Grade 9 Science Worksheets

Learning Objectives

• Describe the different sources of energy within Earth systems, including solar radiation and geothermal heat.
• Explain the mechanisms of energy transfer such as conduction, convection, and radiation.
• Analyze how energy gradients influence atmospheric, oceanic, and geological processes.+ Show more

Learning Objectives

• Explain how resistance and resilience differ in ecosystems facing disturbance.
• Describe how feedback loops, variability, and connectivity influence ecosystem recovery.
• Identify how crossing ecological thresholds can trigger regime shifts to new community states.+ Show more

Learning Objectives

• Understand the process of diffusion and how molecules move from high to low concentration.
• Describe the role of facilitated diffusion and osmosis in cellular transport.
• Identify active transport and distinguish it from passive processes.+ Show more

Learning Objectives

• Describe the structure and function of the heart and blood vessels in the circulatory system.
• Explain the mechanisms of capillary exchange, including filtration and reabsorption.
• Identify the components of blood and their roles in transport capacity.+ Show more

Learning Objectives

• Explain how chemical reactions involve energy transfer through bond breaking and formation.
• Differentiate between endothermic and exothermic reactions based on energy diagrams.
• Describe quantitative measures of energy change, such as enthalpy, in chemical processes.+ Show more

Learning Objectives

• Understand the definitions of electric current, voltage, and resistance as fundamental electrical quantities.
• Interpret units, symbols, and typical magnitudes related to electrical measurements in regional contexts.
• Apply quantitative reasoning to analyze energy transfer, component selection, and instrument readings in electrical systems.+ Show more

Learning Objectives

• Understand the principles of conservation of mass in chemical reactions.
• Relate moles, mass, and particle counts using molar mass conversions.
• Perform limiting reagent analysis and calculate theoretical yields.+ Show more

Learning Objectives

• Understand how temperature, pressure, concentration, and catalysts influence chemical reactions.
• Explain the principles of equilibrium and kinetics in reaction systems.
• Analyze how reaction conditions affect product yield and selectivity.+ Show more

Learning Objectives

• Understand the role of fossil records in studying Earth's history.
• Identify how stratigraphy and radiometric dating determine fossil ages.
• Explain the significance of transitional fossils and preservation bias.+ Show more

Learning Objectives

• Explain how constraints limit possible designs and how criteria define what success looks like.
• Analyze trade-offs among cost, time, materials, safety, and reliability in engineering decisions.
• Use evidence to justify a design choice when multiple criteria conflict.

Learning Objectives

• Understand the mathematical formulation of Newton's second law in vector form.
• Differentiate between mass and weight and their roles in dynamics.
• Analyze how net force relates to acceleration and inertia in physical systems.+ Show more

Learning Objectives

• Understand the types of intermolecular forces and their effects on physical properties of substances.
• Identify how molecular structure influences intermolecular interactions such as London dispersion forces, dipole–dipole interactions, and hydrogen bonding.
• Relate the strength of intermolecular forces to properties like boiling point, viscosity, and surface tension.+ Show more

Learning Objectives

• Understand different measures of dispersion and distribution shape, including variance, interquartile range, range, and coefficient of variation.
• Interpret how each variability metric informs confidence in statistical estimates and comparisons.
• Relate measures of variability to sampling design, heterogeneity across groups, and theoretical models.+ Show more

Learning Objectives

• Describe different types of scientific models including mathematical formulae, graphs, schematics, and computational approximations.
• Explain the criteria for selecting appropriate models based on fidelity, simplicity, and predictive ability.
• Understand how mapping model components to measurable observables aids interpretation.+ Show more

Learning Objectives

• Explain how molecules move across cell membranes through passive and active processes.
• Differentiate between diffusion, facilitated diffusion, osmosis, and active transport.
• Describe vesicular transport mechanisms such as endocytosis and exocytosis.+ Show more

Learning Objectives

• Understand the basic form and components of kinematic equations.
• Apply kinematic equations to solve for distance, velocity, and acceleration.
• Interpret real-world problems involving motion using the equations.+ Show more

Learning Objectives

• Describe the structure and function of the nephron in blood filtration and urine formation.
• Explain the process of glomerular filtration driven by hydrostatic and oncotic pressures.
• Analyze tubular mechanisms for reabsorbing water and solutes during urine concentration.+ Show more

