Grade 12 Science Worksheets

Learning Objectives

• Understand how concentration affects reaction rate.
• Explain the influence of temperature, surface area, and catalysts on reaction speed.
• Interpret rate laws and reaction order from experimental data.+ Show more

Learning Objectives

• Understand the factors affecting reaction rates such as concentration, temperature, surface area, and catalysts.
• Interpret collision theory and activated complex concepts to analyze reaction behavior.
• Learn how to determine rate laws, order, and activation energy for chemical reactions.+ Show more

Learning Objectives

• Explain how mutation, natural selection, genetic drift, and gene flow generate changes in allele frequencies within populations.
• Use adaptive landscapes and fitness concepts to predict how selection pressures can shift population traits over time.
• Connect population-level mechanisms to evidence from fossils, comparative anatomy, and molecular homology.

Learning Objectives

• Explain the photoelectric effect using photon energy, work function, and maximum kinetic energy of emitted electrons.
• Interpret experimental results using threshold frequency and stopping potential.
• Relate photon flux to photoelectric current and distinguish it from kinetic energy effects.

Learning Objectives

• Explain reaction rate in terms of collision frequency and the fraction of effective collisions
• Analyze how concentration, temperature, and physical state/surface area affect reaction rates
• Use the activation energy concept to predict whether a collision can lead to product formation+ Show more

Learning Objectives

• Explain how thermohaline and wind-driven processes drive large-scale ocean circulation and heat transport.
• Describe how salinity, temperature, density stratification, and mixing influence nutrient supply and carbon sequestration.
• Interpret how observational time series and tracer studies reveal circulation pathways and mixing timescales.+ Show more

Learning Objectives

• Explain how the water cycle transfers water among Earth’s reservoirs using energy from the Sun and gravity.
• Analyze how variability in temperature, land cover, and atmospheric circulation can change local precipitation and water availability.
• Evaluate connections between short-term weather processes and longer-term climate patterns in the water cycle.+ Show more

Learning Objectives

• Explain how weathering, erosion, transport, and deposition interact to shape landscapes and create sedimentary records.
• Use process-response thinking (climate, vegetation, tectonics) to predict changes in surface-change rates.
• Interpret sediment budgets and link them to channel profile behavior and depositional environments.+ Show more

Learning Objectives

• Explain how genetic information in DNA is used to produce messenger RNA (transcription).
• Describe how ribosomes translate mRNA codons into a polypeptide using tRNA and amino acids.
• Connect changes in the DNA sequence to possible effects on protein function and traits.

Learning Objectives

• Understand the concept of heat transfer in chemical reactions.
• Identify exothermic and endothermic reactions based on heat flow.
• Learn how to use calorimetry and specific heat to relate temperature change to energy.+ Show more

Learning Objectives

• Explain the concept of chemical equilibrium as a dynamic balance between forward and reverse reactions.
• Define and interpret the equilibrium constant as a quantitative measure of reaction position.
• Relate concentration and pressure expressions to reaction directionality and shifts.+ Show more

Learning Objectives

• Understand how molecular genetics, gene regulation, and evolutionary mechanisms interact to produce biological outcomes.
• Analyze examples such as herbicide resistance in weeds to understand mutation, selection, gene flow, and population responses.
• Evaluate how DNA-level variations influence gene expression, fitness, and ecosystem effects for holistic evolutionary assessment.+ Show more

Learning Objectives

• Understand core principles of scientific ethics including research integrity and informed consent.
• Identify case studies illustrating responsible conduct and misconduct in research.
• Evaluate the importance of reproducibility, peer review, and institutional review processes.+ Show more

Learning Objectives

• Understand core principles of research ethics
• Recognize examples of research misconduct and responsible conduct
• Identify ethical decision-making mechanisms in science

Learning Objectives

• Understand core principles of scientific ethics including research integrity and data stewardship.
• Identify responsible conduct through case studies such as data fabrication and authorship disputes.
• Explain mechanisms like peer review, institutional review, and conflict of interest management.+ Show more

Learning Objectives

• Use valence-shell electron-pair repulsion (VSEPR) to predict molecular shape and approximate bond angles from electron-pair geometry.
• Apply hybridization ideas (sp, sp2, sp3) to relate bonding and lone pairs to three-dimensional molecular structures.
• Connect molecular geometry and symmetry to polarity, dipole moment, and expected intermolecular behavior in covalent compounds.

