Grade 9 Science Worksheets

Learning Objectives

• Explain how multiple lines of evidence (fossils, anatomy, and molecular data) support evolutionary relationships.
• Compare homologous and analogous structures and connect each to evolutionary interpretation.
• Use evidence integration to describe how scientists infer timing and patterns of descent with modification.

Learning Objectives

• Explain how key biotechnology techniques (PCR, gel electrophoresis, DNA sequencing, and CRISPR) work for genetic analysis and modification.
• Describe real-world applications of biotechnology in diagnostics, medicine, agriculture, forensics, and synthetic biology.
• Evaluate ethical, legal, and societal considerations related to genetic data, environmental impact, and equitable access.

Learning Objectives

• Describe the overall inputs and outputs of photosynthesis in chloroplasts.
• Explain how light-dependent reactions and carbon fixation work as separate, connected stages.
• Identify the roles of pigments, electron transport, ATP, and NADPH in converting solar energy to chemical energy.

Learning Objectives

• Explain how insulin and glucagon respond to changes in blood glucose using negative feedback
• Identify the roles of beta cells, alpha cells, target tissues, set points, and effectors in glucose regulation
• Describe how glycogenolysis and gluconeogenesis help restore blood glucose when it drops

Learning Objectives

• Explain how passive transport, osmosis, and active transport move substances across cell membranes
• Distinguish vesicular transport (endocytosis and exocytosis) from movement across the membrane
• Relate membrane transport to homeostasis, including volume regulation and nutrient uptake

Learning Objectives

• Explain how the nephron controls fluid and electrolyte balance through filtration, reabsorption, and secretion.
• Describe how hormones (ADH and the renin–angiotensin–aldosterone system) adjust kidney function to maintain homeostasis.
• Interpret how changes in blood volume and osmolarity lead to specific physiological responses.

Learning Objectives

• Explain how organelles work together as an integrated system to support cell metabolism and maintenance
• Describe how transport vesicles and the cytoskeleton help move proteins and lipids between compartments
• Connect specific organelle functions (chloroplasts, mitochondria, ER, peroxisomes) to system-level cell outcomes

Learning Objectives

• Compare prokaryotic (bacterial and archaeal) cell structures with eukaryotic cells.
• Identify key features of prokaryotic organization, including nucleus absence, nucleoid DNA, ribosomes, and plasmids.
• Explain how cell wall and membrane differences relate to prokaryote survival in different environments.

Learning Objectives

• Explain how computational models use equations, functions, and simulation to predict system performance.
• Develop and interpret performance objective functions for design decision-making.
• Describe how parameter estimation and sensitivity analysis support model tuning and uncertainty awareness.+ Show more

Learning Objectives

• Identify functional requirements and distinguish them from constraints in an engineering problem frame.
• Analyze competing constraints (social, economic, regulatory, environmental, and safety) to prioritize design choices.
• Use qualitative reasoning and basic quantitative bounds to judge feasibility of a conceptual solution.+ Show more

Learning Objectives

• Explain how heritable variation and environmental pressures can cause differential survival and reproduction in a population.
• Describe how allele frequencies can change under directional, stabilizing, and disruptive selection using fitness ideas.
• Connect natural selection to measurable genetic and trait shifts across generations.

Learning Objectives

• Explain how carbon, nitrogen, and phosphorus cycle through ecosystems using reservoirs and fluxes.
• Describe microbial decomposition processes and how they affect nutrient availability and primary productivity.
• Use mass-balance reasoning to predict how changes in nutrient inputs and cycling rates can alter long-term ecosystem outcomes.+ Show more

Learning Objectives

• Explain gas pressure using the particle model in terms of collisions and force.
• Describe how temperature and volume qualitatively affect gas pressure in different container situations.
• Use qualitative reasoning to predict how pressure differences cause gas flow in real-world contexts.

Learning Objectives

• Compare the purposes of mitosis and meiosis in cell growth, repair, and reproduction.
• Describe key chromosome events during mitosis and meiosis (pairing, segregation, and ploidy changes).
• Explain how errors like nondisjunction can affect chromosome number and inheritance.+ Show more

Learning Objectives

• Explain how the heart, valves, and blood vessels work together to transport oxygen, nutrients, and wastes.
• Describe capillary exchange using filtration and reabsorption and relate these processes to blood pressure and concentration gradients.
• Connect blood components (plasma and cellular elements) to transport capacity and physiological responses such as increased cardiac output.

