Grade 7 Science Worksheets

Learning Objectives

• Explain how phenotype can result from interactions between inherited genes and environmental conditions.
• Use evidence examples (nutrition, ultraviolet exposure, temperature) to support claims about trait variability.
• Distinguish inherited genetic contributions from environmental modulation when describing observed traits.

Learning Objectives

• Apply probability to monohybrid cross outcomes to predict expected genotype and phenotype ratios.
• Connect Punnett square results to the likelihood that offspring inherit dominant or recessive traits.
• Use expected ratios to explain why larger populations better match theoretical predictions.

Learning Objectives

• Use energy bookkeeping to track how motion energy changes during real events
• Explain energy transfers into and out of an object using qualitative and quantitative reasoning
• Connect changes in kinetic energy to thermal, sound, and other energy forms

Learning Objectives

• Explain how energy can change from one form to another while obeying conservation of energy.
• Describe energy transfer and unavoidable thermal losses in real energy-conversion devices.
• Compare efficiency using qualitative ideas and energy accounting across transformation steps.

Learning Objectives

• Describe how heat energy transfers between objects through conduction, convection, and radiation.
• Explain how temperature change and rate differences provide evidence of heat transfer.
• Connect heat transfer to real-world examples such as air currents, lamps, and electrical circuits.

Learning Objectives

• Explain how kinetic energy depends on mass and speed using proportional reasoning.
• Interpret kinetic and potential energy graphs to describe changes during motion.
• Use kinetic energy relationships to predict how doubling mass or speed affects the result.

Learning Objectives

• Explain how potential energy depends on an object’s arrangement or position in a system.
• Describe examples of gravitational, elastic, and magnetic potential energy.
• Connect changes in spatial arrangement to energy transfer into motion or work.

Learning Objectives

• Describe how abiotic drivers such as temperature, light, soil composition, moisture, and pH influence where organisms can live.
• Explain how physical gradients create microhabitats and shape resource availability within ponds, forests, and meadows.
• Connect abiotic conditions to organismal tolerance ranges and patterns of species occurrence.

Learning Objectives

• Explain how species richness, evenness, and diversity indices summarize biodiversity in a community.
• Interpret higher vs. lower diversity values across different habitats and predict impacts on stability and resilience.
• Describe how habitat heterogeneity relates to niche diversity and species turnover, and why single metrics can miss complexity.

Learning Objectives

• Explain how detritivores, fungi, and bacteria break down organic matter during decomposition
• Describe how carbon and nitrogen move through detrital pools and primary producers over time
• Analyze how abiotic conditions (like moisture, temperature, and oxygen) affect decomposition rates and soil fertility

Learning Objectives

• Distinguish biotic and abiotic components of an ecosystem and describe their roles.
• Identify trophic categories (producers, consumers, decomposers) and explain general energy flow.
• Use food chains from pond and forest settings to describe how matter cycles through ecosystems.

Learning Objectives

• Describe how light penetration, stratification, and oxygen gradients create vertical zones in ponds and lakes
• Explain how seasonal changes (warming, cooling, turnover) affect dissolved oxygen, nutrient mixing, and habitat suitability
• Use pond and lake examples to predict where different organisms are likely to live based on abiotic conditions

Learning Objectives

• Explain how human actions can alter ecosystems and change species composition and ecosystem functions
• Describe consequences for ecosystem resilience when impacts continue over time
• Identify stewardship principles such as habitat protection, mitigation, restoration priorities, and evidence-based monitoring

Learning Objectives

• Explain how invasive (non-native) species can affect native species through competition and trophic changes.
• Describe multiple pathways by which invasive species are introduced to new ecosystems.
• Analyze how establishment conditions influence whether an invasive species successfully spreads.+ Show more

Learning Objectives

• Explain the difference between exponential growth and logistic growth using the idea of carrying capacity.
• Identify limiting factors that can reduce or regulate population size, including biotic and abiotic factors.
• Distinguish density-dependent from density-independent influences on population growth.

Learning Objectives

• Explain how structural, physiological, and behavioral adaptations help organisms survive in specific habitats.
• Describe how selective pressures (temperature, moisture, predation, and resource availability) can shape adaptations.
• Use examples to identify adaptive trade-offs and how different habitats can favor different traits.

