Grade 9 Science Worksheets

Learning Objectives

• Explain how Earth’s rotation causes apparent diurnal motion of celestial objects.
• Explain how Earth’s revolution causes apparent seasonal motion and changing visibility of stars.
• Use celestial coordinate ideas to describe rising/setting and interpret altitude and azimuth.

Learning Objectives

• Explain how carbon moves among the atmosphere, biosphere, oceans, and geosphere using major fluxes.
• Describe how processes such as photosynthesis, respiration, dissolution, sedimentation, and fossil fuel formation connect different carbon reservoirs.
• Use residence time and flux ideas to interpret how anthropogenic CO2 emissions perturb the natural carbon budget.

Learning Objectives

• Describe the hydrologic (water) cycle as water moves among atmosphere, surface, and subsurface reservoirs.
• Explain how evaporation, condensation, precipitation, infiltration, runoff, and groundwater flow affect water availability and timing.
• Analyze how watershed characteristics and human activities can change flow partitioning, fluxes, and residence time.

Learning Objectives

• Explain why chemical equations must be balanced to reflect conservation of atoms and mass
• Interpret reactants, products, and coefficients in a chemical equation
• Balance simple equations using particle counts represented by coefficients+ Show more

Learning Objectives

• Define chemical properties as tendencies of substances to undergo specific chemical changes.
• Identify evidence of chemical change such as gas formation, precipitates, color change, and energy effects.
• Differentiate chemical properties from physical properties using real examples (rusting and combustion).

Learning Objectives

• Explain the particle model using particle motion, spacing, and forces to describe solids, liquids, and gases.
• Relate temperature to average kinetic energy and predict how changes in temperature affect particle behavior.
• Use diffusion and gas pressure examples to connect microscopic particle events with macroscopic observations.

Learning Objectives

• Explain how mechanical and chemical digestion prepare food for absorption.
• Describe how villi and microvilli increase surface area for nutrient transport.
• Compare how monosaccharides, amino acids, and lipids are absorbed and transported in the body.+ Show more

Learning Objectives

• Explain how negative feedback helps maintain internal stability in hormone-regulated systems (e.g., glucose homeostasis and thyroid control).
• Describe how hormones are synthesized, transported in blood, and produce cellular effects through receptor-mediated mechanisms.
• Compare hormone half-life and feedback loop timing to predict how endocrine systems respond to changing conditions.

Learning Objectives

• Evaluate how environmental exposures and lifestyle choices can increase risk for chronic diseases using mechanistic and epidemiological reasoning.
• Explain how dose–response relationships and vulnerability factors influence the likelihood and severity of health outcomes.
• Analyze how pollutants and chemical toxicants can affect cellular and organ-system functions such as DNA integrity, endocrine signaling, and transport processes.

Learning Objectives

• Describe how renal structures work together to filter blood and form urine through glomerular filtration and tubular processing.
• Explain how hydrostatic and oncotic pressures drive glomerular filtration and how reabsorption and secretion change filtrate composition.
• Use countercurrent multiplication to relate nephron structure to the kidney’s ability to concentrate urine.+ Show more

Learning Objectives

• Explain and compare simple diffusion, facilitated diffusion, osmosis, and active transport across cell membranes
• Use electrochemical gradients and membrane potential concepts to predict the direction of ion movement
• Distinguish paracellular versus transcellular transport in epithelial layers and relate them to real physiology

Learning Objectives

• Explain how body systems interact to maintain homeostasis during normal activity and acute stress.
• Describe circulation–respiration coupling and how neural and endocrine signals coordinate cardiac output.
• Use feedback mechanisms, set points, and examples (thermoregulation and acid–base balance) to predict system responses.

Learning Objectives

• Identify and contrast static and kinetic friction, including how each relates to surface properties and normal force
• Explain how fluid drag depends on velocity, cross-sectional area, and medium density, including low-speed (linear) vs high-speed (quadratic) regimes
• Use coefficients of friction and resistive-force ideas to describe net force and energy dissipation in real situations

Learning Objectives

• Calculate work using the dot-product idea: W = F d cos(θ) for constant force and displacement
• Differentiate work done by constant forces versus variable forces
• Approximate work for variable forces using areas under a force–distance graph+ Show more

Learning Objectives

• Describe and compare mean, median, and mode as measures of central tendency.
• Explain how skew, outliers, and multimodality affect which central tendency is most informative.
• Choose an appropriate measure of center based on assumptions about the data-generating process.+ Show more

Learning Objectives

• Explain how evidence chains link observations, quantitative analysis, and models to explanatory claims.
• Evaluate whether evidence is sufficient and consistent using multiple representations (graphs, summaries, diagrams).
• Identify how to handle competing explanations by comparing the full chain of inference.

