Grade 9 Science Worksheets

Learning Objectives

• Understand the basic principles of Mendelian inheritance.
• Identify dominant and recessive traits in organisms.
• Differentiate between Mendelian and non-Mendelian inheritance patterns.

Learning Objectives

• Understand the difference between series and parallel circuits
• Identify characteristics of each circuit type
• Apply basic principles to distinguish circuit configurations

Learning Objectives

• Understand the process of phase changes in terms of energy transfer and particle motion.
• Identify the energy involved in melting, vaporization, sublimation, and condensation.
• Explain how temperature remains constant during certain phase transitions despite energy transfer.+ Show more

Learning Objectives

• Use conservation of mass and typical chemical patterns to predict likely reaction products.
• Classify reactions by type (synthesis, decomposition, oxidation, neutralization) and connect each type to common outcomes.
• Justify predicted products by checking element balance, charge balance, and observable clues.

Learning Objectives

• Explain how Earth’s magnetic field is generated in the core and how field lines behave near Earth’s surface
• Describe declination and dip and predict how they affect compass use, surveying, and magnetic instruments
• Connect Earth’s magnetism to ionospheric phenomena such as auroras and to real-world navigation and monitoring needs

Learning Objectives

• Distinguish primary (P), secondary (S), and surface seismic waves by their motion and how they propagate through Earth.
• Explain how earthquake focal mechanisms reveal fault types and infer stress orientations.
• Use seismic wave travel times to describe how Earth’s interior structure can be modeled and how epicentres and magnitudes are estimated.+ Show more

Learning Objectives

• Explain how sex chromosomes (X and Y) influence inheritance patterns.
• Distinguish X-linked recessive inheritance from autosomal inheritance in terms of risk to males and females.
• Describe dosage compensation and hemizygosity and how these mechanisms affect gene expression.+ Show more

Learning Objectives

• Explain how changes in surface albedo can either amplify or reduce climate warming through feedback loops.
• Use cause-and-effect reasoning to describe how melting ice and snow influence the amount of solar energy absorbed by Earth.
• Analyze how clouds and vegetation can create additional albedo-related feedbacks at regional scales.+ Show more

Learning Objectives

• Differentiate heterogeneous mixtures from homogeneous solutions using the idea of uniformity.
• Identify solute, solvent, and concentration in common examples such as saline lake water.
• Explain how physical properties can be used to separate components without chemical change.+ Show more

Learning Objectives

• Identify and label all external forces acting on an isolated object in a free body diagram.
• Determine the direction of each force vector and distinguish forces that cancel from forces that produce net force.
• Use net force and Newton’s second law concepts to predict acceleration and motion outcomes.

Learning Objectives

• Define evolution in terms of changes in heritable traits and allele frequencies over generations
• Explain how natural selection and genetic drift affect allele frequencies
• Describe how mutation and gene flow introduce variation and transfer alleles between populations+ Show more

Learning Objectives

• Explain how organelle form and abundance relate to specialized cellular functions.
• Compare structures such as smooth endoplasmic reticulum, mitochondria, vacuoles, and cilia/flagella across cell types and taxa.
• Use the structure–function relationship to make predictions from cellular diagrams or descriptions.

Learning Objectives

• Explain how energy transfer during phase changes affects particle motion and potential energy.
• Describe heating and cooling processes using temperature plateaus and qualitative heating curves.
• Distinguish melting, vaporization, sublimation, and condensation in terms of latent heat and energy flow.

