Grade 9 Worksheets

Learning Objectives

• Define abstraction as focusing on essential features of a problem
• Identify essential and unnecessary details in a model
• Explain how models represent systems in simplified forms+ Show more

Learning Objectives

• Explain how the heart and lungs work together to supply oxygen and remove carbon dioxide.
• Identify the roles of pulmonary ventilation and cardiovascular transport in maintaining homeostasis.
• Describe how chemoreceptors regulate respiratory and circulatory responses to blood gas levels.+ Show more

Learning Objectives

• Explain how melting, crystallization, weathering, erosion, deposition, and metamorphism connect to form the rock cycle.
• Describe how energy sources and relative rates influence transitions in the rock cycle.
• Use observable field evidence (foliation, sedimentary layering, igneous intrusions) to identify rock-cycle processes.

Learning Objectives

• Explain how matter cycles through ecosystems as producers, consumers, and decomposers transform nutrients and release elements back to the environment.
• Use the idea of conservation of matter to describe how chemical elements move across trophic levels.
• Differentiate the roles of photosynthesis/chemical building, feeding and respiration/excretion, and decomposition in nutrient cycling.

Learning Objectives

• Explain how checking URLs reduces cybersecurity risk
• Identify suspicious links and risky browsing situations
• Explain how software updates improve device protection+ Show more

Learning Objectives

• Explain how enzymes lower activation energy to speed up reactions
• Use key vocabulary (enzyme, substrate, active site, activation energy, catalyst, transition state)
• Describe how enzyme–substrate specificity depends on protein structure+ Show more

Learning Objectives

• Understand the principle of conservation of atoms in chemical reactions
• Identify how atoms are rearranged during reactions
• Differentiate between exothermic and endothermic reactions based on energy transfer+ Show more

Learning Objectives

• Understand the relationships among Earth's, Sun's, and Moon's orbits that produce lunar phases, seasons, and tides.
• Explain how Earth's axial tilt and orbital eccentricity influence climate and seasonal variations.
• Describe the gravitational interactions between Earth, Moon, and Sun that generate tidal patterns.+ Show more

Learning Objectives

• Explain how colonization created both cooperation and conflict between Indigenous peoples and colonial groups.
• Identify examples of continuity and change in Indigenous resiliency, adaptation, and resistance.
• Analyze how colonial policies aimed to assimilate or marginalize Indigenous peoples and how communities responded.

Learning Objectives

• Understand what coefficients in balanced chemical equations represent
• Interpret ratios of coefficients to determine relative amounts of reactants and products
• Relate symbolic coefficients to real-world mass relationships in chemical reactions+ Show more

Learning Objectives

• Explain how algorithms solve problems through ordered, clear instructions
• Translate everyday tasks into logical pseudocode sequences
• Identify valid algorithm steps based on problem constraints+ Show more

Learning Objectives

• Identify and describe major carbon reservoirs on Earth
• Understand the fluxes that transfer carbon among different reservoirs
• Explain the role of biological processes like photosynthesis and respiration+ Show more

Learning Objectives

• Explain how transcription and translation convert DNA information into a functional protein.
• Identify the roles of key molecules involved in gene expression (RNA polymerase, mRNA, ribosome, tRNA).
• Describe how regulation at transcriptional and translational stages affects when and how much a gene is expressed.+ Show more

Learning Objectives

• Understand the key concepts of land and water interactions in ecosystems.
• Identify practices that contribute to soil conservation and watershed management.
• Analyze trade-offs among agricultural productivity, biodiversity, and watershed health.+ Show more

Learning Objectives

• Explain how decomposition breaks complex problems into manageable subproblems
• Identify clear goals for individual subproblems
• Choose strategies for planning and troubleshooting decomposed systems+ Show more

Learning Objectives

• Use kinematic relations to describe motion with acceleration along a straight line
• Apply net force reasoning (force balances) to predict changes in velocity and stopping behavior
• Combine energy considerations with friction and incline/grade effects to estimate stopping distance+ Show more

Learning Objectives

• Understand and interpret multiple lines of evidence supporting evolution, including fossil records, comparative anatomy, biogeography, and molecular data.
• Describe mechanisms such as natural selection, genetic drift, gene flow, and mutation that influence evolution and adaptation.
• Evaluate scenarios like antibiotic resistance and environmental adaptations in the context of evolutionary principles.

Learning Objectives

• Describe chemical properties as tendencies to undergo specific chemical changes.
• Identify evidence of chemical change (gas evolution, precipitate formation, permanent color change, and energy exchange).
• Differentiate chemical changes from physical changes using observation-based reasoning.+ Show more

Learning Objectives

• Understand the basic concepts of gravity
• Learn how gravity influences the motion of planets and moons
• Recognize the patterns of orbit in the solar system+ Show more

Learning Objectives

• Identify the main idea and key details about human impacts on biodiversity and ecosystem services.
• Explain how human actions can change habitats and species interactions.
• Describe how changes in biodiversity can affect ecosystem services such as pollination and water purification.

Learning Objectives

• Describe the process of meiosis and how it contributes to genetic diversity.
• Identify key events during meiosis such as crossing over and independent assortment.
• Explain how meiosis results in genetically unique gametes and offspring.

Learning Objectives

• Explain how atomic structure (especially outer electron arrangement) creates repeating patterns on the periodic table.
• Use periodic table groups and periods to predict trends in reactivity and typical ion charge.
• Justify how similar electron configurations lead to similar chemical behavior across a group.

