Grade 7 Science Worksheets

Learning Objectives

• Explain the role of reference conditions and success indicators in ecological restoration
• Compare active and passive restoration approaches and describe why monitoring matters
• Describe how habitat connectivity and genetic considerations influence species selection and corridor design+ Show more

Learning Objectives

• Explain how structural, physiological, and behavioral adaptations help organisms survive in specific habitats.
• Describe how selective pressures such as temperature, moisture, predation, and resource availability can shape adaptations.
• Identify adaptive trade-offs and how adaptations influence where organisms can live.+ Show more

Learning Objectives

• Describe how stratification, light penetration, and oxygen gradients form in ponds and lakes
• Explain how abiotic gradients affect community composition and vertical zonation
• Compare the effects of summer stratification and seasonal turnover on dissolved oxygen and nutrient distribution+ Show more

Learning Objectives

• Identify how loads transfer through common structural elements (slabs/decks to beams, columns, trusses, and foundations).
• Differentiate dead loads and live loads in real-world structures.
• Recognize tension, compression, and shear forces in typical members and at connections.

Learning Objectives

• Identify major structural failure modes (buckling, fatigue cracking, beam fracture, and connection/foundation failure) and describe what triggers them.
• Explain limit states design and how safety factors and redundancy reduce the risk of collapse.
• Relate failure mechanisms to geometry, materials, and loading conditions using bridge and structural examples.

Learning Objectives

• Describe how gravity, lateral, and dynamic loads travel through structural components using load path mapping.
• Identify primary and secondary load paths and explain why redundancy helps prevent collapse.
• Explain how openings, re-entrant corners, and irregular geometry affect load redistribution and stiffness.+ Show more

Learning Objectives

• Explain how environmental exposure affects the durability of steel, timber, concrete, and polymers over time
• Describe protective measures that slow down corrosion, rot, freeze–thaw damage, and UV degradation
• Connect maintenance and inspection intervals to expected service lifespan in bridge decks and exterior roofing

Learning Objectives

• Identify how structural members respond to applied loads through bending, shear, axial force, and torsion.
• Relate geometry and support conditions to internal force distribution in beams and cantilevers.
• Explain how bending moment and shear force affect deflection and serviceability.+ Show more

Learning Objectives

• Explain how tensile, compression, and bending tests reveal key material properties and how these properties guide engineering decisions.
• Describe non-destructive testing (NDT) methods such as ultrasonic testing and hardness measurements and why they are useful.
• Identify sources of variability in materials (e.g., anisotropy and strain localization) and explain how design codes and safety factors address them.

Learning Objectives

• Define and compare key material properties: density, tensile strength, compressive strength, stiffness (modulus), ductility, toughness, and thermal expansion.
• Explain how material properties influence structural performance, including deformation, serviceability, and durability.
• Contrast wood, steel, and reinforced concrete by strength-to-weight ratio, deformation under load, and typical failure modes.

Learning Objectives

• Explain the design process from requirements and constraints to concept generation and selection.
• Describe how performance objectives (such as load capacity, stiffness, and serviceability) guide design decisions.
• Use criteria, trade-off analysis, and decision matrices to compare alternatives and justify a preferred solution.+ Show more

Learning Objectives

• Compare thermal conductivity in metals, ceramics, polymers, and composites using qualitative reasoning.
• Explain how free electrons and lattice vibrations affect heat transfer in different materials.
• Describe how density, porosity, and moisture can change effective thermal conductivity.+ Show more

Learning Objectives

• Explain how walls, roofs, windows, and foundations work together to affect a building’s thermal performance.
• Identify how thermal bridging and air infiltration influence heat loss and heat gain.
• Describe how insulation placement and continuous air/thermal barriers can reduce energy use.+ Show more

Learning Objectives

• Explain how buoyancy and density variations drive convective heat transfer in fluids
• Describe how temperature gradients and fluid properties influence convection strength
• Relate convection to real-world phenomena such as sea and land breezes, thermals, and lake overturning

Learning Objectives

• Compare scaled physical models, digital finite-element models, and laboratory load rigs for evaluating strength, stiffness, and failure modes.
• Explain how strain gauges and displacement transducers help quantify a structure’s response during testing.
• Identify limitations of scaling, including effects of material heterogeneity and joint behavior.

