Grade 12 Science Worksheets

Learning Objectives

• Understand Mendelian inheritance ratios and dominance hierarchies.
• Describe phenomena like incomplete dominance, codominance, and polygenic inheritance.
• Interpret pedigree analysis, linkage mapping, and recombination frequency data.+ Show more

Learning Objectives

• Explain how engineering trade-offs involve balancing cost, performance, and risk using data and reasoning
• Evaluate design alternatives by considering long-term operating and maintenance effects, not just initial purchase price
• Use models or assumptions to compare options and justify a recommended choice

Learning Objectives

• Explain the mechanisms of energy transfer within Earth systems, including radiation, conduction, convection, and latent heat.
• Analyze how different energy pathways influence weather patterns, ocean currents, and geothermal heat flow.
• Apply quantitative reasoning using energy budgets, flux diagrams, and block models to connect microscale processes with large-scale phenomena.+ Show more

Learning Objectives

• Understand the components and processes involved in integrated modeling of complex systems.
• Analyze the importance of validation, uncertainty quantification, and transparent reporting in model assessment.
• Evaluate strategies for reconciling discrepancies between model outputs and observational data.+ Show more

Learning Objectives

• Describe molecular mechanisms controlling gene transcription and translation.
• Explain the roles of promoter architecture, transcription factors, and epigenetic modifications.
• Analyze how alternative splicing and post-translational modifications regulate protein function.+ Show more

Learning Objectives

• Explain the concepts of power and energy transfer in simple resistor-capacitor networks.
• Calculate power dissipation in resistive elements over time.
• Analyze transient charging and discharging behavior in RC circuits using exponential models.+ Show more

Learning Objectives

• Explain how meiosis and chromosome segregation create predictable allele combinations in gametes
• Use Punnett squares to determine genotype and phenotype probabilities in monohybrid crosses
• Differentiate between genotype and phenotype and interpret dominance in inheritance patterns

Learning Objectives

• Identify measurable performance metrics and explain how they connect to engineering goals and constraints
• Evaluate how optimization trade-offs and design margins help systems remain effective under varying conditions
• Use metrics to justify design choices and communicate reasoning using scientific language

Learning Objectives

• Explain and interpret conventions used in various graphical representations such as scatter plots, histograms, and residual plots.
• Identify trends, scale choices, and transformations in graphical data to make informed conclusions.
• Assess the quality of model fits visually and quantitatively, understanding how graphical choices affect analysis outcomes.+ Show more

Learning Objectives

• Interpret graph axes, units, and scales to accurately understand scientific data
• Distinguish random scatter from meaningful trends and justify conclusions using visual evidence
• Evaluate how slope, intercepts, and curvature relate to the scientific claims being tested+ Show more

Learning Objectives

• Identify the claim, evidence, and reasoning in a scientific argument
• Evaluate whether data patterns logically support conclusions by checking for missing links
• Assess how uncertainty, controls, and counterarguments affect the strength of scientific conclusions

Learning Objectives

• Identify multiple types of evidence that indicate a chemical reaction has occurred.
• Explain reaction evidence using particle-level reasoning and conservation of atoms.
• Distinguish endothermic and exothermic processes based on temperature changes.+ Show more

Learning Objectives

• Explain how heritable variation and differential fitness lead to changes in allele frequencies over generations
• Distinguish directional selection from habitat-dependent variation in adaptation
• Analyze how ecological context influences which traits become more common in a population

Learning Objectives

• Understand the quantum mechanical model of electrons and the significance of quantum numbers.
• Apply the Aufbau principle, Pauli exclusion principle, and Hund's rule to determine electron configurations and orbital diagrams.
• Analyze how electron configurations influence chemical properties and periodic table block structures.+ Show more

Learning Objectives

• Explain how technology choices affect efficiency, safety, sustainability, and reliability in real-world systems.
• Evaluate trade-offs among efficiency, safety, sustainability, and reliability when selecting or upgrading technology.
• Use evidence-based reasoning to justify technology decisions for systems operating under real conditions.

