Grade 7 Science Worksheets

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

• 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 insulation reduces heat transfer by limiting conduction, convection, and radiation
• Compare insulating materials (fibreglass, foam, and reflective foils) using the idea of thermal resistance
• Describe how air leakage, thermal bridging, and continuous insulation affect overall heat loss in buildings

Learning Objectives

• Explain how iterative refinement and quantitative comparison improve structural design.
• Describe topology/form optimization ideas and how performance criteria guide material efficiency.
• Apply life-cycle assessment and constructability constraints to choose feasible solutions.+ Show more

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 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

• 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

• 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 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

• 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

• 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

• 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 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

• 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

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 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

• 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

• 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 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

• 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

• 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

• 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 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 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 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

• 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

• 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

• 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

• 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

• 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

• Explain how models use abstraction, assumptions, and parameters to represent real-world phenomena.
• Identify how units consistency and scaling affect model results.
• Describe validation using empirical observations and sensitivity testing to understand model limits.+ Show more

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

• Understand what invasive species are and how they affect native ecosystems.
• Identify mechanisms by which invasive species spread and establish.
• Analyze ecological consequences of invasive species on biodiversity and habitat structure.+ Show more

Learning Objectives

• Understand the importance of controlling variables in scientific experiments.
• Identify different types of variables and methods to manage them.
• Apply strategies such as randomization, blocking, and documentation to improve experiment accuracy.

Learning Objectives

• Describe the structure and stratification of freshwater systems such as ponds and lakes.
• Explain how abiotic gradients influence community composition and vertical zonation in standing-water ecosystems.
• Discuss seasonal changes like thermal turnover and their effects on oxygen levels, nutrient mixing, and habitat conditions in freshwater environments.

Learning Objectives

• Understand the components and roles of biotic and abiotic elements in ecosystems.
• Identify trophic categories such as producers, consumers, and decomposers and their energy flow.
• Analyze simple food chains and the cycling of matter in pond and forest ecosystems.+ Show more

Learning Objectives

• Understand various methods for testing material behavior, including tensile, compression, and bending assessments.
• Recognize non-destructive testing techniques such as ultrasonic and hardness measurements.
• Explain the concepts of anisotropy, strain localization, and the importance of safety factors and design codes in material testing.+ Show more

Learning Objectives

• Understand how walls, roofs, windows, and foundations contribute to thermal performance of buildings.
• Identify measures such as insulation placement, barriers, and ventilation that reduce heat loss and gain.
• Analyze indicators used to assess envelope performance and retrofit strategies to improve energy efficiency.

Learning Objectives

• Understand the causes and effects of urban heat island phenomena.
• Identify surface materials, vegetation, and human activities that influence urban heat levels.
• Analyze mitigation strategies to reduce urban heat effects.+ Show more

Learning Objectives

• Understand the different analytical indicators used to assess material purity.
• Learn methods such as melting point, boiling point, conductivity, refractive index, and gravimetric residue to evaluate purity.
• Interpret examples and data to determine the purity of samples based on multiple criteria.

Learning Objectives

• Understand and define key physical properties such as mass, volume, and density.
• Explain how physical properties are used to identify and classify substances.
• Connect macroscopic measurements to molecular structure and intermolecular forces.+ Show more