Learning Objectives

• Explain how allele frequencies change in populations using the core ideas of population genetics.
• Apply Hardy-Weinberg equilibrium assumptions to predict whether evolution is occurring.
• Describe how genetic drift, bottlenecks, and founder effects influence genetic diversity.+ Show more

Learning Objectives

• Explain how compound machines combine multiple simple machines to change force and motion.
• Calculate ideal mechanical advantage using force relationships and displacement-based reasoning.
• Differentiate ideal mechanical advantage from actual performance by accounting for friction and deformation.+ Show more

Learning Objectives

• Explain how sex chromosomes (X and Y) affect inheritance patterns in males and females
• Identify how X-linked recessive traits show different frequencies in populations
• Describe how dosage compensation and hemizygosity influence gene expression+ Show more

Learning Objectives

• Interpret circuit diagram symbols to identify components, connection types, and circuit topology.
• Use node and reference concepts to predict current paths and relationships between voltages in a simple circuit.
• Translate information from schematic notation (e.g., resistors, switches, power sources) into a clear description of circuit function.

Learning Objectives

• Differentiate between series and parallel circuit arrangements based on how current and voltage behave.
• Predict how brightness and reliability change in series versus parallel circuits using circuit rules.
• Apply circuit reasoning to real-life examples such as lighting strings and household receptacles.

Learning Objectives

• Use symptom descriptions, circuit topology, and measurement data to infer likely electrical fault types (open, short, degradation).
• Explain how instrument readings support logical elimination of multiple possible failure modes.
• Describe practical implications for restoring safe, reliable operation in real systems.

Learning Objectives

• Describe how forces act as push or pull interactions and identify examples of contact and non-contact forces in everyday Alberta contexts.
• Use magnitude and direction to reason about forces as vectors, including how opposing forces affect motion.
• Explain, qualitatively, how net force expectations relate to whether an object speeds up, slows down, or changes direction.

Learning Objectives

• Explain how choosing a reference frame changes an observer’s measured speed, direction, and displacement
• Use vector addition to combine velocities and predict motion in relative-motion scenarios
• Distinguish between true acceleration in an inertial frame and apparent changes described in another frame

Learning Objectives

• Quantify random and systematic uncertainty using statistical descriptors such as standard deviation and standard error
• Construct and interpret confidence intervals and explain what they mean for uncertainty in a measurement
• Use basic error propagation to estimate uncertainty in single quantities and combined calculations+ Show more

Learning Objectives

• Explain how ATP connects catabolic and anabolic reactions using cellular energy coupling
• Compare electron transport chains in photosynthesis and cellular respiration and predict how changes in flux affect energy yield
• Use simplified stoichiometry and energy-diagram reasoning to connect molecular processes to organism-level energy budgets+ Show more

Learning Objectives

• Explain how passive diffusion, facilitated transport, and active transport move substances across cell membranes using concentration and energy gradients.
• Use quantitative reasoning (concentration differences and relative permeability) to predict net movement and cellular homeostasis outcomes.
• Describe how membrane composition and transport proteins help maintain osmotic balance and electrochemical gradients in different cellular compartments.+ Show more

Learning Objectives

• Explain how mitochondria, chloroplasts, endoplasmic reticulum, and lysosomes contribute to cellular maintenance and metabolic pathways.
• Connect organelle internal structures (cristae, thylakoid stacks, folded membranes) to specific functional outcomes (ATP synthesis, light capture, macromolecule processing).
• Use compartmentation and energy-flow ideas to describe how cells coordinate anabolic and catabolic reactions efficiently.

Learning Objectives

• Explain how allele frequencies are expected to change under selection, genetic drift, migration, and mutation.
• Use the Hardy-Weinberg equilibrium idea as a null model to identify when evolution is likely occurring.
• Interpret selection coefficients, fitness landscapes, and effective population size to predict evolutionary outcomes.+ Show more

Learning Objectives

• Explain how seafloor age patterns and paleomagnetic stripes provide evidence for seafloor spreading.
• Describe how earthquake distributions reveal the location and type of plate boundary.
• Distinguish divergent, convergent, and transform margins by their mechanisms and characteristic landforms.+ Show more

Learning Objectives

• Interpret P-wave and S-wave arrival times to infer distance from an earthquake source.
• Use travel-time curves and waveform features (amplitude and frequency) to compare shallow vs. deep events.
• Connect epicenter maps and seismicity patterns to plate interactions and likely rupture behavior.

Learning Objectives

• Describe how materials and energy move between the geosphere, hydrosphere, atmosphere, and biosphere using conceptual models.
• Use mass-balance thinking and causal chains to explain coupled Earth-system phenomena (e.g., nutrient transport, gas flux, ocean upwelling).
• Interpret surface processes as signals that can change over time using baseline representations.