Learning Objectives

• Understand the mechanisms that generate genetic variation, including mutations and recombination.
• Explain how genetic variation influences phenotypes and evolution.
• Compare Mendelian inheritance with polygenic inheritance and gene interactions.+ Show more

Learning Objectives

• Describe the processes of mitosis and meiosis and their roles in cell division.
• Explain chromosome segregation, homologous recombination, and the consequences of nondisjunction.
• Analyze chromosomal alterations, karyotype analysis, and indicators of aneuploidy in inheritance and phenotype.+ Show more

Learning Objectives

• Understand the principles of scientific reasoning and argumentation.
• Analyze evidence and formulate well-supported scientific claims.
• Evaluate competing hypotheses using logical frameworks and evidence strength.+ Show more

Learning Objectives

• Explain how operational definitions make variables measurable and testable in science experiments.
• Use consistent units and repeatable procedures to produce trustworthy measurement data.
• Identify sources of measurement error and describe controls such as calibration, drift checks, and bias reduction.

Learning Objectives

• Describe how Hardy–Weinberg equilibrium models genetic stability in populations.
• Explain the role of mutation and selection coefficients in evolutionary change.
• Analyze the effects of genetic drift and recombination on genetic variation.+ Show more

Learning Objectives

• Explain the concept of equilibrium constants (Kc and Kp) and their significance in chemical reactions.
• Describe the role of the reaction quotient (Q) in predicting reaction direction and equilibrium state.
• Analyze how temperature influences equilibrium constants through enthalpy effects.+ Show more

Learning Objectives

• Understand the factors influencing reaction rates including concentration, temperature, and molecular orientation.
• Explain collision theory and the concept of activation energy in chemical reactions.
• Interpret rate laws and how they relate reaction rate to reactant concentrations.+ Show more

Learning Objectives

• Explain how radioactive decay and half-life enable absolute (numerical) age dating of rocks
• Interpret parent-to-daughter isotope information to infer elapsed time since formation
• Evaluate how radioactive dating complements relative dating methods in building geologic timelines+ Show more

Learning Objectives

• Explain energy system efficiency and identify common loss pathways in real systems
• Evaluate how design choices (insulation, surface area, and control systems) affect useful energy output
• Apply the efficiency concept to a solar-thermal collector by linking absorber and surface properties to stored thermal energy

Learning Objectives

• Explain chemical reactions using the particle reaction model, including bond breaking and bond forming during collisions.
• Connect observable evidence (color change, gas formation, temperature change) to microscopic changes in particle energy and arrangement.
• Use the model to reason about conservation of matter and reaction progress as redistribution of particles and energy.

Learning Objectives

• Explain how energy flows through trophic levels in an ecosystem and why energy decreases at higher levels
• Describe the roles of producers, consumers, and decomposers in ecosystem function
• Use trophic relationships to predict how changes in one population may affect others+ Show more

Learning Objectives

• Compare surface features and processes of terrestrial and icy planetary bodies.
• Analyze the internal structures and geologic histories of planets beyond Earth.
• Evaluate the evidence from remote sensing, sample analysis, and in situ measurements.+ Show more

Learning Objectives

• Analyze atomic packing and lattice structures in various solids.
• Identify different types of bonding and their influence on material properties.
• Apply band theory concepts to explain electronic properties of solids.+ Show more

Learning Objectives

• Explain the concept of gravitational fields as long-range forces producing central accelerations.
• Define gravitational potential and potential energy in two-body systems.
• Describe how field strength varies with distance from mass sources.+ Show more

Learning Objectives

• Explain the principles of wave interference, including constructive and destructive interference.
• Describe the conditions for coherence and how it affects interference patterns.
• Analyze how wavelength and aperture size influence diffraction and interference phenomena.+ Show more

Learning Objectives

• Explain how Earth’s internal energy drives long-term tectonic plate motion.
• Compare the main types of plate boundaries and the geologic processes associated with each.
• Interpret evidence for plate motion, including seafloor magnetic stripes, matching rock ages, and earthquake patterns.+ Show more

Learning Objectives

• Explain how stratigraphy and relative dating order geologic events in a rock record.
• Identify how unconformities and cross-cutting relationships reveal gaps and sequences of events.
• Interpret fossil succession to infer relative ages and past environmental change.