Learning Objectives

• Understand the core principles of research ethics
• Identify examples of honest and dishonest research practices
• Explain the importance of informed consent, data stewardship, and conflicts of interest+ Show more

Learning Objectives

• Use mole concept and molar mass to convert between mass, moles, and particle counts in stoichiometry problems.
• Determine limiting reagent, theoretical yield, and percent yield from balanced chemical equations and given quantities.
• Apply gas stoichiometry using the ideal gas law and balanced-equation mole ratios to relate gas volumes and moles.

Learning Objectives

• Understand how to convert between mass, moles, and particles in chemical reactions.
• Apply mole ratios from balanced equations to calculate theoretical yields and limiting reagents.
• Solve problems involving molar mass, empirical and molecular formulas, and percent composition.+ Show more

Learning Objectives

• Explain the principles of valence-shell electron-pair repulsion (VSEPR) theory to predict molecular shapes.
• Describe how hybridization models determine molecular geometry and bond angles.
• Correlate molecular geometry with polarity and symmetry to understand physical and chemical properties.+ Show more

Learning Objectives

• Distinguish evidence-based scientific claims from claims based on personal belief or opinion
• Explain how mechanisms and predictions connect to evidence in reliable scientific reasoning
• Evaluate whether scientific statements are testable, supported by data, and open to revision

Learning Objectives

• Explain the concept of a mole in chemistry.
• Convert between mass and moles of a substance.
• Apply molar mass to calculate moles from given mass and vice versa.+ Show more

Learning Objectives

• Explain what makes a scientific claim evidence-based rather than opinion-based.
• Identify how evidence, mechanisms, and predictions work together to support or challenge an explanation.
• Evaluate claims for reliability by checking whether they can be tested and revised when new data appear.+ Show more

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 scientific claims rely on empirical evidence and logical reasoning.
• Distinguish evidence-based explanations from opinions that are not supported by data.
• Evaluate how mechanisms and predictions connect to evidence in scientific arguments.+ Show more

Learning Objectives

• Explain how photosynthesis converts light energy into chemical energy stored in glucose and other carbohydrates.
• Describe cellular respiration as a stepwise process that releases usable energy from glucose and transfers it to ATP.
• Compare the inputs, outputs, and overall purpose of photosynthesis and respiration in living systems.+ Show more

Learning Objectives

• Explain how photosynthesis transforms light energy into chemical energy stored in sugars
• Describe how cellular respiration releases usable energy by breaking down sugar molecules
• Compare how both processes rearrange atoms and manage energy flow in cells and ecosystems+ Show more

Learning Objectives

• Understand the importance of empirical evidence in scientific claims
• Identify evidence presented to support scientific conclusions
• Differentiate between supported and unsupported claims based on evidence+ Show more

Learning Objectives

• Explain how photosynthesis and cellular respiration transform both matter (atoms) and energy (forms) in cells.
• Compare reactants and products of photosynthesis vs. respiration and relate them to ecosystem energy flow.
• Use key vocabulary (e.g., glucose, ATP, CO2, oxygen) to describe the overall pathway logic of both processes.

