Grade 7 Science Worksheets

Learning Objectives

• Explain solubility, saturation, and supersaturation using solubility curves and real-life examples.
• Describe how temperature and solvent polarity affect the dissolution of solids and liquids.
• Predict how gas solubility changes with temperature and pressure using Henry’s law ideas.+ Show more

Learning Objectives

• Explain how tool resolution and measurement technique affect measurement accuracy.
• Describe how repeated measurements create a spread that represents uncertainty.
• Use ranges, overlap, or error estimates to judge whether differences are meaningful.

Learning Objectives

• Explain the technological design process as an iterative cycle: define the problem, set criteria and constraints, brainstorm, prototype, evaluate, and optimize.
• Use criteria and constraints to justify design decisions and to compare trade-offs between competing goals.
• Describe how measurements and performance metrics guide refinement of prototypes over multiple iterations.

Learning Objectives

• Define states of matter as different arrangements of particles and different energy regimes
• Describe common phase changes: melting, freezing, vaporization, condensation, and sublimation
• Explain how temperature and pressure influence phase transitions and relate them to properties such as density and viscosity+ Show more

Learning Objectives

• Identify common observable indicators of chemical reactions, including gas evolution, precipitate formation, color change, and temperature change
• Connect reaction evidence to underlying changes in chemical composition represented by symbolic formulas
• Explain how mass and energy relationships are consistent with observable evidence during chemical reactions

Learning Objectives

• Identify standard units and explain why instrument choice affects measurement accuracy and precision.
• Read measurement scales correctly and estimate uncertainty from the smallest scale division.
• Distinguish systematic error from random error and describe how each affects repeated measurements.+ Show more

Learning Objectives

• Choose an appropriate graph type (bar chart, histogram, line graph, or scatter plot) for categorical vs. continuous data.
• Construct graphs using correct axis labels, sensible scaling, and proportional representation.
• Interpret patterns, slope, and correlation without implying causation.

Learning Objectives

• Explain how models use abstraction and assumptions to represent real-world systems
• Identify parameters, units, and scaling choices in simple numerical models
• Evaluate a model by comparing predictions with empirical observations and recognizing limits

Learning Objectives

• Differentiate innovation from invention using historical examples and causes of change over time.
• Explain how diffusion and adaptation spread technological ideas across contexts and lead to new versions.
• Describe how empirical observation and design choices work together to produce incremental improvements.+ Show more

Learning Objectives

• Identify and interpret measures of center (mean, median, mode) and spread (IQR, variance) in data about natural phenomena.
• Choose appropriate visual summaries (histograms and box plots) to describe distribution and outliers.
• Explain how sample size and outliers affect uncertainty and confidence in statistical conclusions.+ Show more

Learning Objectives

• Identify criteria for strong scientific questions and use them to form testable hypotheses.
• Explain how operational definitions, variables, and reproducibility improve the reliability of results.
• Apply measurement precision and clear documentation practices to support valid comparisons across trials.+ Show more

Learning Objectives

• Identify ethical expectations for data integrity, attribution, and responsible communication in STEM projects
• Explain how technical reports and graphs should present methods, uncertainty, and limitations clearly
• Describe why peer review and public presentation affect reliability and public understanding of findings+ Show more

Learning Objectives

• Identify common hazards in laboratory and field settings and explain how to assess risk.
• Interpret safety data sheet (SDS) information and classify hazards by properties such as flammability and toxicity.
• Select appropriate risk controls, including engineering and administrative controls, to reduce exposure to an acceptable level.+ Show more

Learning Objectives

• Use metric prefixes and unit analysis to report measurements with appropriate numerical precision and units
• Explain how calibration and instrument choice affect measurement accuracy and uncertainty
• Estimate variability using repeating trials and incorporate uncertainty into calculations

Learning Objectives

• Compare common temperature-measuring instruments (liquid-in-glass, bimetallic, and digital) by how they work and when they are appropriate.
• Explain Celsius scale conventions, including fixed points and why calibration is necessary.
• Describe how thermal contact and environmental factors (radiation and air flow) can affect temperature readings.+ Show more

Learning Objectives

• Explain how waves transfer energy without permanently moving matter.
• Differentiate transverse and longitudinal waves using particle motion and wave patterns.
• Use amplitude and wavelength to describe how wave characteristics relate to energy and spacing.+ Show more

