Grade 9 Science Worksheets

Learning Objectives

• Use residuals and diagnostic graphical patterns to judge whether a model matches empirical data.
• Apply goodness-of-fit ideas to decide when a model is acceptable versus when it should be revised.
• Explain how heteroscedasticity and missing-variable clues motivate alternate hypotheses.

Learning Objectives

• Understand the structure of evidence-based reasoning in science.
• Identify different types of evidence and their roles in supporting claims.
• Analyze how multiple representations strengthen inference chains.+ Show more

Learning Objectives

• Explain how a chemical change forms new substances with different properties and composition.
• Identify observable evidence of chemical changes such as temperature change, gas formation, and precipitate formation.
• Distinguish chemical evidence from physical rearrangement of matter using the particle-level (microscopic) viewpoint.

Learning Objectives

• Identify and distinguish common reaction types: synthesis, decomposition, single/double displacement, and combustion.
• Predict likely products from reactants by using particle and bonding patterns.
• Explain how conservation of mass constrains reaction outcomes and evidence from observations.

Learning Objectives

• Explain how the number of protons and the chemical symbol identify an element.
• Describe how atomic models help represent the identity of atoms and elements.
• Classify elements as metals or nonmetals and use examples (iron, carbon, oxygen).+ Show more

Learning Objectives

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

Learning Objectives

• Define physical properties as observable or measurable characteristics that do not change a substance’s chemical identity.
• Identify and distinguish common intensive and extensive physical properties in everyday materials.
• Explain how physical properties can be used to classify materials and choose separation or testing methods.

Learning Objectives

• Describe physical changes as changes in state or form that keep the same chemical identity.
• Differentiate reversible and irreversible physical transformations using everyday examples.
• Explain how energy transfer is involved in melting, freezing, evaporation, and condensation.+ Show more

Learning Objectives

• Explain how chemical formulas represent compounds as fixed combinations of elements and relate to the law of definite composition
• Differentiate covalent and ionic bonding and predict how bonding type can affect observable properties
• Use chemical formulas to describe elemental ratios and to distinguish compounds from mixtures

Learning Objectives

• Evaluate how everyday chemicals provide benefits while creating risks to health and the environment.
• Use chemical properties and exposure routes to explain why some substances persist or spread.
• Apply evidence-based reasoning to compare safe handling, disposal, and regulatory options.

Learning Objectives

• Distinguish between homogeneous and heterogeneous mixtures using evidence such as visible phases
• Identify physical methods of separation and match them to differences in particle size, solubility, boiling point, and density
• Explain why physical separation preserves the chemical identity of mixture components

Learning Objectives

• Explain how isolating variables and using reference conditions support causal interpretation.
• Describe why replication and baseline characterization increase the credibility of results.
• Identify how residual confounding and uncontrolled variation weaken causal claims, even when patterns appear.

Learning Objectives

• Define power as the rate of energy transfer or work per unit time, including average and instantaneous formulations.
• Explain mechanical efficiency as the ratio of useful output energy or work to input energy, and identify sources of energy loss.
• Compare power ratings of different motors and analyze trade-offs involving mechanical advantage and efficiency in real-world machines.+ Show more

Learning Objectives

• Define power as the rate of energy transfer or work per unit time and understand its units.
• Explain mechanical efficiency and how it quantifies useful output relative to input energy.
• Identify factors such as friction and heat that cause energy losses in machines.+ Show more

Learning Objectives

• Interpret pedigrees using standardized symbols and relationship patterns across generations
• Differentiate autosomal dominant, autosomal recessive, X-linked, and mitochondrial inheritance using affected and carrier information
• Apply probability reasoning from pedigrees to estimate risk for relatives

Learning Objectives

• Explain the different types of intermolecular forces and how they influence physical properties.
• Compare the strengths of London dispersion forces, dipole–dipole interactions, and hydrogen bonds.
• Relate molecular structure to the behavior and physical properties of substances.+ Show more

Learning Objectives

• Understand the relative motions of the Moon, Earth, and Sun that produce different Moon phases.
• Explain how the geometry of the Earth-Moon-Sun system causes eclipses.
• Describe the reasons why eclipses do not happen every month.+ Show more

Learning Objectives

• Understand the components of scientific arguments including claim, evidence, and reasoning.
• Evaluate the coherence, relevance, and strength of evidence in scientific arguments.
• Analyze how quantitative evidence and models contribute to argument strength.+ Show more

Learning Objectives

• Understand how Earth's axial tilt and orbit around the Sun cause seasonal changes.
• Explain how the angle of sunlight and day length vary with Earth's position in its orbit.
• Describe the relationship between solar energy received and Earth's seasons.+ Show more

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

• Understand how to compute work as the dot product of force and displacement, including the role of the cosine of the angle between them.
• Differentiate between constant force and variable force work calculations.
• Apply area-under-curve methods to approximate work for variable forces.+ Show more

Learning Objectives

• Understand how human activities alter biodiversity and ecosystem services.
• Identify different types of land conversion, pollution, and resource extraction impacts.
• Analyze effects of habitat fragmentation and invasive species on ecological community structure.+ Show more

Learning Objectives

• Understand how gene expression is regulated through transcription factors, enhancers, and silencers.
• Explain the role of epigenetic modifications such as DNA methylation and histone acetylation in gene regulation.
• Describe how regulatory networks and feedback loops help cells respond to developmental and environmental cues.+ Show more

Learning Objectives

• Describe the orbital motions of Earth, Moon, and Sun and relate them to observable cycles.
• Explain how Earth's rotation causes day-night cycles and distinguish between sidereal and solar periods.
• Connect gravitational interactions among Earth, Moon, and Sun to tidal phenomena and orbital stability.+ Show more

