Grade 7 Science Worksheets

Learning Objectives

• Explain how energy moves through an ecosystem using producers, consumers, and decomposers
• Describe how matter cycles while energy flows one-way through trophic levels
• Identify factors that can change ecosystem populations and balance

Learning Objectives

• Explain what adaptations are and how they help organisms survive or reproduce in specific environments.
• Identify evidence for adaptation using comparisons among populations, fossil records, and observed responses to environmental change.
• Use an example (peppered moth coloration) to describe how selection can favor traits that match local conditions.

Learning Objectives

• Explain how early embryonic structures can be conserved across different animal groups
• Compare embryonic features (pharyngeal pouches, limb buds, and body-plan patterns) across taxa
• Use developmental timing to support ideas about evolutionary relationships

Learning Objectives

• Explain how fossil patterns in stratigraphic layers provide evidence for common ancestry and evolutionary change over geologic time.
• Use index fossils and correlations between sedimentary layers to infer relative ages and interpret changes in fossil assemblages.
• Analyze how transitional fossils and morphological trends support ideas about lineage continuity, radiations, and mass extinctions.

Learning Objectives

• Distinguish physical properties from chemical properties using qualitative and quantitative descriptors.
• Use measurable property data (density, melting point, solubility, conductivity) to compare and identify materials.
• Explain how reactivity and flammability indicate chemical change risk during temperature or contact.

Learning Objectives

• Explain how energy drives changes between igneous, sedimentary, and metamorphic rocks in the rock cycle
• Describe key processes in the rock cycle, including melting, crystallization, weathering, deposition, burial, and metamorphism
• Trace how Earth materials move through the cycle using a pathway from magma to rocks and back again

Learning Objectives

• Explain how gravity, electric forces, and magnetic forces can act over a distance without direct contact.
• Describe how mass and distance qualitatively affect gravitational attraction.
• Differentiate electric and magnetic interactions by predicting attraction vs. repulsion using evidence.

Learning Objectives

• Use test data to identify which design parameters limit performance.
• Apply iterative refinement to improve a design while staying within constraints.
• Justify design changes using quantitative comparisons and evidence.

Learning Objectives

• Explain how kinetic energy depends on mass and speed using proportional reasoning.
• Interpret graphs that compare kinetic energy to mass and to the square of speed.
• Calculate kinetic energy from given values and justify changes when mass or speed doubles.+ Show more

Learning Objectives

• Explain how boiling point differences and vapour pressure enable separation of miscible liquids by simple distillation.
• Describe how condensation converts vapour back into liquid and how fractionation improves purity.
• Identify key limitations of distillation, including close-boiling mixtures and azeotropes.+ Show more

Learning Objectives

• Explain how digital tools collect, store, and describe data so it can be reused and compared.
• Use spreadsheet functions and basic cleaning ideas to prepare sensor data for analysis.
• Interpret metadata such as timestamps, sampling rates, and tags to understand measurement quality.

Learning Objectives

• Define physical properties and describe how they are measured without changing a substance’s chemical identity
• Use physical properties (mass, volume, density, melting/boiling points, conductivity, and optical clarity) to classify materials
• Explain how phase-change temperatures and density can help identify purity and differentiate substances

Learning Objectives

• Select an appropriate graph type (bar chart, histogram, line graph, or scatter plot) for categorical vs. continuous data.
• Construct and interpret graphs by choosing appropriate axis labels and scaling, including proportional representation.
• Use graphs to identify patterns, trends, correlation, and variability without implying causation.

Learning Objectives

• Identify the criteria that make a scientific question testable and measurable
• Form a clear hypothesis and define variables with operational definitions
• Explain how measurement precision, reproducibility, and documentation improve reliability+ Show more

Learning Objectives

• Explain how models use abstraction and assumptions to represent real-world systems.
• Identify how parameters and units affect numerical models.
• Describe how to validate a model by comparing predictions with empirical observations.+ Show more

Learning Objectives

• Explain how melting point, boiling point, conductivity, refractive index, and gravimetric residue can indicate purity or contamination.
• Use “multiple lines of evidence” to justify whether a sample is likely pure.
• Compare how different tests respond to different kinds of impurities and describe trade-offs.