Learning Objectives

• Explain how calibration, resolution, and uncertainty affect the accuracy of temperature measurements.
• Identify common sources of error in temperature sensors, including response time, spatial placement, and radiation/thermal-contact effects.
• Compare how thermocouples, resistance temperature detectors (RTDs), and infrared sensors perform in different environmental conditions.

Learning Objectives

• Explain how connections and joints help maintain continuous load paths in structures.
• Compare bolted, welded, and bearing connections in terms of load transfer and redundancy.
• Describe shear, bearing, and slip at connections and how detailing can affect structural capacity.+ Show more

Learning Objectives

• Compare how liquid-in-glass, bimetallic, and digital thermometers measure temperature and identify their suitable uses.
• Use Celsius scale conventions (0°C and 100°C) and explain why calibration and good thermal contact improve accuracy.
• Distinguish systematic and random uncertainty and describe environmental factors that can affect temperature readings.

Learning Objectives

• Explain how albedo and emissivity affect radiative heat exchange between surfaces and the environment
• Predict how surface color and coatings influence solar gain and heat loss
• Describe how low-emissivity glazing and reflective roofs modify net radiative flux+ Show more

Learning Objectives

• Explain the relationship between temperature and average kinetic energy of particles.
• Distinguish internal energy from temperature in everyday situations.
• Describe how thermal energy transfers and why it flows from higher to lower internal energy.+ Show more

Learning Objectives

• Use the quantitative heat equation Q = mcΔT to calculate thermal energy changes for common materials
• Identify and apply appropriate units for heat (joules) and power (watts)
• Explain how heat-transfer rate depends on temperature gradient, surface area, and time

Learning Objectives

• Explain what chemical properties are and how they describe behaviour during chemical change
• Use observable evidence (gas, colour change, precipitate formation) to infer chemical reactions
• Relate reactivity with acids and bases, combustion potential, oxidation, corrosion, and pH changes to material suitability

Learning Objectives

• Explain how the urban heat island forms using ideas of heat storage, evaporation, and vegetation
• Describe how impervious surfaces, reduced evapotranspiration, and building geometry affect local temperature and airflow
• Evaluate mitigation strategies such as cool pavements, increased greenery, and shading

Learning Objectives

• Explain how particle motion changes with temperature and how those changes lead to thermal expansion, contraction, phase changes, and viscosity variations.
• Describe how thermal effects connect microscopic behavior to macroscopic changes in volume, density, and pressure.
• Predict practical consequences of thermal cycling for material selection, engineering design, and environmental systems.

Learning Objectives

• Identify and describe three primary modes of thermal energy transfer: conduction, convection, and radiation
• Explain the molecular/mechanism basis for each mode and typical media (solids, fluids, and space)
• Compare relative rates of heat transfer in everyday contexts and predict how heat moves

Learning Objectives

• Explain how evaporation and cooling lead to crystallization and salt/sugar recovery from solutions
• Describe nucleation and crystal growth and how impurities affect crystal purity and size
• Use factors such as evaporation rate and cooling profile to predict crystal morphology and yield

Learning Objectives

• Distinguish elements from compounds using atomic composition and bonding
• Explain how chemical formulas represent fixed ratios of atoms in compounds
• Predict how macroscopic properties (like conductivity and melting point) can change when elements form compounds

Learning Objectives

• Explain how filtration separates particles based on size and material properties of porous media
• Describe how pore size selection and flow behavior affect filtration results for sand-water suspensions and precipitates
• Compare filtration with follow-up separation methods such as evaporation and centrifugation+ Show more

Learning Objectives

• Explain how density differences drive the movement of particles during separation
• Compare decanting, floatation, and centrifugation based on buoyant force, sedimentation rate, and centrifugal acceleration
• Predict which particles will separate together by considering density contrast and suitable media/conditions

Learning Objectives

• Explain how chromatography separates mixtures using differences in how molecules interact with stationary and mobile phases.
• Describe capillary action and adsorption in paper and thin-layer chromatography (TLC).
• Interpret retention factor (Rf) values to compare substances and make claims about relative purity.

Learning Objectives

• Explain how microstructure and manufacturing choices can increase strength, stiffness, and durability in advanced materials.
• Compare engineered timber, fibre-reinforced polymers, high-performance concrete, and composite systems using key properties and limitations.
• Describe how prefabrication, connections, and retrofits affect the real-world performance of advanced materials.