Learning Objectives

• Differentiate types of representation models (mathematical formulas, graphs, schematic diagrams, and computational approximations) and explain what each is best used for.
• Evaluate model selection using representational fidelity, parsimony, and predictive scope.
• Explain how mappings between model components and measurable observables support interpretation.+ Show more

Learning Objectives

• Explain how computational simulations use hypothesized mechanisms to generate predictions from model parameters
• Describe how parameter sensitivity and scenario comparisons affect simulation outcomes
• Interpret ensembles and visualizations as representations of uncertainty+ Show more

Learning Objectives

• Explain how range, interquartile range (IQR), variance, and coefficient of variation (CV) measure variability and what each metric reveals.
• Use variability metrics to compare datasets, interpret overlapping distributions, and evaluate confidence in estimates.
• Connect quantified variability to sampling design, heterogeneity across groups, and expectations from theoretical models.

Learning Objectives

• Explain how chromosome behavior during meiosis supports Mendelian inheritance patterns.
• Use Punnett frameworks and probability to predict genotypic and phenotypic ratios for common inheritance models.
• Interpret inheritance deviations such as incomplete dominance, codominance, and linkage using pedigrees and molecular reasoning.

Learning Objectives

• Explain how information flows from DNA to RNA to protein and how changes at each step can affect phenotype.
• Analyze how DNA replication fidelity and point mutations can influence transcription, RNA processing, and translation.
• Compare the potential phenotypic impact of regulatory-region mutations versus coding-region mutations in single-gene and polygenic contexts.

Learning Objectives

• Analyze climate datasets to distinguish long-term trends from internal variability.
• Interpret spatial maps and time-series patterns in temperature, precipitation, and drought indicators.
• Explain how statistical trend analysis and signal-to-noise reasoning support evidence-based attribution of drivers.

Learning Objectives

• Explain how net external force determines changes in motion using Newton’s second law.
• Use conceptual force diagrams and free-body reasoning to identify contact and field forces.
• Apply net-force summation to calculate the acceleration of systems on inclines and with tension.

Learning Objectives

• Interpret position–time and velocity–time graphs by connecting slope and area to velocity and displacement
• Use constant-acceleration equations to predict motion along a straight line and check the direction with signs
• Relate acceleration (including negative values) to changes in velocity and the “curving” or “straightness” of motion graphs

Learning Objectives

• Explain how tectonic plates move and describe key drivers of plate motion
• Differentiate convergent, divergent, and transform plate boundaries using evidence like earthquakes and landforms
• Interpret patterns of seismic activity by relating them to plate boundaries and plate motions

Learning Objectives

• Explain why chemical equations must be balanced to conserve atoms during a reaction.
• Use coefficients and subscripts to determine how many atoms of each element appear on both sides of an equation.
• Apply balancing strategies to write correct balanced chemical equations, including state symbols.

Learning Objectives

• Explain how microscope images can be transformed into diagrammatic and physical models to show cell structure and scale.
• Identify how magnification and resolution affect what can be seen and how models should be labeled.
• Use evidence from microscopy to form testable functional hypotheses about cell processes.

Learning Objectives

• Explain the meaning of power as the rate of energy transfer in mechanical systems.
• Compare efficiency using useful output energy versus input energy.
• Describe how real-world energy losses reduce efficiency and affect machine performance.+ Show more

Learning Objectives

• Explain how birth (reproduction), death (mortality), immigration, and emigration change population size over time
• Differentiate density-dependent and density-independent factors that affect growth and carrying capacity
• Analyze how population-level patterns connect to community interactions such as predation, competition, and mutualism

Learning Objectives

• Explain how resistance and resilience differ in ecosystems after disturbance
• Describe how feedback loops, variability, and connectivity affect an ecosystem’s ability to recover
• Evaluate how thresholds and regime shifts can lead to alternate community states+ Show more

Learning Objectives

• Use quantitative measurements to constrain scientific claims and select among model-based explanations.
• Evaluate how well different models match data by checking trends, proportionality, and residual errors.
• Identify and justify assumptions in models, and explain how uncertainty affects evidence-based judgments.

