Grade 9 Science Worksheets

Learning Objectives

• Define mechanical work and express it using force and displacement (including when work is zero or negative).
• Identify major energy forms and distinguish kinetic and potential energy using qualitative and quantitative reasoning.
• Calculate work for constant forces and explain how energy transfer relates to conservation of energy in simple isolated systems.

Learning Objectives

• Explain Newton’s First Law using the idea of inertia and the relationship between net external force and changes in motion.
• Distinguish between an object at rest and an object moving at constant velocity in terms of net external force.
• Identify examples of static and dynamic equilibrium where balanced forces produce no net change in motion.+ Show more

Learning Objectives

• Explain how alveolar–capillary diffusion depends on partial pressure gradients, surface area, and membrane thickness.
• Describe how ventilation, anatomical dead space, and ventilation–perfusion matching affect oxygen uptake and carbon dioxide removal.
• Evaluate how haemoglobin affinity and perfusion limitations influence oxygen delivery to tissues for aerobic metabolism.

Learning Objectives

• Explain how solar radiation, geothermal heat, and radiative balance contribute to energy transfer within Earth systems
• Describe how conduction, convection, and radiation move energy and how gradients drive atmospheric and ocean circulation
• Relate radioactive decay to long-term mantle convection and volcanic activity, contrasting short-term surface exchanges with long-term internal effects

Learning Objectives

• Explain how organization from cells to tissues, organs, and organ systems supports coordinated body functions.
• Describe how different systems communicate (nervous, endocrine, and physical signaling) to maintain homeostasis.
• Model how interacting systems (e.g., circulatory–respiratory and digestive–vascular) support gas exchange and nutrient distribution.

Learning Objectives

• Explain how Earth's energy budget is influenced by solar flux and albedo
• Describe how greenhouse gases affect outgoing longwave radiation and surface-atmosphere energy balance
• Use ideas about ocean heat transport and climate feedbacks to interpret regional variability+ Show more

Learning Objectives

• Differentiate ionic, covalent, and metallic bonding based on electron interactions.
• Predict some macroscopic properties (melting point, conductivity, structure/solubility patterns) from bonding type.
• Apply bonding ideas to real-world examples such as sodium chloride and metal ores.

Learning Objectives

• Apply conservation of mass and common reaction patterns to predict likely products.
• Use reactant identities and bonding tendencies to justify predicted chemical formulas.
• Recognize typical outcomes of synthesis, decomposition, single-replacement, and neutralization reactions.

Learning Objectives

• Explain how cellular structures support specific functions (information storage, energy conversion, and selective exchange).
• Connect organism-level body structures and tissues to their functional needs (protection, movement, support).
• Use models to justify how a feature’s physical properties enable biological tasks.

Learning Objectives

• Explain the law of conservation of energy in terms of a closed system and energy transfer between objects
• Identify how kinetic energy, potential energy, internal energy, and radiation-related energy can change while total energy remains constant
• Use energy diagrams to account for changes in stored and moving energy forms within defined boundaries

Learning Objectives

• Explain how nuclear binding energy relates to energy release or absorption in fission and fusion.
• Compare fission and fusion in terms of reactants, conditions required, and typical energy outcomes.
• Describe how ionizing radiation interacts with matter and why nuclear reactions need careful control.+ Show more

Learning Objectives

• Explain how wave speed depends on frequency and wavelength and use v = fλ to relate variables
• Compare how wave speed changes between media for mechanical waves and discuss electromagnetic waves in terms of medium dependence
• Use wave relations to predict how changing frequency or wavelength affects wave behavior such as dispersal

Learning Objectives

• Explain how unequal solar heating drives temperature differences, air pressure differences, and atmospheric circulation
• Describe how energy transfers between Earth’s surface and the atmosphere influence humidity, cloud formation, and precipitation
• Use a weather model to predict how changes in temperature and moisture can affect short-term weather patterns

Learning Objectives

• Explain how human actions can affect multiple environmental systems (air, water, and land) through interconnected mechanisms.
• Evaluate environmental solutions by considering benefits, mechanisms of harm, side effects, feasibility, and uncertainty in predictions.
• Use evidence-based reasoning to compare tradeoffs among competing constraints in pollution control and resource use.