Learning Objectives

• Describe the characteristics of ionic bonds
• Explain how ionic bonds influence material properties
• Identify properties associated with ionic bonds+ Show more

Learning Objectives

• Explain the role of computational simulations and numerical models in scientific predictions.
• Describe how ensembles and visualizations express uncertainty in forecasts.
• Identify how simulation outputs are compared to empirical data to refine models.+ Show more

Learning Objectives

• Define allele, genotype, and phenotype using correct science vocabulary
• Distinguish dominant and recessive alleles in single-gene crosses
• Use simple Punnett square logic to predict offspring outcomes

Learning Objectives

• Understand how inclined planes decompose gravitational forces into components.
• Explain the concept of mechanical advantage and how it reduces required force.
• Analyze the effects of friction and slope angle on motion and energy transfer.+ Show more

Learning Objectives

• Understand ecological, economic, and health considerations of genetic technologies.
• Evaluate potential risks such as gene flow, resistance, and market impacts.
• Identify benefits including therapeutic opportunities and crop improvements.+ Show more

Learning Objectives

• Understand the fundamental mechanisms of evolution including natural selection, genetic drift, mutation, and gene flow.
• Explain how these mechanisms influence allele frequencies and lead to changes in populations over generations.
• Describe the long-term effects of evolution on traits and genetic diversity within species.

Learning Objectives

• Understand the hierarchical structure of biological classification systems.
• Identify traditional and modern approaches to classifying living organisms.
• Compare morphological, developmental, and genetic data used in taxonomy.+ Show more

Learning Objectives

• Define speciation and understand its role in biodiversity.
• Differentiate between allopatric and sympatric speciation.
• Identify reproductive barriers that contribute to speciation.+ Show more

Learning Objectives

• Understand the concept of natural selection and its role in evolution.
• Identify examples of natural selection in real-world scenarios.
• Differentiate between types of selection: directional, stabilizing, and disruptive.+ Show more

Learning Objectives

• Understand different lines of evidence supporting evolutionary relationships.
• Identify how fossil, anatomical, and molecular data contribute to understanding biodiversity over time.
• Compare and evaluate various types of evidence used in evolutionary studies.+ Show more

Learning Objectives

• Describe how fossils provide evidence for past life and evolutionary history.
• Identify types of fossils and their significance in stratigraphy.
• Explain how stratigraphic context and dating methods determine fossil ages.+ Show more

Learning Objectives

• Explain how cellular structures support specific functions (information storage, energy conversion, and selective exchange).
• Connect organism-level body structures and tissues to their functional needs (protection, movement, support).
• Use models to justify how a feature’s physical properties enable biological tasks.

Learning Objectives

• Explain how allele combinations in parents determine genotype outcomes in offspring using probability.
• Predict expected phenotype frequencies across multiple generations, accounting for dominant and recessive alleles.
• Use evidence from family patterns and cross results to justify trait-frequency predictions.

Learning Objectives

• Understand the factors affecting chemical reaction rates and equilibrium.
• Identify how temperature, pressure, concentration, and catalysts influence reaction outcomes.
• Apply principles of kinetics and equilibrium to real-world chemical processes.+ Show more

Learning Objectives

• Understand the concept of reaction stoichiometry and how it relates quantities of reactants and products in chemical reactions.
• Apply molar mass conversions to relate moles, mass, and particle counts in balanced chemical equations.
• Analyze limiting reagents and calculate theoretical yields in chemical reactions.+ Show more

Learning Objectives

• Describe the processes involved in the water cycle, including evaporation, condensation, precipitation, infiltration, runoff, and groundwater flow.
• Explain the concept of residence time in different water reservoirs and how fluxes control water availability.
• Analyze how watershed characteristics, porosity, and permeability influence water movement and partitioning.+ Show more

Learning Objectives

• Describe how cells communicate using chemical and electrical signals.
• Identify key components of signal transduction pathways.
• Explain the different types of cellular signaling (autocrine, paracrine, endocrine, synaptic).+ Show more

Learning Objectives

• Understand the concept of work as a dot product of force and displacement and its dependence on the angle between them.
• Differentiate between constant-force and variable-force work calculations.
• Apply area-under-the-curve methods to approximate work done by variable forces in common scenarios.+ Show more

Learning Objectives

• Understand how conservation of mass applies to balanced chemical equations.
• Relate moles, mass, and particle counts through molar mass conversions.
• Perform limiting reagent analysis and calculate theoretical yields.+ Show more

Learning Objectives

• Understand the concept of reaction stoichiometry and its basis in conservation of mass.
• Learn to interpret and balance chemical equations correctly.
• Apply mole conversions between mass, moles, and particle counts.+ Show more

Learning Objectives

• Understand the relationship between particle arrangement and material properties in different lattice types.
• Identify characteristics of ionic, covalent network, and molecular solids based on their structure and observed physical properties.
• Analyze how melting point, electrical conductivity, hardness, and solubility reflect lattice organization and interparticle forces.+ Show more

Learning Objectives

• Understand the mechanisms involved in thermoregulation and homeostasis.
• Identify how the hypothalamus detects and orchestrates responses to temperature changes.
• Describe the roles of skin blood flow, sweat production, shivering, and metabolic adjustments in temperature regulation.+ Show more

Learning Objectives

• Explain the composition and function of various organ tissues.
• Describe how organs and organ systems work together to sustain life.
• Identify examples of organ systems and their key organs.+ Show more

Learning Objectives

• Describe key structural differences between prokaryotic and eukaryotic cells.
• Identify components found in eukaryotic cells but absent in prokaryotes.
• Explain how these differences influence cell function and organism complexity.+ Show more