Learning Objectives

• Identify common flowchart symbols and describe their purposes
• Trace arrows to interpret the sequence of flowchart steps
• Explain how conditions create different decision branches+ Show more

Learning Objectives

• Explain the relationship between net force, mass, and acceleration.
• Describe how the direction of force affects the acceleration of an object.
• Calculate acceleration given net force and mass using the proportional rule.+ Show more

Learning Objectives

• Understand and describe Newton's three laws of motion.
• Connect observable motions, such as a puck sliding or bouncing ball, to Newtonian principles.
• Explain how forces and interactions predict motion outcomes.+ Show more

Learning Objectives

• Explain how predation, competition, and mutualism are represented in ecosystem interaction networks.
• Analyze how changes in one population can cascade through food and resource relationships.
• Interpret how abiotic factors like water, temperature, and nutrients affect survival and growth.

Learning Objectives

• Explain how climate variability is identified by comparing many weather measurements over time
• Differentiate climate variability from persistent climate change
• Interpret how ocean-atmosphere shifts can change regional weather patterns+ Show more

Learning Objectives

• Explain how cell membranes regulate transport of nutrients and wastes
• Describe how cells use energy to power chemical reactions needed for growth
• Use models to predict how cells maintain internal balance and respond to environmental changes+ Show more

Learning Objectives

• Explain how exchange rates between reservoirs change carbon in the atmosphere over time.
• Distinguish short-term cycling from slow geologic movement of carbon through rocks.
• Describe how temperature and precipitation control when water stored in ice or groundwater returns to the cycle.+ Show more

Learning Objectives

• Explain how gravity provides the centripetal force that keeps objects in curved orbits
• Describe how orbital speed and distance relate as an object moves around a central body
• Use observations of repeating sky patterns to connect them to regular orbital periods

Learning Objectives

• Identify contact and non-contact forces in everyday situations
• Match forces to their push or pull effects
• Use opposing forces to predict how motion will change

Learning Objectives

• Describe the structure of DNA as a double helix and explain how base pairing stabilizes it
• Identify how the sequence of DNA bases relates to the information carried by genes
• Explain why DNA structure affects how genetic information is passed on

Learning Objectives

• Define power as the rate of energy transfer.
• Explain how efficiency compares useful output energy to input energy.
• Use input power, output power, and losses to interpret real-world performance.

Learning Objectives

• Define observable properties and explain why they are useful for identifying materials.
• Distinguish between physical properties and ways we measure or describe them.
• Use examples of colour, hardness, conductivity, density, and solubility to classify substances.

Learning Objectives

• Describe matter using a particulate model with discrete particles
• Explain how particle motion and spacing relate to diffusion
• Use kinetic energy and collisions to justify differences between solids, liquids, and gases+ Show more

Learning Objectives

• Distinguish series and parallel connections in a mixed (combined) circuit
• Predict how voltage and current behave within series vs. parallel branches
• Use circuit reasoning to trace where current can split and where it must remain the same

Learning Objectives

• Use allele combinations of parents to predict expected phenotype proportions in offspring
• Explain how dominant alleles can mask recessive alleles in observed traits
• Justify trait predictions using probability patterns across multiple generations

Learning Objectives

• Explain why electrical safety standards exist and what hazards they reduce
• Identify what grounding, overcurrent protection, and insulation are meant to do
• Interpret basic device label terms (grounding, rating, and approved use) in everyday scenarios+ Show more

Learning Objectives

• Explain how friction acts as a resistance force that opposes motion.
• Use vocabulary from a science text to interpret cause-and-effect relationships.
• Distinguish factors that increase or decrease friction in everyday situations.

Learning Objectives

• Identify cause-and-effect links between propagation choices and genetic diversity.
• Explain how chromosomes and Mendelian patterns can transmit selected traits.
• Describe variation sources and how selection can change trait frequencies in populations over generations.+ Show more

Learning Objectives

• Identify observable evidence of chemical change from acid deposition on limestone
• Explain particulate and atomic ideas for how acids affect carbonate minerals
• Use mass conservation ideas to describe measurable mass changes across a system boundary

Learning Objectives

• Interpret acceleration as the rate and direction of change of velocity using speed-time information.
• Determine whether acceleration is roughly constant or changing from distance-time and speed-time patterns.
• Use the shape of a distance-time or speed-time graph to explain changes in slope or curvature over time.

Learning Objectives

• Explain how alleles form genotypes and how genotypes map to phenotypes.
• Use dominant and recessive inheritance relationships to predict trait outcomes.
• Interpret heredity evidence across generations using correct genotype–phenotype reasoning.+ Show more

Learning Objectives

• Describe the main functions of various organ systems involved in maintaining human physiology.
• Explain how different organ systems communicate and coordinate actions to sustain homeostasis.
• Identify the roles of the circulatory, respiratory, digestive, renal, nervous, and endocrine systems.+ Show more

Learning Objectives

• Describe key events of September 11, 2001 and their impact on the United States.
• Identify examples of heroism and community response shown in remembrance narratives.
• Explain how collective memory shapes national identity and understanding of patriotism.

Learning Objectives

• Describe the types of intermolecular forces and their effects on physical properties.
• Differentiate between London dispersion forces, dipole–dipole interactions, and hydrogen bonding.
• Explain how molecular size and polarity influence the strength of intermolecular forces.+ Show more

Learning Objectives

• Explain how slope on a displacement–time graph relates to velocity.
• Explain how slope on a velocity–time graph relates to acceleration.
• Use area under a velocity–time graph to determine displacement.+ Show more

Learning Objectives

• Identify the purpose of grounding, overcurrent protection, and proper insulation in preventing electrical hazards.
• Interpret labels on common electrical protective devices to determine their intended function.
• Explain how environmental conditions (moisture, outdoor use, and corrosion risk) affect safe installation choices.+ Show more