Learning Objectives

• Explain how limiting resources and carrying capacity affect population survival and reproduction in a community
• Describe how biotic interactions (competition, predation, and mutualism) shape species abundance and biodiversity
• Predict how environmental changes can shift community composition over time

Learning Objectives

• Explain how multiple lines of evidence support the idea of common ancestry and evolutionary change.
• Use anatomical, fossil, and molecular data to describe patterns of similarity and divergence among organisms.
• Interpret how shared traits and genetic information can indicate evolutionary relationships even when species look different.

Learning Objectives

• Explain how heritable traits that affect survival and reproduction can change allele frequencies over generations.
• Describe how environmental conditions shape which traits are advantageous and lead to adaptation.
• Use models and reasoning to predict how phenotype proportions may shift under natural selection.

Learning Objectives

• Explain how multiple lines of evidence (fossils, anatomy, and genetics) support evolution
• Distinguish homologous structures from analogous (convergent) traits
• Use fossil and genetic patterns to describe relatedness and gradual change+ Show more

Learning Objectives

• Explain how energy moves through ecosystems from producers to consumers and why it often decreases at each trophic level.
• Describe the role of trophic levels in energy transfer (primary, secondary, and higher-level consumers).
• Analyze how interconnected feeding relationships form food webs rather than single energy pathways.

Learning Objectives

• Explain how climate variability differs from long-term climate trends
• Describe how ocean-atmosphere interactions (El Niño and La Niña) redistribute heat and moisture
• Use evidence from multiple timescales and regions to distinguish natural variability from sustained climate change+ Show more

Learning Objectives

• Explain how greenhouse gases affect Earth’s energy flow by absorbing and re-emitting infrared radiation.
• Describe how energy balance depends on absorption, re-emission, and the altitude where radiation escapes to space.
• Use greenhouse-effect concepts to predict how changes in greenhouse gas concentrations can change surface temperature.

Learning Objectives

• Explain how friction and drag act as opposing forces to relative motion
• Analyze how friction and drag can change acceleration in real-world situations
• Relate friction to contact conditions and normal force, and drag to speed and fluid resistance

Learning Objectives

• Explain how urbanization, deforestation, agriculture, and infrastructure alter watershed processes such as runoff, sediment transport, nutrient flux, and groundwater recharge.
• Describe how watershed changes can affect channel morphology, flood frequency, and aquatic ecosystem health.
• Use turbidity and discharge as indicators to interpret water-quality and flow changes in a watershed.

Learning Objectives

• Explain how phylogenetic trees represent hypothesized evolutionary relationships using common ancestors and branching patterns.
• Differentiate monophyletic, paraphyletic, and polyphyletic groups based on what descendants are included.
• Interpret rooted versus unrooted trees and relate tree structure to direction of descent and relationships.+ Show more

Learning Objectives

• Explain speciation as the splitting of one ancestral population into distinct species.
• Compare allopatric and sympatric speciation and identify how gene flow changes in each.
• Distinguish prezygotic and postzygotic reproductive barriers and give examples of each.

Learning Objectives

• Explain how electron transport chains transfer electrons through sequential carriers in mitochondria and chloroplasts.
• Describe how proton pumping creates an electrochemical gradient used to synthesize ATP.
• Compare mitochondrial and thylakoid electron transport and relate oxygen availability to ATP yield in aerobic systems.

Learning Objectives

• Explain the structure of ATP and how its components relate to storing usable cellular energy.
• Describe how ATP hydrolysis releases energy and how that energy powers cellular work.
• Compare ATP regeneration by phosphorylation with ATP breakdown, focusing on energy transfer.+ Show more

Learning Objectives

• Explain how enzymes lower activation energy and increase reaction rates
• Describe enzyme-substrate interactions using active sites and induced fit
• Connect enzyme specificity to protein structure and amino acid residues+ Show more

Learning Objectives

• Describe the overall purpose of glycolysis in breaking glucose into two pyruvate molecules
• Explain where ATP is gained and where ATP is invested during glycolysis
• Connect NADH production in glycolysis to aerobic and anaerobic cell conditions

Learning Objectives

• Describe atomic structure using protons, neutrons, and electrons and explain how ions form.
• Use electron configurations and valence electrons to predict periodic table trends in reactivity and ionization energy.
• Connect quantized energy levels and electron arrangements to observed properties such as metallic character and electronegativity.