Learning Objectives

• Classify mixtures as solutions, colloids, or suspensions using particle size and uniformity.
• Explain how light scattering and stability help distinguish mixture types at the macroscopic scale.
• Predict how different mixtures behave during separation methods such as filtration and settling.

Learning Objectives

• Explain how filtration separates mixtures based on particle size and pore structure
• Compare filtration with sedimentation and centrifugation in terms of what each method can remove
• Identify limitations of filtration for dissolved solutes and very small colloids+ Show more

Learning Objectives

• Explain how disturbances like fire, floods, landslides, and windthrow change habitats and affect species populations.
• Describe how frequency, intensity, and spatial scale influence whether ecosystems recover or experience long-term declines.
• Use examples of disturbance-adapted species and less-adapted species to predict recovery patterns and community change.+ Show more

Learning Objectives

• Identify major parts of a cell (membrane, cytoplasm, nucleus, mitochondria, and other organelles) and describe their general functions.
• Explain how cells’ structures help them carry out specialized roles in living organisms.
• Compare plant and animal cell characteristics using evidence from cell structures.

Learning Objectives

• Explain how chloroplasts capture light energy and convert it into chemical energy during photosynthesis.
• Describe the roles of thylakoids and the stroma in forming ATP and NADPH and producing sugars.
• Connect chloroplast energy storage and starch production to plant energy needs and respiration in mitochondria.

Learning Objectives

• Explain the main role of the circulatory, respiratory, and digestive systems in maintaining life functions.
• Describe how specialized structures (capillaries and alveoli) increase the efficiency of exchange in the body.
• Make connections between how organ systems coordinate to maintain internal stability.+ Show more

Learning Objectives

• Explain how decreasing transport energy leads to deposition and the formation of landforms such as deltas and floodplains
• Describe how sediment characteristics and depositional processes create layered strata and clues about past environments
• Compare glacial, aeolian, and coastal deposition and relate them to specific landforms (moraines, drumlins, dunes, beaches, shelves)+ Show more

Learning Objectives

• Explain how the rock cycle connects tectonics, magmatism, weathering, erosion, burial, and metamorphism.
• Describe how plate motions create igneous rocks and how surface processes later recycle them into sediments.
• Use cause-and-effect reasoning to trace how rocks change environments over geologic time.+ Show more

Learning Objectives

• Explain how observable physical and chemical properties help determine whether a material is suitable for a specific application.
• Connect chemical stability and reactivity to real-world examples such as corrosion and acid resistance.
• Use properties like density, hardness, melting point, and solubility to justify material choices for engineering and environmental needs.

Learning Objectives

• Explain how evaporation and controlled cooling can create supersaturation and lead to crystallization.
• Describe nucleation and crystal growth and how these steps affect crystal size and shape.
• Identify factors such as evaporation rate, temperature profile, and impurities that influence crystal purity and yield.+ Show more

Learning Objectives

• Explain how data tables use consistent units and meaningful labels to communicate measurements clearly.
• Read and interpret graphs by using axis labels, scale, and category information to identify patterns.
• Compare groups and describe relationships using trends, clusters, and the direction/shape of patterns rather than isolated values.

Learning Objectives

• Explain how control methods reduce the influence of unrelated factors in an investigation.
• Identify control and comparison conditions and describe how they should be kept consistent.
• Use proper timing, calibration, and standardized procedures to support credible conclusions.+ Show more

Learning Objectives

• Identify and explain how competition, predation, and symbiosis affect organisms in a community
• Describe cause-and-effect relationships between interactions and population changes over time
• Differentiate major types of symbiosis: mutualism, commensalism, and parasitism

Learning Objectives

• Explain how energy moves through trophic levels in a food web
• Describe why only a fraction of energy is available to the next trophic level
• Predict how changes in trophic position affect biomass and food-chain length+ Show more

Learning Objectives

• Explain how human activities can affect Earth’s spheres (atmosphere, hydrosphere, biosphere, geosphere).
• Describe how feedbacks can amplify or reduce environmental changes over time.
• Use cause-and-effect reasoning to connect human actions to ecosystem impacts.

Learning Objectives

• Explain how weather data (temperature, wind, humidity, and precipitation) can reveal patterns across time and location
• Differentiate weather from climate and describe how climate change can occur over long periods
• Use examples of air pressure and air mass movement to interpret weather data patterns+ Show more

Learning Objectives

• Explain how internal and external Earth processes can reshape landscapes.
• Identify evidence of surface processes using rock strata, landforms, and hazard history.
• Use clues from present-day topography to infer how a region may have changed over time.