Learning Objectives

• Explain how collision frequency, activation energy, and reaction pathways influence reaction rate
• Use temperature, concentration, and catalysts to predict changes in reaction rate
• Apply reaction order and rate laws to relate measurable rate to reactant concentration

Learning Objectives

• Model ionic, covalent, and metallic bonding using electron transfer or electron sharing ideas
• Explain how polarity and bond energy relate to the stability of substances
• Connect bonding type to macroscopic properties such as melting point, conductivity, and solubility

Learning Objectives

• Describe the semi-conservative nature of DNA replication.
• Identify roles of key enzymes involved in DNA duplication.
• Explain the significance of replication fidelity and timing for genome stability.+ Show more

Learning Objectives

• Explain how impulse relates to momentum change in collisions using force and contact time
• Interpret force–time profiles to predict how contact duration affects the resulting motion
• Distinguish elastic and inelastic collisions using kinetic energy and energy transformations+ Show more

Learning Objectives

• Explain how computational simulations generate predictions from hypothesized mechanisms
• Describe how parameter sensitivity and scenario comparisons help evaluate model behavior
• Use ensembles and visualizations to represent uncertainty in forecasts+ Show more

Learning Objectives

• Understand how feedback loops, redundancy, and cross-regulation contribute to system coordination in the body.
• Identify examples of multi-system responses during exercise and how they maintain homeostasis.
• Explain how disruptions in one component can cascade and affect overall organism health.+ Show more

Learning Objectives

• Understand how changes in wave parameters affect wave signals.
• Relate wave frequency, wavelength, and amplitude to wave energy and patterns.
• Translate between different wave representations based on wave parameters.+ Show more

Learning Objectives

• Explain how climate variability is identified by comparing multiple weather-related measurements over long time periods.
• Differentiate variability from persistent climate change using evidence from temperature, precipitation, and wind or humidity records.
• Use examples such as El Niño–related ocean-atmosphere shifts to describe how boundary-condition changes alter regional weather statistics.

Learning Objectives

• Understand the basic concepts of particles in different states of matter.
• Explain how particle motion and arrangement determine the properties of solids, liquids, and gases.
• Relate particle energy to temperature and kinetic energy.+ Show more

Learning Objectives

• Interpret coefficients as mole ratios in balanced chemical equations
• Convert reactant masses between grams and moles using molar mass
• Calculate theoretical product amounts using stoichiometric ratios+ Show more

Learning Objectives

• Explain how temperature, pressure, and concentration affect reaction rates
• Explain how catalysts affect reaction pathways and reaction rates
• Predict how changing conditions can shift product distribution at equilibrium+ Show more

Learning Objectives

• Explain the role of simple computational simulations and numerical models in forecasting.
• Describe how ensembles and visualizations represent forecast uncertainty.
• Understand how discrepancies between simulated and observed data inform model refinement.+ Show more

Learning Objectives

• Describe how an electric motor converts electrical energy into mechanical work
• Explain how a generator produces electrical energy using electromagnetic induction
• Compare motor and generator functions based on energy flow in a simple system+ Show more

Learning Objectives

• Describe the key pathways of cellular energy metabolism, including glycolysis, the citric acid cycle, and oxidative phosphorylation.
• Explain how mitochondrial structure supports ATP production.
• Contrast aerobic and anaerobic energy pathways and their tissue-specific relevance.+ Show more

Learning Objectives

• Explain how Earth’s rotation and orbit produce observable cycles such as day–night and seasonal changes.
• Differentiate sidereal periods from solar periods and describe how this affects what we observe from Earth.
• Use basic orbital geometry and apparent motion concepts to interpret patterns in the night sky.+ Show more

Learning Objectives

• Explain how oceanic lithosphere subducts and how that process forms trenches and volcanic arcs.
• Describe how slab dehydration drives melting that fuels arc volcanism.
• Summarize how megathrust faults generate earthquakes and tsunamis at subduction interfaces.+ Show more

Learning Objectives

• Describe the structure and properties of different types of crystal lattices.
• Explain how unit cells define the repeating patterns in solids.
• Identify characteristics of ionic, metallic, and covalent network lattices.+ Show more

Learning Objectives

• Explain how energy transfer efficiency changes biomass across trophic levels
• Interpret evidence from biomass, population trends, and nutrient concentrations
• Describe how decomposition returns matter and supports nutrient cycling+ Show more

Learning Objectives

• Explain how DNA and RNA are built from nucleotide subunits and how their structures differ
• Describe DNA double-helix features (antiparallel strands and complementary base pairing) and how this supports replication
• Connect nucleic acid structure to genetic information flow from DNA to RNA to protein

Learning Objectives

• Explain how greenhouse gases influence Earth’s energy balance using the concept of outgoing longwave radiation and radiative forcing.
• Describe how both natural and human sources affect greenhouse gas concentrations over time.
• Analyze how climate responses can be influenced by interactions with clouds and surface properties.