Learning Objectives

• Explain how surface currents and thermohaline circulation redistribute heat across the oceans
• Describe how gyres, upwelling zones, and boundary currents influence regional climate and ecosystems
• Evaluate how changes in ocean circulation can create feedbacks that affect warming and extreme weather

Learning Objectives

• Explain how oceanic lithosphere subducts and why deep trenches and volcanic arcs form
• Describe how slab dehydration influences melting and arc volcanism
• Relate megathrust earthquakes to tsunamis at subduction interfaces+ Show more

Learning Objectives

• Explain how unit cells and repeating 3D arrangements form crystal lattices.
• Compare ionic, metallic, and covalent network lattices using structure-property relationships.
• Predict how lattice type affects properties such as brittleness, electrical conductivity, and melting point.

Learning Objectives

• Explain how intermolecular forces (London dispersion, dipole–dipole, and hydrogen bonding) arise from molecular structure.
• Predict how intermolecular forces affect boiling point, viscosity, and surface tension.
• Use molecular polarity and size to justify trends across similar substances and mixtures.

Learning Objectives

• Use VSEPR electron-pair repulsion to predict the 3D shape of common molecules.
• Connect molecular geometry to polarity and intermolecular forces.
• Relate molecular shape to macroscopic properties such as boiling point and solubility.

Learning Objectives

• Explain how kidney osmoregulation maintains blood volume and osmolarity through nephron filtration, reabsorption, and secretion
• Describe how antidiuretic hormone (ADH) and aldosterone adjust water and ion movement in different nephron segments
• Analyze how coordinated renal, cardiovascular, and endocrine actions support cellular homeostasis and fluid distribution

Learning Objectives

• Explain what homeostasis is and why organisms need stable internal conditions.
• Describe how feedback mechanisms work using sensors, an integrating center, and effectors.
• Connect multiple body systems (nervous, endocrine, respiratory, circulatory, and renal) to specific homeostatic functions.

Learning Objectives

• Explain how thermoregulation maintains internal temperature within functional limits through coordinated responses.
• Describe the roles of the hypothalamus, skin blood flow, sweating, and shivering in homeostasis.
• Connect temperature control to enzyme activity, membrane stability, and cellular performance.

Learning Objectives

• Explain how Newton’s three laws relate forces to changes in motion
• Predict the motion of an object using net force, inertia, and action-reaction pairs
• Analyze real-world scenarios (sports, vehicles, collisions) using the correct law

Learning Objectives

• Explain how energy moves through ecosystems from producers to consumers and decomposers
• Describe how photosynthesis converts light energy into chemical energy in biomass
• Justify why energy transfer between trophic levels is inefficient and creates narrower energy pyramids at higher levels+ Show more

Learning Objectives

• Explain how nitrogen and phosphorus move through organisms, soils, water, and the atmosphere during nutrient cycling.
• Describe key biological processes (nitrogen fixation, assimilation, mineralization, and denitrification) and how they affect nutrient availability.
• Analyze how human inputs and land-use changes can increase nutrient loading and lead to eutrophication in aquatic ecosystems.

Learning Objectives

• Explain how producers, consumers, and decomposers are linked in trophic structures and food chains.
• Compare how energy flows through food webs with how matter cycles through ecosystems.
• Analyze how trophic efficiency and trophic cascades affect biomass and ecosystem productivity.

Learning Objectives

• Explain how homeostatic feedback loops maintain internal stability using sensors, control centers, and effectors.
• Distinguish negative feedback from positive feedback and predict the direction of change in each case.
• Use labeled feedback-loop diagrams to describe how signals are transmitted and how corrective actions restore or amplify outcomes.

Learning Objectives

• Explain how magnification, resolution, and contrast affect the appearance of microscope images.
• Compare how light microscopes and electron microscopes produce magnified images.
• Interpret microscope images using scale bars and awareness of sample preparation artifacts.

Learning Objectives

• Explain how scientific arguments connect evidence to reasoning to support or weaken a claim
• Interpret patterns in data and uncertainty to decide whether evidence is strong or weak
• Identify alternative explanations and describe how additional evidence could distinguish between them

Learning Objectives

• Explain how an iteration loop uses test evidence to improve a design repeatedly until it meets criteria.
• Describe how design cycle changes (dimensions, materials, alignment, and component interactions) relate to observed test results.
• Evaluate reliability and safety margin considerations during repeated revisions.

Learning Objectives

• Explain how carrying capacity and resource limitation regulate population size over time
• Distinguish between density-dependent and density-independent factors and give examples
• Use logistic growth ideas to interpret how populations stabilize rather than grow forever+ Show more