Learning Objectives

• Explain how safety standards and codes help reduce risks in technological designs.
• Identify examples of compliance practices such as load ratings, grounding, and personal protective measures.
• Describe the purpose of safety factors and how they support reliable performance.+ Show more

Learning Objectives

• Analyze short-term and long-term impacts of technology on society, the economy, and the environment
• Explain how resource consumption, waste generation, and employment shifts can result from technology changes
• Evaluate trade-offs using ethical considerations and cost-benefit reasoning, including unintended outcomes

Learning Objectives

• Explain how nonliving abiotic factors (temperature, light, water availability, soil characteristics, and salinity) limit where organisms can live
• Describe how environmental gradients and microclimates influence species tolerances and seasonal patterns
• Connect abiotic variability to habitat suitability, ecosystem productivity, and community composition

Learning Objectives

• Describe how competition, predation, mutualism, and parasitism influence ecological niches and species survival.
• Explain how niche partitioning reduces competition and helps species coexist in the same habitat.
• Identify the role of keystone species in shaping community composition and stability.+ Show more

Learning Objectives

• Explain how model evaluation compares predicted outcomes to evidence from observations or experiments
• Identify likely causes of mismatches between model predictions and evidence, including incorrect assumptions or missing factors
• Describe how computational simulations and sensitivity testing can reveal which inputs most affect model outputs+ Show more

Learning Objectives

• Explain how evidence, claims, and reasoning connect in a scientific argument.
• Use specific data values or graph features to support a claim.
• Identify limitations and avoid unsupported cause-and-effect in explanations.

Learning Objectives

• Explain how exponential growth differs from logistic growth in real populations
• Identify limiting factors and distinguish density-dependent from density-independent influences
• Interpret population curves and relate curve patterns to resource limits and environmental variability

Learning Objectives

• Explain how detritivores, fungi, and bacteria contribute to decomposition and nutrient cycling.
• Describe how carbon and nitrogen are transformed during decomposition.
• Evaluate how abiotic factors (temperature, moisture, oxygen, and chemistry of matter) affect decomposition rates and soil fertility.

Learning Objectives

• Identify major ways humans alter ecosystems, including habitat fragmentation, pollution, and invasive species.
• Explain how human changes to abiotic conditions can shift biodiversity, food webs, and ecosystem services.
• Describe mitigation and restoration strategies and how they can influence ecosystem recovery over time.

Learning Objectives

• Explain how distance affects sound amplitude and perceived loudness
• Connect frequency to pitch and amplitude to perceived volume
• Describe how reflection creates echoes and absorption reduces sound intensity+ Show more

Learning Objectives

• Explain how connections and joints help create continuous load paths in trusses and frames.
• Compare bolted, welded, and bearing connections based on how they transfer shear, bearing, and slip.
• Describe how gusset plates and base plates distribute concentrated forces to improve stiffness and reduce failure risk.+ Show more

Learning Objectives

• Explain how functional requirements and constraints guide the steps of the design process.
• Use performance objectives (load capacity, stiffness, serviceability) to compare and select design options.
• Describe how decision matrices, sketches, and trade-off analysis support choosing a preferred solution.

Learning Objectives

• Describe how engineered timber, fibre-reinforced polymers, and high-performance concrete are made and why they are stronger or more durable.
• Explain how microstructure and manufacturing choices affect strength, stiffness, and durability.
• Evaluate trade-offs among cost, fabrication complexity, and performance in real construction and retrofit situations.+ Show more

Learning Objectives

• Explain what a load path is and describe how loads transfer from slabs or decks to beams, columns, trusses, and foundations
• Differentiate between dead loads and live loads and identify how they affect structures
• Identify where tension, compression, and shear typically occur in common structural members+ Show more

Learning Objectives

• Explain how solar energy becomes chemical energy in producers and then flows through trophic levels.
• Use trophic efficiency ideas to predict how energy availability changes from one level to the next.
• Interpret simple biomass pyramid patterns and describe why higher trophic levels have less energy and biomass.+ Show more

Learning Objectives

• Explain how corrosion, rot/moisture uptake, freeze–thaw cycling, and UV degradation reduce material performance over time
• Identify protective measures (coatings, cathodic protection, concrete cover) and how they affect service lifespan
• Use bridge deck and exterior roofing examples to connect environmental exposure, inspection, and maintenance to long-term reliability

Learning Objectives

• Explain how applied loads create internal forces (bending moment, shear force, axial force, and torsion) in structural members.
• Describe how beam and cantilever support conditions affect deflection and serviceability.
• Compare bending- and shear-dominated members with axial-dominated members such as columns and truss bars.