Learning Objectives

• Explain ecological succession as directional change in community composition after disturbance.
• Distinguish primary succession from secondary succession and identify typical successional stages.
• Describe how abiotic changes and biotic interactions (competition and facilitation) drive species turnover.

Learning Objectives

• Explain how energy captured by producers is transferred to consumers through trophic levels
• Use quantitative efficiency ideas (percent energy transfer) to predict how much energy becomes available at higher levels
• Describe why biomass and energy availability often decrease from one trophic level to the next

Learning Objectives

• Explain how manufacturing processes and microstructure affect strength, stiffness, and durability in advanced materials.
• Compare engineered timber, fibre-reinforced polymers, and high-performance concrete in terms of performance and practical use.
• Evaluate trade-offs among cost, fabrication complexity, and performance when selecting materials and connection methods.

Learning Objectives

• Explain how joints and connections help create continuous load paths in structures.
• Compare bolted, welded, and bearing connections in terms of load transfer and possible failure modes.
• Describe shear, bearing, and slip at connections and how detailing (e.g., gusset plates and base plates) affects capacity.

Learning Objectives

• Explain how functional requirements and constraints guide design choices.
• Use performance objectives (such as load capacity and stiffness) to compare solution options.
• Apply decision matrices and sketching to select preferred designs using criteria and trade-offs.

Learning Objectives

• Explain how corrosion, rot, moisture uptake, freeze–thaw cycling, and UV degradation reduce material performance over time
• Describe protective measures (coatings, cathodic protection, and concrete cover) and how they slow deterioration
• Relate service environment and inspection/maintenance choices to expected lifespan of bridge decks and exterior roofing

Learning Objectives

• Identify common structural failure modes and describe what triggers each one.
• Explain limit states design, including safety factors, in reducing risk.
• Relate failure mechanisms to geometry, materials, and loading conditions.

Learning Objectives

• Explain what a load path is and describe how forces travel through structural members
• Distinguish between dead loads and live loads and give examples
• Identify tension, compression, and shear in common bridge or frame members+ Show more

Learning Objectives

• Describe how gravity loads, lateral loads, and dynamic loads travel through structural members to foundations using load paths.
• Identify primary vs. secondary load routes and explain how redundancy helps prevent collapse.
• Explain how openings, re-entrant corners, and irregular geometry can change stiffness and redistribute loads.

Learning Objectives

• Define and explain key material properties: density, tensile strength, compressive strength, stiffness (modulus), ductility, toughness, and thermal expansion.
• Describe how material properties affect structural performance, including deformation and likely failure modes.
• Compare wood, steel, and reinforced concrete in terms of strength-to-weight, stiffness, and typical behavior under load.

Learning Objectives

• Explain how tensile, compression, and bending tests reveal key material properties used in structural design.
• Compare non-destructive testing (NDT) methods such as ultrasonic and hardness measurements with destructive tests.
• Describe how anisotropy and strain localization can affect the performance of timber and composite materials.+ Show more

Learning Objectives

• Explain how beams and cantilevers respond to loads through bending and shear and how these affect deflection and serviceability.
• Describe how axial force and torsion act in structural members like columns and truss bars, and compare dominant internal-force types.
• Relate geometry (span/shape) and support/load placement to internal force distribution in roof trusses and cantilevered balconies.

Learning Objectives

• Explain how iterative refinement and quantitative comparison improve structural designs.
• Describe the roles of performance-based criteria, life-cycle assessment, and constructability constraints in optimization.
• Identify how codes, safety margins, and durability requirements affect feasible solutions.+ Show more

Learning Objectives

• Compare scaled physical models, digital finite-element models, and laboratory load rigs for evaluating strength, stiffness, and failure modes.
• Explain how instrumentation such as strain gauges and displacement transducers help quantify structural response.
• Identify limitations of scaling, especially material heterogeneity and joint behavior, when using prototypes to guide design revisions.

Learning Objectives

• Explain how walls, roofs, windows, and foundations affect heat loss and heat gain through conduction, convection, and radiation.
• Describe how thermal bridging and air infiltration reduce the effectiveness of insulation and continuous barriers.
• Compare insulation placement and retrofit strategies that prioritize air sealing and layered insulation.+ Show more

Learning Objectives

• Compare how metals, ceramics, polymers, and composites transfer heat through differences in internal structure.
• Explain the roles of free electrons and lattice vibrations in thermal conductivity.
• Describe how density, porosity, and moisture can change effective conductivity in real materials.+ Show more

Learning Objectives

• Explain how buoyancy and density differences drive convective motion in fluids.
• Describe how temperature gradients affect the strength of convection and heat transfer rates.
• Connect convection to real-world phenomena such as sea and land breezes, thermals, and lake overturning.