Learning Objectives

• Explain how chemical reactions involve changes in potential energy and kinetic energy when bonds break and form
• Distinguish endothermic and exothermic processes using enthalpy change (ΔH) and energy diagrams
• Use bond strength ideas and example reactions (such as methane combustion) to justify whether energy is released or absorbed+ Show more

Learning Objectives

• Explain energy conservation using the idea of system boundaries for open and closed systems.
• Use an energy bookkeeping approach (reservoirs and transfers) to track energy changes quantitatively.
• Interpret and construct simple energy flow diagrams for mechanical and electrical (or chemical) processes.

Learning Objectives

• Differentiate power and energy and convert between them using consistent units.
• Calculate energy demand over time from power ratings and duty cycles.
• Analyze how efficiency and system losses affect real energy throughput and performance.+ Show more

Learning Objectives

• Explain how point mutations, chromosomal rearrangements, meiotic recombination, and independent assortment generate heritable genetic variation.
• Describe how molecular changes (base substitutions and indels) can alter gene expression and protein function.
• Connect genetic variation mechanisms to population-level changes in allele frequencies and phenotypic distributions.+ Show more

Learning Objectives

• Describe the double-helix structure of DNA and explain how base pairing encodes genetic information.
• Explain how DNA is organized into chromosomes and how loci and recombination affect inheritance.
• Differentiate nuclear genomes from organelle genomes and connect chromosome number/karyotypes to genetics.

Learning Objectives

• Explain how genes (DNA) encode proteins and how regulation affects gene expression.
• Describe transcription and translation in simplified terms.
• Use examples to connect changes in protein structure or quantity to observable phenotypes.

Learning Objectives

• Explain what chemical reactions are and how atoms are rearranged to form new substances.
• Identify evidence of chemical reactions, including changes in energy and matter.
• Interpret and balance symbolic chemical equations to connect observations to particle-level changes.+ Show more

Learning Objectives

• Identify observable evidence that indicates a chemical change has occurred
• Connect evidence markers (color shift, gas, precipitate, temperature, and irreversibility) to the formation of new substances
• Explain why some observations suggest physical changes instead of chemical changes

Learning Objectives

• Explain the conservation of mass principle in closed chemical systems using atomic reasoning
• Use mass measurements and particle conservation ideas to interpret chemical reactions (including gas and combustion scenarios)
• Apply conservation of mass to simple material-balance situations relevant to real-world resource processing

Learning Objectives

• Explain how physical changes alter form or phase without creating a new substance
• Identify reversible physical changes in everyday and engineered systems
• Distinguish physical changes from chemical changes using evidence and observations

Learning Objectives

• Describe how component voltage-current (V–I) and current-temperature (I–T) relationships reveal different behaviors.
• Explain why power dissipation and temperature changes affect component stability, energy loss, and lifespan.
• Apply component curve ideas to real-world examples such as resistors, diodes, thermistors, and incandescent filaments.

Learning Objectives

• Assess whether an electrical application is safe and effective by comparing device ratings to supply and operating conditions.
• Identify protective measures that match common electrical hazards in real-world settings.
• Evaluate energy efficiency and environmental impacts when choosing or judging an electrical system.

Learning Objectives

• Explain how changing magnetic flux induces an electromotive force (emf) in a conductor
• Use Lenz’s Law to predict the direction of induced effects when magnetic flux changes
• Relate induced voltage and frequency to motion (generators) and transformer turn ratios+ Show more

Learning Objectives

• Explain how power distribution systems deliver electricity from generation to homes and businesses
• Describe why voltage transformation and feeder topology affect reliability and capacity
• Analyze how regional constraints and fault propagation influence system design and resilience

Learning Objectives

• Describe how electrical safety standards reduce shock and fire risk in homes, buildings, and outdoor installations.
• Interpret common protective device labels and explain the purpose of grounding, insulation, and overcurrent protection.
• Apply safety reasoning to decide whether an installation practice is likely to meet accepted safety and reliability criteria in Alberta conditions.

Learning Objectives

• Differentiate between speed, velocity, and acceleration using scalar vs. vector descriptions
• Apply sign conventions and unit conversions when analyzing 1D motion
• Use kinematic algebra relationships to compute unknown quantities and interpret results

Learning Objectives

• Explain how magnetic fields are produced by magnets and moving electric charges
• Use field-line ideas to predict the direction of magnetic forces on different materials
• Relate current direction to magnetic field orientation around a wire

Learning Objectives

• Explain how allele frequency differences within a population can produce variation in traits among individuals.
• Describe how random processes, heritable mutations, and gene interactions contribute to population-level trait diversity.
• Use natural selection to predict how allele frequencies and trait distributions may change over generations.+ Show more