Grade 9 Worksheets

Learning Objectives

• Explain how environmental exposures and lifestyle factors can contribute to chronic disease through biological mechanisms.
• Describe how dose–response relationships and vulnerability factors affect health outcomes over time.
• Compare epidemiological evidence with mechanistic evidence when evaluating health risks from pollutants and toxicants.

Learning Objectives

• Calculate work using W = F d cos(θ) for constant forces at an angle to displacement.
• Explain why the work from a variable force can be found from the area under a force–distance graph.
• Choose the correct method for computing work in everyday physics situations.

Learning Objectives

• Explain how an element’s identity is determined by its number of protons.
• Use atomic symbols to identify and compare representative elements.
• Describe how atomic models represent atomic identity using symbols and atomic mass.

Learning Objectives

• Use constant-acceleration kinematic equations to relate displacement, initial velocity, final velocity, acceleration, and time.
• Apply v = u + at and s = ut + 0.5at² (and related forms) to solve 1D motion problems with consistent sign conventions.
• Distinguish between vertical free-fall and horizontal/projected motion by treating components separately.

Learning Objectives

• Explain how Earth’s rotation and revolution cause apparent daily and yearly motion of celestial objects.
• Use sky coordinates (altitude and azimuth) to describe where objects appear in the sky.
• Interpret observational patterns such as rising and setting, constellations, and retrograde motion.

Learning Objectives

• Describe dissolution in terms of solute–solvent interactions and qualitative solubility behaviour
• Differentiate unsaturated, saturated, and supersaturated solutions using simple examples
• Explain how temperature and agitation affect solubility qualitatively+ Show more

Learning Objectives

• Explain how cell organelles in eukaryotic cells support specific functions, including transport, energy production, and protein synthesis.
• Relate membrane structure and compartmentalization (folding and surface area) to metabolic rates and effective exchange.
• Connect nucleus/chromatin organization and cytoskeletal elements to how cells maintain control, shape, and transport.

Learning Objectives

• Describe major carbon reservoirs in the atmosphere, biosphere, oceans, and geosphere.
• Explain how carbon moves through pathways such as photosynthesis, respiration, dissolution, and sedimentation.
• Quantify the idea of residence time and interpret how human emissions perturb natural carbon budgets.+ Show more

Learning Objectives

• Explain power as the rate of energy transfer and use the correct units to compare power values.
• Differentiate average power and instantaneous power in simple energy-transfer situations.
• Calculate and interpret mechanical efficiency as useful work or output energy divided by input energy.+ Show more

Learning Objectives

• Explain how physical barriers like skin and mucosa limit pathogen entry.
• Compare innate and adaptive immune defenses, including roles of macrophages, lymphocytes, and antibodies.
• Describe how antigen recognition and inflammation support immune responses and recovery.+ Show more

Learning Objectives

• Explain how nutrition, physical activity, tobacco exposure, pollutant inhalation, and sleep patterns can affect human health
• Describe cellular and system-level mechanisms (oxidative stress, chronic inflammation, membrane transport changes, disrupted hormonal signaling) that connect lifestyle to disease risk
• Distinguish correlation from causation by interpreting evidence and reasoning about possible reversibility of functional impairments

Learning Objectives

• Explain how action potentials and synaptic transmission allow information to travel through neural pathways.
• Describe how myelination and synaptic structure affect conduction velocity and neural processing capacity.
• Compare how central integration coordinates behavior through reflex arcs and autonomic pathways.

Learning Objectives

• Explain how the cardiovascular system transports oxygen, nutrients, and removes metabolic wastes.
• Describe how heart valves, blood vessels, and blood flow work together to support efficient circulation.
• Relate capillary exchange (filtration and reabsorption) to plasma movement and tissue needs.+ Show more

Learning Objectives

• Explain how energy from the Sun and Earth’s interior is transferred through radiation, conduction, and convection.
• Describe how energy gradients drive atmospheric and oceanic circulation and influence weathering and tectonic activity.
• Connect radioactive decay to long-term heat production, mantle convection, and volcanic activity.

Learning Objectives

• Explain how Earth’s rotation and orbital motion produce observable daily and yearly cycles.
• Distinguish solar day and sidereal day and relate them to Earth’s motion around the Sun.
• Describe how geometry and periodic gravitational effects lead to predictable changes in what we observe from Earth.