Learning Objectives

• Explain how calibration and traceable reference points improve temperature measurement accuracy in environmental settings.
• Identify common sources of temperature-measurement error, including response time, spatial placement, radiation effects, and thermal contact.
• Interpret temperature readings using uncertainty, resolution limits, and sensor specifications to make fair comparisons.

Learning Objectives

• Explain how insulation reduces heat transfer through conduction, convection, and radiation.
• Compare common insulating materials (fibreglass, foam, reflective foils) using ideas like trapped air and thermal resistance.
• Describe how air leakage, thermal bridging, and continuous insulation affect overall heat loss in buildings.

Learning Objectives

• Identify the three modes of thermal energy transfer: conduction, convection, and radiation.
• Describe the molecular particle behavior that drives conduction and convection and explain how radiation transfers energy without direct contact.
• Contrast typical media (solids, fluids, space/vacuum) and relative rates of heat transfer in common situations.

Learning Objectives

• Use Q = mcΔT to estimate thermal energy needed to change temperature of a substance.
• Identify common heat and power units (joules and watts) and relate power to energy over time.
• Explain how surface area, temperature gradient, and time affect heat-transfer rate.

Learning Objectives

• Explain how surface albedo affects solar radiation absorbed by buildings.
• Describe how emissivity controls how much heat a surface gives off as infrared radiation.
• Compare reflective roofs and low-emissivity glazing as radiative heat strategies.+ Show more

Learning Objectives

• Explain how different thermometers measure temperature and identify their typical ranges and accuracy limits.
• Use Celsius scale conventions, including fixed points, to interpret temperature readings correctly.
• Describe how calibration, thermal contact, and environmental factors affect measurement uncertainty.

Learning Objectives

• Distinguish temperature from internal energy and explain temperature as a measure of average kinetic energy
• Describe how thermal energy flows from higher to lower internal energy and why this flow stops at thermal equilibrium
• Explain that energy is conserved during heat exchange (energy transfers, it is not created or destroyed)

Learning Objectives

• Explain how temperature changes affect material properties such as size, density, and viscosity.
• Describe how microscopic particle motion leads to macroscopic changes like expansion, contraction, and pressure changes.
• Predict how thermal cycling and phase changes can influence the performance and safety of real systems.

Learning Objectives

• Explain how the urban heat island forms due to surface materials, vegetation loss, and human heat sources.
• Describe how impervious surfaces, reduced evapotranspiration, and building geometry influence local temperature and air movement.
• Evaluate mitigation strategies such as urban greenery, cool pavements, and strategic shading and predict their likely effects.

Learning Objectives

• Explain how chemical properties affect what happens during chemical changes
• Identify observable indicators (gas, colour change, precipitates) linked to chemical processes
• Compare stability of different materials using reactivity, oxidation, corrosion, and pH-related behaviour+ Show more

Learning Objectives

• Explain how stationary and mobile phases cause separation in chromatography
• Use retention factors and resolution ideas to interpret chromatograms
• Compare chromatography results to reference substances to support identification and purity checks

Learning Objectives

• Explain how buoyant force, sedimentation rate, and centrifugal acceleration help separate mixtures by density differences.
• Compare decanting, floatation, and centrifugation and identify when each method works best.
• Use density concepts to predict which particles move to the top, bottom, or separate into layers in a separation process.

Learning Objectives

• Explain how atomic composition and bonding distinguish elements from compounds.
• Use chemical formulas to identify fixed ratios of atoms in compounds.
• Compare physical properties (such as conductivity and melting point) of elements and compounds.

Learning Objectives

• Explain how evaporation and cooling lead to crystallization, including nucleation and crystal growth.
• Describe how impurities and cooling/evaporation conditions affect crystal size, shape, and purity.
• Evaluate how recrystallization improves purity by forming well-ordered crystal lattices.

Learning Objectives

• Explain how filtration separates particles using pore size and particle/phase differences
• Describe how flow behavior affects which particles pass through porous media
• Compare filtration and sedimentation for treating heterogeneous mixtures+ Show more