Learning Objectives

• Understand and perform mole conversions between mass, moles, and particles.
• Apply molar masses, empirical and molecular formulas, and percent composition in calculations.
• Determine limiting reagents and theoretical yields using stoichiometric methods.+ Show more

Learning Objectives

• Explain valence-shell electron-pair repulsion (VSEPR) theory to predict molecular shapes.
• Describe how hybridization influences molecular geometry and bond angles.
• Correlate molecular shapes with properties such as polarity and symmetry.+ Show more

Learning Objectives

• Understand and apply the mole concept to convert between mass, moles, and particles.
• Calculate molar mass, empirical, and molecular formulas.
• Perform percent composition calculations.+ Show more

Learning Objectives

• Understand the principles of valence-shell electron-pair repulsion and hybridization models in predicting molecular shapes.
• Identify how molecular geometry influences polarity and symmetry.
• Relate three-dimensional molecular structures to observable properties such as dipole moments and intermolecular forces.+ Show more

Learning Objectives

• Use VSEPR and hybridization concepts to predict molecular shapes and approximate bond angles from electron-pair arrangements.
• Relate molecular geometry and symmetry to bond polarity, overall dipole moment, and macroscopic properties.
• Explain how resonance and multiple bonds affect electron distribution and the resulting 3D molecular structure.

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

• Use VSEPR (valence-shell electron-pair repulsion) theory to predict molecular shape and approximate bond angles from electron-pair counts.
• Apply hybridization concepts to connect valence-shell electron arrangements to observed molecular geometries.
• Relate molecular geometry to polarity and symmetry by reasoning about bond dipoles and lone pairs.+ Show more

Learning Objectives

• Explain how empirical evidence, logical reasoning, and testable predictions support scientific claims.
• Differentiate between evidence-based explanations and opinions or unfalsifiable statements.
• Evaluate how new observations can refine or replace scientific explanations.

Learning Objectives

• Understand the concept of static equilibrium
• Identify forces acting on objects at rest
• Recognize balanced forces and their effects+ Show more

Learning Objectives

• Explain equilibrium in terms of net force and acceleration, including cases with constant velocity.
• Apply vector reasoning to determine when multiple forces are balanced in different directions.
• Interpret real-world scenarios (tension, normal force, and weight) using force diagrams and sign conventions.+ Show more

Learning Objectives

• Understand valence-shell electron-pair repulsion theory to predict molecular shapes
• Identify hybridization models and their influence on molecular geometry
• Relate molecular shape to polarity and molecular symmetry+ Show more

Learning Objectives

• Understand the valence-shell electron-pair repulsion (VSEPR) model to predict molecular shapes.
• Explain how hybridization influences molecular geometry and bonding.
• Correlate molecular shapes with polarity and symmetry.+ Show more

Learning Objectives

• Understand the mole concept and its application in stoichiometry.
• Perform calculations involving molar mass, empirical, and molecular formulas.
• Apply conversions between mass, moles, and particle counts to solve chemical problems.+ Show more

Learning Objectives

• Explain the condition for mechanical equilibrium using net force and acceleration
• Interpret vector force diagrams to determine whether forces balance in static or constant-velocity situations
• Use Newton’s laws to justify how tension, weight, and other forces can produce equilibrium+ Show more

Learning Objectives

• Understand what constitutes scientific evidence
• Identify how scientific claims are supported by evidence
• Recognize the importance of logical analysis in science+ Show more

Learning Objectives

• Understand core principles of scientific ethics, including research integrity and informed consent.
• Identify common ethical dilemmas and appropriate responses in research contexts.
• Recognize the roles of peer review, institutional review, and data stewardship in maintaining ethics.+ Show more

Learning Objectives

• Understand and perform mole conversions among mass, moles, and particles.
• Calculate empirical and molecular formulas using mass data.
• Apply gas laws and stoichiometric principles to solve related problems.+ Show more

Learning Objectives

• Understand and perform mole conversions among mass, moles, and particles.
• Apply mole ratios from balanced equations to calculate theoretical yield and limiting reagents.
• Use gas laws and stoichiometry to solve mass-volume and concentration problems.+ Show more

Learning Objectives

• Understand the concept of equilibrium and net force
• Identify when forces are balanced in static objects
• Recognize the conditions for forces to be in equilibrium+ Show more