Learning Objectives

• State the principle of conservation of mass for chemical reactions in closed systems.
• Use mass accounting to predict whether reactants and products can have equal total mass.
• Distinguish true mass conservation from apparent mass changes caused by gas exchange.

Learning Objectives

• Define physical properties as observable or measurable characteristics that do not change the chemical identity of a substance.
• Classify materials using physical properties such as density, melting point, boiling point, colour, hardness, and conductivity.
• Distinguish intensive and extensive physical properties and predict how they behave in different samples.

Learning Objectives

• Identify Newton’s third law action–reaction force pairs between two interacting objects
• Explain that action–reaction forces have equal magnitude and opposite direction but act on different objects
• Distinguish internal and external forces when choosing a system for momentum and Newton’s laws

Learning Objectives

• Explain how extraction of Earth resources can alter habitats and landforms.
• Describe how pollution and water withdrawal can move contaminants through Earth systems.
• Evaluate sustainability using renewability, cumulative impacts, and reclamation potential.

Learning Objectives

• Explain Newton’s second law using the idea that net force is proportional to mass times acceleration.
• Distinguish mass from weight and connect the difference to acceleration using net force.
• Use vector reasoning (direction of net force and acceleration) and check units in force, mass, and acceleration problems.

Learning Objectives

• Explain how Earth–Moon–Sun geometry creates lunar phases and why the Moon’s orbit makes the pattern repeat.
• Distinguish solar and lunar eclipses and classify partial, total, and annular eclipses using relative alignments.
• Describe the roles of orbital inclination and node alignment in when eclipses can occur.+ Show more

Learning Objectives

• Explain how glomerular filtration is driven by hydrostatic and oncotic pressures
• Describe nephron processes of selective reabsorption, secretion, and urine concentration
• Connect kidney regulation of electrolytes, acid–base balance, and blood pressure to homeostasis and endocrine signals

Learning Objectives

• Explain how feedback mechanisms help maintain homeostasis in the human body.
• Describe how circulation, respiration, kidneys, and the nervous system interact to support survival.
• Use examples of thermoregulation, acid–base balance, and stress responses to predict system crosstalk.

Learning Objectives

• Explain why chemical equations must be balanced to conserve atoms and mass
• Interpret balanced equations as particle-level ratios represented by coefficients
• Use reactant and product formulas to identify which substances are consumed and produced

Learning Objectives

• Differentiate static friction and kinetic friction in terms of relative motion and resistance
• Describe how drag depends on speed, medium density, and cross-sectional area
• Use friction coefficients and drag regimes to reason about net force and energy dissipation

Learning Objectives

• Explain Newton’s first law using the relationship between net external force and changes in motion
• Distinguish between rest and constant velocity as cases of zero net external force
• Use examples involving friction and low-friction surfaces to predict how motion changes

Learning Objectives

• Classify forces as contact forces or non-contact forces using common examples.
• Identify the magnitude, direction, and point of application qualitatively in everyday situations.
• Describe action–reaction pairs for forces between two interacting objects.

Learning Objectives

• Explain how compound machines combine simple machines to change force and distance
• Calculate ideal mechanical advantage using force and displacement relationships
• Differentiate ideal mechanical advantage from real performance after losses+ Show more

Learning Objectives

• Describe chemical properties as tendencies to undergo specific chemical changes.
• Identify evidence of chemical change, such as new substances, gas evolution, precipitate formation, and permanent colour change.
• Distinguish chemical changes from physical changes using reaction observations and product evidence.

Learning Objectives

• Describe chemical change as a process that forms new substances with different properties and composition.
• Identify observable indicators of chemical change such as temperature change, gas production, precipitate formation, and persistent color change.
• Explain, at a microscopic level, how reactants rearrange to form products, and distinguish chemical evidence from physical changes.

Learning Objectives

• Explain phase changes using energy transfer and the motion of particles.
• Identify what happens to temperature, particle motion, and potential energy during melting, vaporization, sublimation, and condensation.
• Interpret qualitative heating and cooling curves, including temperature plateaus and latent heat.

