospheric circulation.
• Describe how greenhouse gas scenarios influence temperature and precipitation projections.
• Evaluate the role of feedbacks and uncertainty when interpreting model results.

Learning Objectives

• Explain how matter cycles through Earth’s reservoirs using geologic and biological processes.
• Describe how water, carbon, and nutrients move through the atmosphere, hydrosphere, biosphere, and geosphere.
• Use evidence-based reasoning and simple models to predict how changes in cycles can affect surface conditions and climate.

Learning Objectives

• Explain how gravitational attraction influences the motion of planets and moons.
• Use relationships between mass, distance, and orbital speed to predict orbital behavior.
• Connect observed orbital patterns to the idea of predictable trajectories under gravity.

Learning Objectives

• Explain how nuclear fusion in stars produces new elements over time
• Describe how explosive stellar events spread matter and seed future star and planet formation
• Connect stellar life cycles to the elemental inventory found on Earth

Learning Objectives

• Explain how genetic information flows from DNA to RNA to proteins.
• Describe how protein structure determines protein function in cells.
• Use DNA mutations to predict possible effects on protein sequences and cell traits.

Learning Objectives

• Explain how cells, tissues, organs, and organ systems work together to maintain complex functions in multicellular organisms.
• Describe how specialization at smaller scales supports processes such as support, transport, regulation, and coordination at larger scales.
• Use cause-and-effect reasoning to connect structure at one level to function at the next level.

Learning Objectives

• Explain how crossing over during meiosis creates genetic variation in gametes
• Describe how independent assortment increases variation by changing chromosome combinations
• Connect meiotic variation to differences observed in offspring after fertilization

Learning Objectives

• Explain how forces affect an object’s motion by changing acceleration and/or velocity
• Differentiate contact forces from field forces and give examples of each
• Use vector ideas (magnitude and direction) to describe forces and combine multiple forces conceptually

Learning Objectives

• Differentiate kinetic energy and gravitational potential energy in terms of motion and position
• Explain how height and speed affect potential and kinetic energy in everyday systems like roller coasters
• Use reference levels and energy transfer ideas to interpret energy changes during motion

Learning Objectives

• Explain how net force determines the direction and magnitude of acceleration
• Use the relationship between net force, mass, and acceleration to predict motion
• Analyze real-world scenarios with multiple forces acting on an object+ Show more

Learning Objectives

• Explain how scientific models represent phenomena at different levels of detail
• Differentiate models, explanations, and theories using evidence-based reasoning
• Describe how theories can change when new evidence conflicts with earlier ideas+ Show more

Learning Objectives

• Explain how plate convergence and continental collision produce mountain building through folding, thrust faulting, and crustal shortening.
• Identify key tectonic processes (magmatic intrusion and isostatic rebound) and describe how they change rock structure and elevation.
• Use rock types, structural patterns, and timing clues to infer tectonic history and reconstruct past plate motions.

Learning Objectives

• Explain how mid-ocean ridges create new oceanic crust through seafloor spreading
• Describe how magnetic striping in basalt records seafloor spreading history
• Interpret how seafloor age and seafloor features (bathymetry and sediment thickness) support models of plate motion

Learning Objectives

• Explain the law of conservation of mass using the idea that atoms are neither created nor destroyed during chemical reactions
• Use balanced chemical equations to account for the total number and types of atoms on both sides
• Connect conservation of mass to measurable mass changes and quantitative reaction reasoning

Learning Objectives

• Use balanced chemical equations to determine mole ratios between reactants and products.
• Convert between mass, moles, and molar mass using stoichiometry relationships.
• Apply mole ratios to calculate unknown masses of reactants or products.+ Show more

Learning Objectives

• Describe the biological hierarchy from molecules to organisms
• Explain how emergent properties arise at higher levels of organization
• Connect structure at each level to function at the next level up

Learning Objectives

• Explain how kinetic and potential energy can change within mechanical systems.
• Describe energy transfers due to work, collisions, and friction, and predict how motion changes.
• Use conservation of energy ideas to account for where mechanical energy goes when heat is produced.+ Show more

Learning Objectives

• Identify and label all external forces acting on an isolated object in a free body diagram.
• Determine the direction of each force vector and distinguish forces that cancel from forces that produce net force.
• Use net force and Newton’s second law concepts to predict acceleration and motion outcomes.

Learning Objectives

• Analyze how external and internal forces interact in a multi-body mechanical system using Newton’s laws and net force ideas
• Predict motion changes by determining the direction and magnitude of net force for linked components
• Use energy accounting to track where energy transfers and where it is dissipated (e.g., heat/sound) during collisions or mechanical events+ Show more

Learning Objectives

• Interpret genotype and phenotype frequencies to infer likely inheritance patterns.
• Connect molecular evidence (PCR markers, single nucleotide variants, sequencing reads) to genotype identification.
• Use expected genetic ratios and family information to evaluate inheritance, linkage, heterozygosity, and selection.+ Show more

Learning Objectives

• Explain Mendelian inheritance using dominant/recessive phenotypes and genotype ratios
• Compare non-Mendelian patterns (incomplete dominance, codominance, multiple alleles, polygenic, sex-linked, imprinting, mitochondrial) to Mendelian expectations
• Apply gene interaction ideas (environmental effects and linkage) to predict why phenotype ratios change

Learning Objectives

• Compare DNA and RNA structural features, including strand structure, sugar type, and base composition
• Explain how complementary base pairing and strand directionality relate to replication and transcription
• Describe how structural differences influence the stability and functions of DNA and RNA

Learning Objectives

• Explain how promoters, enhancers, silencers, and transcription factors control gene transcription.
• Describe how epigenetic modifications (DNA methylation and histone acetylation) change chromatin accessibility.
• Analyze how regulatory networks and feedback loops fine-tune gene expression in response to signals.