Learning Objectives

• Define key genetic terms: genes, alleles, genotypes, phenotypes
• Explain how dominant and recessive traits are inherited
• Identify inherited traits based on genetic diagrams+ Show more

Learning Objectives

• Explain how proton count and chemical symbols determine an element’s identity
• Describe how atomic models represent element identity and particle changes
• Use atomic mass, natural occurrence, and symbolic notation to classify and interpret element properties

Learning Objectives

• Explain how the hypothalamus connects neural signals to hormonal control through releasing factors.
• Describe the roles of portal vessels and fenestrated capillaries in neuroendocrine regulation.
• Identify tropic hormones and their effects on target organs involved in metabolism, growth, reproduction, and stress.

Learning Objectives

• Understand the basic concept of natural selection
• Identify examples of phenotypic variation in populations
• Differentiate between types of selection: directional, stabilizing, disruptive+ Show more

Learning Objectives

• Differentiate types of representation models (mathematical formulas, graphs, schematic diagrams, and computational approximations) and explain what each is best used for.
• Evaluate model selection using representational fidelity, parsimony, and predictive scope.
• Explain how mappings between model components and measurable observables support interpretation.+ Show more

Learning Objectives

• Explain how measurement accuracy depends on appropriate instruments, calibrated equipment, and consistent units.
• Use significant figures to reflect the precision justified by a measuring device and method.
• Convert between units and record data consistently to reduce misinterpretation.+ Show more

Learning Objectives

• Understand the different types of variables in scientific investigations.
• Learn how controlled variables influence experiment outcomes.
• Identify independent, dependent, and controlled variables in example scenarios.+ Show more

Learning Objectives

• Define and explain the concept of mechanical advantage in simple machines.
• Calculate mechanical advantage for levers, pulley systems, and wheel systems.
• Analyze trade-offs between force reduction and displacement increase in different machines.+ Show more

Learning Objectives

• Define electric current, voltage, and resistance and relate each to how charges behave in circuits.
• Use correct units, symbols, and typical magnitudes to interpret electrical situations and instrument readings.
• Apply comparisons of current, voltage, and resistance to real-world contexts such as household wiring and heating elements.

Learning Objectives

• Understand human impacts on watershed processes through urbanization, deforestation, agriculture, and infrastructure.
• Identify consequences of watershed alterations such as changes in runoff, sediment, nutrients, and groundwater recharge.
• Relate watershed changes to channel morphology, flood frequency, and aquatic ecosystem health.+ Show more

Learning Objectives

• Explain the sequence of lunar phases and how they occur due to the Sun-Earth-Moon geometry.
• Describe how the fraction of the illuminated Moon affects its appearance and brightness.
• Predict the progression of lunar phases over the lunar month.+ Show more

Learning Objectives

• Understand how inclined planes decompose gravitational force into components parallel and perpendicular to the surface.
• Explain the concept of mechanical advantage and how it reduces applied force over longer distances.
• Analyze the effects of friction and slope angle on acceleration and energy transfer during motion.+ Show more

Learning Objectives

• Understand the role of enzymes as biological catalysts and how they lower activation energy.
• Describe the structural features of enzymes that influence substrate specificity and catalysis.
• Explain the functions of cofactors and coenzymes in enzyme activity.+ 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.
• Analyze how watershed characteristics, porosity, and permeability affect water flow and distribution.+ Show more

Learning Objectives

• Distinguish heterogeneous mixtures from homogeneous solutions based on uniformity
• Define solute, solvent, and concentration, and explain how concentration relates to solution properties
• Use physical properties to separate mixture components without chemical change