Learning Objectives

• Identify how to organize categorical and numerical data using clear tabular structures
• Apply consistent units, column headings, and timestamp conventions for time-series data
• Describe metadata, sampling frames, and replication records to preserve data provenance and context+ Show more

Learning Objectives

• Differentiate pure substances from mixtures based on composition and uniformity
• Classify examples as elements, compounds, or mixtures using characteristic properties
• Explain how variable properties in mixtures affect identification and everyday material choices

Learning Objectives

• Describe how digital tools support data acquisition, including sensors, timestamps, and sampling rates.
• Explain how data organization formats (like CSV) and metadata tags improve interoperability.
• Use basic spreadsheet and data-cleaning ideas to prepare data for preliminary analysis.+ Show more

Learning Objectives

• Explain how engineering design thinking begins with defining a problem, criteria, and constraints.
• Identify how trade-off matrices and feasibility criteria help compare conceptual solutions.
• Use measurable performance indicators to refine designs through iteration.

Learning Objectives

• Explain how temperature and solvent polarity affect dissolution and solubility
• Use solubility curve ideas to predict whether a solution is unsaturated, saturated, or supersaturated
• Describe how pressure affects the solubility of gases and apply this to real-world situations+ Show more

Learning Objectives

• Explain how multiple analytical indicators can be used to assess the purity of a substance.
• Compare how melting point, boiling point, electrical conductivity, and refractive index respond to impurities.
• Use evidence such as mass loss on heating and gravimetric residue to judge whether contamination is present.

Learning Objectives

• Explain how units, scale readings, and significant figures affect measurement accuracy and precision.
• Differentiate systematic error from random error and identify common sources of each.
• Estimate measurement uncertainty and report results using appropriate conventions.+ Show more

Learning Objectives

• Identify performance metrics and constraints used in design optimization decisions.
• Explain how parameter variation and sensitivity analysis help predict how design changes affect outcomes.
• Evaluate trade-offs using cost-benefit reasoning and staged refinement to improve performance within limits.+ Show more

Learning Objectives

• Select an appropriate graph type for categorical and continuous data and explain why it fits the data.
• Construct and interpret graphs using correct axis scaling, proportional representation, and clear labeling.
• Analyze patterns in graphs by reading slope, correlation, and trends while avoiding claims of causation.

Learning Objectives

• Explain how data integrity, attribution, and intellectual property shape ethical communication in STEM
• Use conventions for technical reporting, including clear methods descriptions and accurate graphical annotation
• Describe how peer review and responsible data sharing improve reliability and public understanding of scientific findings+ Show more

Learning Objectives

• Explain how vapour pressure and boiling point differences enable separation in simple distillation
• Describe the roles of heating, vapour formation, condensation, and collection in distillation
• Compare simple distillation and fractional distillation for separating volatile components+ Show more

Learning Objectives

• Identify and interpret the mean, median, and mode as measures of central tendency
• Explain how dispersion is summarized using interquartile range (IQR) and why outliers matter
• Make reasonable comparisons of data sets using descriptive statistics+ Show more

Learning Objectives

• Identify the parts of scientific inquiry, including testable questions and hypotheses involving variables.
• Use operational definitions, proper units, and measurement precision to improve reproducibility.
• Apply basic laboratory safety and ethical data-reporting practices during experiments.+ Show more

Learning Objectives

• Identify common hazards in laboratory and field activities and explain how they lead to risks
• Analyze risk by considering both likelihood and severity and choose appropriate mitigation controls
• Interpret safety information such as labels and safety data sheets to guide safe decisions+ Show more

Learning Objectives

• Distinguish independent, dependent, and controlled variables in a fair science investigation.
• Use operational definitions to define how variables are measured or identified during an experiment.
• Design fair tests using replication and controls to reduce confounding and sampling bias.

Learning Objectives

• Define physical properties and explain how they are measured without changing a substance into a new one
• Use measurements such as mass, volume, density, and phase-change temperatures to identify and compare materials
• Relate physical descriptors like electrical conductivity and optical clarity to how substances behave in real applications

Learning Objectives

• Classify mixtures as solutions, colloids, or suspensions based on particle size and observable behavior
• Distinguish homogeneous from heterogeneous mixtures using uniformity and visible phases
• Use evidence such as light scattering and stability to predict how mixtures behave during separation