Learning Objectives

• Explain how chemical properties affect persistence in the environment and potential exposure routes
• Evaluate trade-offs between usefulness of everyday chemicals and health or environmental risks using evidence
• Describe safe handling and disposal choices based on exposure prevention and regulatory guidance

Learning Objectives

• Identify how similes, metaphors, and other figurative language shape tone and reader understanding in context.
• Use evidence from specific wording to explain how description patterns intensify meaning or reveal attitude.
• Analyze how sound patterns (such as repetition or alliteration) and exaggeration affect interpretation.

Learning Objectives

• Distinguish narrative elements (sequence, perspective, specific details) from reflective elements (interpretation, insights, values).
• Identify how specific details and pacing contribute to actions and consequences in narrative writing.
• Connect experiences to insights and explain reasons in reflective writing.

Learning Objectives

• Identify how topic sentences express a paragraph’s purpose and guide supporting details.
• Explain how cohesion words and logical placement help ideas connect within and across paragraphs.
• Revise a paragraph to reduce repetition and strengthen clarity of the central idea.

Learning Objectives

• Revise writing to improve clarity by replacing vague wording with precise language.
• Add missing context and remove distracting details to keep the main message focused.
• Reorder ideas so key points appear when they are most needed to support understanding.

Learning Objectives

• Identify rhetorical techniques such as rhetorical questions, repetition, parallel structure, and figurative language in a passage.
• Explain how rhetorical techniques strengthen a claim by shaping audience response and emphasis.
• Distinguish emotional appeals from logical evidence and evaluate whether tone fits purpose.+ Show more

Learning Objectives

• Select an appropriate text form based on purpose, audience, and the kind of information being communicated.
• Identify common structural features of academic writing, such as introductions, topic sentences, organized paragraphs, and closings.
• Match writing conventions to text forms, including essays for argument/analysis, narratives for events, and reflections for meaning-making.

Learning Objectives

• Explain how end punctuation, commas, and other marks clarify meaning and tone
• Identify punctuation fixes for run-ons and sentence fragments
• Use commas to signal boundaries between clauses and to prevent ambiguity+ Show more

Learning Objectives

• Identify the main idea and key details in a text.
• Determine cause-and-effect relationships using information from the text.
• Infer meaning based on how ideas are organized and presented.

Learning Objectives

• Identify how themes and claims are shaped by context across different texts
• Connect personal, cultural, and historical contexts to ideas in a passage using textual details
• Analyze how perspective influences interpretation of a shared concern

Learning Objectives

• Analyze how word choice, connotation, and figurative language shape tone and emphasis in texts.
• Evaluate how structure and text features (headings, captions, sequencing, paragraph focus) guide reader conclusions.
• Interpret how sentence variety and introductions support comprehension of an argument.

Learning Objectives

• Calculate total linear momentum before and after an interaction and apply conservation of momentum to isolated systems.
• Distinguish elastic and inelastic collisions using quantitative momentum (and energy when appropriate).
• Use two-body momentum and center-of-mass ideas to interpret motion and predict outcomes.

Learning Objectives

• Use balanced chemical equations and conservation of mass to relate reactant and product amounts.
• Convert between moles, mass, and particle counts using molar mass.
• Determine the limiting reactant and predict product yield from stoichiometric ratios.

Learning Objectives

• Compare prototyping methods by fidelity level and purpose.
• Select appropriate materials and testing protocols for a tangible engineering prototype.
• Use test data to guide iterative refinement and document prototype limitations.

Learning Objectives

• Explain how devices convert energy between forms using conservation of energy and energy accounting.
• Identify common conversion devices (photovoltaic, thermoelectric, electrochemical) and the energy transformations they perform.
• Evaluate energy conversion efficiency using the idea of useful output versus input and losses.

Learning Objectives

• Calculate kinetic energy and gravitational potential energy using correct formulas and units.
• Explain how work and power relate to changes in mechanical energy.
• Use energy accounting to predict motion in near-ideal systems and describe how friction changes the energy budget.

Learning Objectives

• Identify vague or off-focus wording and revise it with precise language that preserves the writer’s intent
• Strengthen clarity by adding missing context and removing distracting details that blur the main message
• Improve the organization of ideas by revising the order of sentences and paragraphs to support understanding+ Show more