Learning Objectives

• Use the wave speed relationship v = fλ to connect frequency, wavelength, and wave speed for waves in a medium.
• Interpret how changes in frequency affect wavelength when wave speed stays the same in a given medium.
• Solve conceptual and quantitative reasoning questions involving frequency and wavelength using v = fλ.+ Show more

Learning Objectives

• Explain how labeled diagrams help communicate relationships between components in a design.
• Use data summaries to compare test results to requirements, including noting uncertainty or variation.
• Justify design decisions by connecting observed outcomes to specific design trade-offs.+ Show more

Learning Objectives

• Define physical changes as changes in state or form that do not create new substances.
• Differentiate reversible and irreversible physical transformations using examples.
• Explain how energy transfer drives melting, freezing, evaporation, condensation, and dissolution.+ Show more

Learning Objectives

• Assess how chemical properties (volatility, reactivity, solubility) influence real-world risks and benefits.
• Explain how persistence and routes of exposure affect measurable environmental and health impacts.
• Evaluate trade-offs between utility and consequences using evidence-based reasoning and regulatory concepts.+ Show more

Learning Objectives

• Explain how glycolysis, the citric acid cycle, and oxidative phosphorylation work together to produce ATP
• Describe how mitochondrial structure supports proton gradients and ATP synthase activity
• Compare aerobic and anaerobic energy pathways and predict where each pathway is used

Learning Objectives

• Explain the hierarchical relationship among cells, tissues, organs, and organ systems
• Describe how cell specialization and extracellular matrices support emergent organ functions
• Use scaling ideas (surfaces vs. volume, interfaces) to predict how physiology changes from cells to systems

Learning Objectives

• Explain how neurons generate action potentials and how synapses transmit signals to control body functions.
• Describe how neural circuits and central integration organize information for coordinated responses.
• Relate myelination and synaptic architecture to conduction velocity and processing capacity.+ Show more

Learning Objectives

• Draw and interpret free-body diagrams by identifying all forces acting on an isolated object
• Apply force-vector conventions (direction, labeled forces, points of application, and coordinate axes)
• Differentiate equilibrium from acceleration using net force and Newton’s second law+ Show more

Learning Objectives

• Explain how simple machines change input force and displacement to achieve mechanical advantage
• Classify levers by fulcrum, effort, and load positions and predict how motion direction changes
• Compare ideal mechanical advantage with real performance by accounting for friction and deformation+ Show more

Learning Objectives

• Explain how net force is found by vector addition of forces and how its direction relates to acceleration.
• Determine motion outcomes (accelerate, decelerate, or remain in equilibrium) using net force and friction/air resistance.
• Solve and interpret quantitative net force and acceleration relationships for real-world Alberta scenarios.

Learning Objectives

• Represent temporally changing systems using time-series descriptions and difference equations.
• Analyze how rates, feedback loops, and equilibrium appear in data and model behavior over time.
• Connect simple phase-diagram ideas to system stability and predict transient versus steady-state trends.+ Show more

Learning Objectives

• Use dimensional analysis to check that equations for physical and biological quantities have consistent units.
• Derive relationships between quantities by tracking units and identifying plausible proportionality and rate forms.
• Use unit-checking to find and correct algebraic or modeling errors, and to constrain scaling and density/flux/rate computations.

Learning Objectives

• Explain how pigment absorption spectra determine which wavelengths of light are captured in photosynthesis
• Describe how excitation energy is transferred among pigments and converted to chemical energy in photosystems
• Use concepts of rate, efficiency, and quantum yield to predict how light intensity and wavelength affect gross and net primary productivity

Learning Objectives

• Explain how atomic number and electron arrangement lead to repeating properties on the periodic table
• Use periodic table groups and periods to predict trends in reactivity, bonding, and typical ion charges
• Connect electron configuration patterns to why elements in the same group behave similarly

Learning Objectives

• Explain how reflection, refraction, transmission, and absorption affect wave direction, wavelength, and amplitude at boundaries between media
• Use wave models to describe how diffraction and interference change wave patterns near openings and where multiple sources overlap
• Connect observed changes in wave behavior to differences in wave speed across media

Learning Objectives

• Explain why monitoring air and water quality matters for preventing environmental harm.
• Describe how scientists use chemical indicators, flow conditions, and spatial patterns to track pollution movement.
• Connect measurement strategies to mitigation goals such as emission reduction and improved treatment.

Learning Objectives

• Explain what homeostasis is and identify regulated variables and set points.
• Describe how negative feedback mechanisms reduce deviations and restore balance.
• Apply homeostasis feedback ideas to real-life examples (temperature, blood glucose, oxygen delivery).