Learning Objectives

• Interpret data through graphical representations and identify trends.
• Apply model fitting techniques and assess goodness-of-fit metrics.
• Evaluate residuals and communicate uncertainty in data interpretation.+ Show more

Learning Objectives

• Understand the mechanisms of gene transcription and translation.
• Identify various levels of regulation in gene expression.
• Describe the roles of promoters, enhancers, and repressors in transcription.+ Show more

Learning Objectives

• Explain how qualitative and quantitative models represent relationships suggested by data
• Evaluate whether a model’s predictions align with observed measurements within expected variation
• Identify how model assumptions affect the validity of graphical and functional relationships

Learning Objectives

• Explain the VSEPR model to predict molecular shapes and Bond angles.
• Describe the effects of lone pairs, multiple bonds, and resonance on molecular geometry.
• Relate molecular geometry to polarity, symmetry, and observable properties such as dipole moments.+ Show more

Learning Objectives

• Understand the concepts of measurement error, sampling variability, and model uncertainty in environmental data.
• Evaluate how uncertainty impacts scientific interpretation and decision-making in public health and environmental monitoring.
• Apply statistical methods such as hypothesis testing, confidence intervals, and uncertainty propagation to real-world data.+ Show more

Learning Objectives

• Explain impulse as the product of net force and time interval and relate it to the change in momentum
• Analyze force–time graphs to determine how the area under the curve equals impulse and affects final momentum
• Apply vector reasoning to determine direction of impulse and momentum during collisions

Learning Objectives

• Explain momentum conservation in a closed system and how direction (sign) affects calculations.
• Differentiate elastic and inelastic collisions using kinetic energy and momentum conservation.
• Use conservation of momentum to predict post-collision velocities in one-dimensional scenarios.

Learning Objectives

• Differentiate endothermic and exothermic chemical processes using energy changes and temperature observations
• Explain how bond energies and energy profiles support the idea of conservation of energy in chemical reactions
• Interpret particle-level and system-level energy exchange during endothermic reactions

Learning Objectives

• Understand the nature of fields as spatial distributions exerting forces.
• Describe the characteristics of gravitational and electric fields as vector fields.
• Explain field lines, superposition, and the relationship between field strength and potential energy.+ Show more

Learning Objectives

• Explain how fossils, comparative anatomy, biogeography, and genetics provide evidence for evolution and common descent
• Distinguish homologous structures from analogous structures and interpret what each implies
• Use multiple evidence sources to justify why species change over time+ Show more

Learning Objectives

• Explain how erosion, weathering, and transport reshape Earth’s surface and sort sediments by properties like size and density.
• Describe how depositional landforms (deltas, alluvial fans, river terraces, moraines) form in response to transport and energy conditions.
• Interpret sedimentary and rock evidence to connect surface change with deeper geologic processes such as burial and uplift.

Learning Objectives

• Explain reflection and refraction using wave behavior at boundaries between media with different properties.
• Apply frequency conservation and predict changes in direction, speed, and wavelength when waves encounter a boundary.
• Use the ideas of refractive index (for light) and impedance/speed mismatch (for reflection) to interpret real-world phenomena.

Learning Objectives

• Understand the different types of chemical bonds: ionic, covalent, and metallic.
• Identify the characteristics and properties associated with each bond type.
• Compare bond energies, electron sharing, and their effects on material properties.+ Show more

Learning Objectives

• Understand the role of conceptual, statistical, and numerical models in representing Earth processes.
• Evaluate the limitations of model resolution and parameter selection in Earth system modeling.
• Analyze how models are validated and used for hypothesis testing and scenario analysis.+ Show more

Learning Objectives

• Understand the processes involved in erosion, including detachment, transport, and deposition of sediments.
• Identify the main agents of erosion such as water, ice, wind, and gravity.
• Analyze how erosion shapes landscapes and impacts ecosystems over time.+ Show more

Learning Objectives

• Understand how allele frequencies are affected by evolutionary forces such as selection, mutation, migration, and drift.
• Describe the roles of gene flow, genetic structure, and local adaptation in populations.
• Explain concepts of metapopulation dynamics, extinction-recolonization cycles, and effective population size.+ Show more