Learning Objectives

• Explain how technologies create trade-offs between benefits and costs for people and the environment
• Evaluate ethical issues in technology such as fairness, privacy, and product responsibility across the life cycle
• Connect engineering and design choices to real-world impacts on ecosystems and communities

Learning Objectives

• Construct evidence-based arguments using a clear structure of claim, evidence, and reasoning (CER).
• Critique arguments by checking whether evidence matches the claim and whether reasoning is logically supported by science principles.
• Use quantitative results and graphical information to compare models and evaluate hypotheses.+ Show more

Learning Objectives

• Interpret variability and reliability by comparing range, mean, and median in experimental data.
• Read graphical displays (box plots and histograms) to describe spread, center, and potential skew.
• Identify misleading representations caused by scale choices, missing information, or non-comparable data.

Learning Objectives

• Explain how weathering, erosion, deposition, and mass wasting change Earth’s surface over time
• Identify the main driving forces (water flow, wind, glaciers, and gravity) behind common landforms
• Use observations and mapped patterns to interpret how fast or slow surface changes occur

Learning Objectives

• Identify common evidence that a chemical reaction occurred (gas, precipitate, color change, and temperature change).
• Connect observable evidence to how reactants transform into new substances and how mass is conserved.
• Use simple symbolic formulas to describe reactant-to-product changes.

Learning Objectives

• Explain how square-cube relationships affect forces, weight, and support when objects scale up or down.
• Describe how surface-to-volume ratio changes heat transfer and resistance with scale.
• Use the idea of Reynolds number to predict how fluid-flow behavior can differ between scale models and full-size systems.

Learning Objectives

• Explain how invasive, non-native species can harm ecosystems through competition, changed food webs, and habitat structure.
• Describe common pathways by which non-native species are introduced and identify factors that help them become established.
• Evaluate how invasive species can create economic costs and increased long-term management needs.+ Show more

Learning Objectives

• Identify key structural failure modes such as buckling, fatigue cracking, fracture, and connection/foundation failures.
• Explain how geometry, material properties, and loading conditions affect which failure mode occurs.
• Describe limit states design thinking using safety factors, redundancy, and risk reduction strategies.

Learning Objectives

• Explain how functional requirements and constraints guide engineering design choices from problem definition to solution selection.
• Describe how performance objectives (such as load capacity, stiffness, and serviceability) influence design decisions.
• Use a simple decision matrix and sketches to compare concept options and justify a preferred solution using criteria and trade-offs.+ Show more

Learning Objectives

• Describe how engineers map primary and secondary load paths in multi-span bridge and building systems
• Explain how diaphragms, shear walls, and moment frames change stiffness and redirect loads
• Predict how openings, re-entrant corners, and irregular geometry can redistribute gravity, lateral, and dynamic loads+ Show more

Learning Objectives

• Explain how surface albedo and emissivity affect radiative heat exchange between surfaces and the environment
• Describe how colour and coatings change solar gain and infrared heat transfer
• Compare how reflective roofs and low-emissivity glazing help manage net radiative flux during different times of day and seasons

Learning Objectives

• Explain how urban heat island effects raise night-time temperatures and alter local microclimates.
• Describe how surface materials, vegetation, evapotranspiration, and building geometry influence heat retention and airflow.
• Evaluate mitigation strategies such as cool pavements, added urban greenery, and strategic shading.

Learning Objectives

• Explain how chromatography separates mixtures using stationary and mobile phases
• Connect molecular polarity and differential partitioning to movement through a chromatography medium
• Interpret retention factors (Rf) and use them to compare unknown samples to reference substances+ Show more

Learning Objectives

• Describe how the particle model represents matter as discrete particles with spaces and motion.
• Use particle motion and arrangement to explain macroscopic properties such as state of matter and diffusion.
• Differentiate physical changes from chemical changes using the particle model (rearrangement vs new substances).

Learning Objectives

• Explain how phase changes relate to changes in particle kinetic energy and potential energy.
• Describe latent heat as energy transferred during a phase change without changing chemical identity.
• Interpret energy absorption versus energy release for melting, freezing, evaporation, and condensation.