Learning Objectives

• Explain how the Calvin cycle uses ATP and NADPH to fix carbon dioxide into organic molecules.
• Describe the main phases of the Calvin cycle: carbon fixation, reduction, and RuBP regeneration.
• Connect specific enzymes and intermediates (like RuBisCO and 3-carbon intermediates) to each phase.

Learning Objectives

• Explain how allosteric control, inhibition (competitive and noncompetitive), and covalent modification regulate enzyme activity.
• Describe how environmental factors (temperature and pH) influence enzyme conformation and reaction rate.
• Evaluate how feedback inhibition and gene expression changes help maintain metabolic balance.

Learning Objectives

• Explain how major organ systems (circulatory, respiratory, digestive, renal, nervous, endocrine) work together to maintain homeostasis
• Describe how feedback communication helps coordinate body functions under changing external conditions
• Use evidence from a reading passage to connect organ system roles with specific physiological outcomes

Learning Objectives

• Explain how molecular signals regulate gene expression and protein activity in cells
• Describe how receptor-ligand binding and signal transduction cascades control cellular responses
• Use examples such as insulin signaling to connect molecular regulation to physiological outcomes+ Show more

Learning Objectives

• Use inverse-square relationships to calculate gravitational and electrostatic force magnitudes.
• Determine force directions using vector reasoning for attraction and repulsion.
• Compare how force strength changes across different separation distances and between force types.

Learning Objectives

• Explain how geologic and atmospheric indicators are used to characterize the origin, frequency, and potential impacts of natural hazards.
• Analyze spatial patterns and triggering mechanisms to describe why some places experience higher hazard and risk.
• Evaluate how recurrence intervals and paleoevidence support risk assessment for human and ecological systems.

Learning Objectives

• Explain how amplitude, frequency, wavelength, and phase describe wave behavior in both transverse and longitudinal waves.
• Use the wave speed relationship v = fλ to solve problems involving sound, string waves, and water-wave scenarios.
• Apply sinusoidal reasoning to predict how interference and standing waves form from superposition and reflections.

Learning Objectives

• Explain how natural selection increases the frequency of heritable traits that improve reproductive success in a specific environment.
• Describe selective pressure, fitness, and adaptive trade-offs using examples from Alberta.
• Compare artificial selection in agriculture with natural selection and infer how adaptation can accumulate over generations.

Learning Objectives

• Explain key ethical concerns related to genetic technologies, including privacy, consent, and fair access to benefits.
• Analyze trade-offs between scientific innovation and potential harms in real-world contexts such as crops, veterinary care, and biobanking.
• Evaluate how policy and public dialogue can support responsible decision-making across different stakeholder groups.

Learning Objectives

• Explain how environmental chemical changes can be analyzed using mass conservation and measurable mass flows
• Connect acid deposition chemistry to observable effects on limestone using particulate and atomic explanations
• Describe how tailings chemistry and nutrient cycling involve system boundaries and chemical transformations

Learning Objectives

• Interpret coefficient ratios in a balanced chemical equation to relate relative amounts of reactants and products.
• Use mass conservation to explain how total mass is conserved during reactions such as corrosion and fuel combustion.
• Calculate and justify reaction quantities using proportional reasoning and relative masses.

Learning Objectives

• Interpret slopes on displacement–time and velocity–time graphs as physical quantities (velocity and acceleration).
• Use the area under a velocity–time graph to determine displacement and describe motion histories.
• Identify features such as constant segments, sign changes, discontinuities, and curved sections in real-world motion data.

Learning Objectives

• Use constant-acceleration (kinematics) equations to relate displacement, time, initial velocity, final velocity, and acceleration
• Apply a consistent sign convention and correct SI units when solving motion problems
• Solve real-world applications (braking, skiing, free fall) and interpret results using substitution and algebra

Learning Objectives

• Explain Newton’s three laws using force–motion relationships and real-world examples.
• Use Newton’s laws to predict and justify how changes in force affect acceleration and motion.
• Apply action–reaction reasoning to systems involving recoil and anchoring loads.+ Show more

Learning Objectives

• Explain how impulse links force and time to the change in momentum, using the relationship J = FΔt
• Determine the direction of momentum change by analyzing whether the net impulse acts in the same or opposite direction as motion
• Apply impulse concepts to predict how changing stopping time affects peak force in real safety scenarios

Learning Objectives

• Explain why impact evaluation is necessary when science and technology affect society and the natural world.
• Identify key impact categories (environmental effects, health outcomes, resource use, and unintended consequences).
• Use evidence-based criteria to compare options and justify tradeoff decisions over time.