Learning Objectives

• Explain ecological succession as predictable change in community composition after a disturbance
• Distinguish primary succession from secondary succession using examples
• Identify key drivers of succession, including soil development, seed dispersal, competition, and facilitation+ Show more

Learning Objectives

• Define key material properties (density, tensile/compressive strength, stiffness, ductility, toughness, thermal expansion) and describe what each property influences in structures.
• Compare wood, steel, and reinforced concrete in terms of strength-to-weight ratio, deformation under load, and typical failure modes.
• Apply material property reasoning to beam and column examples for serviceability, durability, and anticipated loading conditions.

Learning Objectives

• Define ecosystem resilience and describe how disturbances change ecosystems
• Explain how population changes and community relationships can indicate stability
• Predict how recovery may differ when key species or nutrient cycles are disrupted

Learning Objectives

• Identify primary and secondary load paths in structures and explain why redundancy matters
• Describe how openings, re-entrant corners, and irregular geometry affect load redistribution
• Explain how diaphragms, shear walls, and moment frames change stiffness and force routes

Learning Objectives

• Explain how competition, predation, and symbiosis affect survival and population changes in an ecosystem.
• Distinguish mutualism, commensalism, and parasitism as types of symbiosis.
• Use evidence from examples to predict how an interaction can change resource availability over time.

Learning Objectives

• Explain how buoyancy and density variations cause convective circulation in air and water
• Describe how temperature gradients influence the strength and heat-transport rate of convection
• Connect convection to real-world phenomena such as sea and land breezes, thermals, and lake overturning+ Show more

Learning Objectives

• Identify the three primary modes of thermal energy transfer: conduction, convection, and radiation.
• Describe the molecular mechanisms that underlie conduction and convection, and explain why radiation does not require a medium.
• Compare typical media (solids, fluids, and space) and relative behavior (how quickly and through what) for each mode using everyday examples.

Learning Objectives

• Explain how insulation reduces heat transfer by limiting conduction, convection, and radiation
• Compare common insulating materials (fiberglass, foam, and reflective foils) using thermal resistance ideas and practical thickness
• Describe how thermal bridging and air leakage increase heat loss and why continuous insulation helps

Learning Objectives

• Explain how walls, roofs, windows, and foundations affect heat loss and heat gain through conduction, air leakage, and radiation.
• Identify how thermal bridging and air infiltration reduce the effectiveness of insulation and air barriers.
• Use common indicators (R-value, U-value, and air changes per hour) to describe building envelope performance.+ Show more

Learning Objectives

• Explain species richness and evenness and how they relate to biodiversity indices.
• Interpret diversity index values when comparing different habitats.
• Describe how niche diversity, habitat heterogeneity, and species turnover are connected.+ Show more

Learning Objectives

• Explain conservation of energy using the idea that energy is transferred and changes form but is not lost
• Identify evidence of energy transfer using temperature changes and changes in motion
• Use energy models to describe how friction can convert mechanical energy into thermal energy

Learning Objectives

• Compare scaled physical models, digital finite-element models, and laboratory load rigs for testing strength, stiffness, and failure modes
• Explain how instrumentation such as strain gauges and displacement transducers helps quantify structural response
• Describe limitations of prototyping, including scaling issues for material heterogeneity and joint behavior+ Show more

Learning Objectives

• Understand how energy pathways and transformations are represented in system models.
• Identify the principles of energy conservation in mechanical and industrial systems.
• Analyze energy flow diagrams, including Sankey diagrams, to determine efficiencies and losses.+ Show more

Learning Objectives

• Explain how genetic information in reproductive cells leads to inherited traits in offspring
• Compare inherited traits and environmental influences using examples
• Use simple inheritance patterns (dominant/recessive concepts) to predict trait outcomes+ Show more

Learning Objectives

• Understand how to evaluate competing design options by mapping tradeoffs among criteria and constraints.
• Identify how improvements in one feature can negatively impact another feature in design choices.
• Analyze tradeoff scenarios considering safety, efficiency, and feasibility.+ Show more