Learning Objectives

• Explain how multiple simple machines combine to form compound machines and analyze their mechanical advantage.
• Calculate overall mechanical advantage using force and displacement relationships in compound systems.
• Differentiate between ideal and actual mechanical advantage, and understand the effects of friction and deformation.+ Show more

Learning Objectives

• Explain how work depends on force and distance and how units connect to energy transfer
• Describe how simple machines change force magnitude and/or direction
• Use mechanical advantage and trade-offs (force vs distance) to predict machine performance

Learning Objectives

• Identify the four principal tissue classes and their key features.
• Describe examples of specialized epithelial, connective, and muscle tissues.
• Explain how tissue architecture relates to organ function.+ Show more

Learning Objectives

• Identify and describe the four principal tissue classes: epithelial, connective, muscle, and nervous.
• Explain the cellular composition and extracellular matrix roles of each tissue type.
• Differentiate specialized epithelial tissues for absorption and secretion.+ Show more

Learning Objectives

• Explain how distance and time relate to speed using data and graphs
• Describe how changing speed over time indicates acceleration
• Distinguish constant speed (linear distance–time pattern) from changing speed (nonlinear pattern)

Learning Objectives

• Explain how conservation of atoms applies to mass measurements during chemical reactions within a defined system boundary.
• Distinguish between open and closed systems and predict how gas escape affects observed (measured) mass.
• Evaluate how instrument sensitivity and external influences can change measured values while conserving total atomic mass in the system.

Learning Objectives

• Explain how Earth’s rotation produces apparent diurnal motion of celestial objects across the sky.
• Describe how Earth’s revolution around the Sun leads to apparent annual changes in which stars are visible at night.
• Use celestial coordinate ideas (altitude and azimuth) to reason about rising and setting from an Earth observer’s viewpoint.+ Show more

Learning Objectives

• Identify the differences between primary and secondary succession
• Explain key processes and species changes during succession
• Understand factors influencing ecosystem recovery and stability

Learning Objectives

• Define and identify different trophic levels within an ecosystem.
• Describe how food chains and food webs illustrate energy flow.
• Explain the concepts of trophic efficiency and trophic cascades.+ Show more

Learning Objectives

• Understand the hierarchy from molecules to organisms
• Identify the properties of each level of biological organization
• Explain how emergent properties develop at higher levels+ Show more

Learning Objectives

• Distinguish chemical changes from physical changes by using evidence that new substances form.
• Identify observable indicators of chemical change such as temperature change, gas production, precipitate formation, and persistent color change.
• Explain reactant-to-product transformation using the idea of particles at the microscopic level.

Learning Objectives

• Explain how quantitative measurements constrain scientific claims about motion, forces, energy transfer, and waves.
• Use models to describe patterns and connect variables in a claim, then judge how well the model matches evidence.
• Compare competing explanations by using accuracy, expected relationships, and stated assumptions.

Learning Objectives

• Explain how circulatory, respiratory, digestive, and renal systems contribute to maintaining internal balance
• Describe how nervous and endocrine signaling help coordinate organ systems during changing conditions
• Use cause-and-effect reasoning to connect changes in one system to responses in other systems

Learning Objectives

• Understand the concept of adaptive radiation and its significance in evolution.
• Identify key factors that drive diversification of species in new environments.
• Analyze the processes of ecological speciation and niche partitioning.+ Show more

Learning Objectives

• Understand the differences between solar and lunar eclipses
• Learn how the Sun, Earth, and Moon align to produce eclipses
• Identify the conditions necessary for each type of eclipse+ Show more

Learning Objectives

• Identify the main idea of a biotechnology text and use details to support it.
• Explain how selective breeding and hybridization can change traits in crops or livestock over generations.
• Connect genetic technology choices to potential benefits and limitations.

Learning Objectives

• Understand the role of genes as DNA segments coding for proteins.
• Explain the processes of transcription and translation in protein synthesis.
• Identify how gene regulation influences phenotypic traits in crops and livestock.+ Show more

Learning Objectives

• Understand the key differences between prokaryotic and eukaryotic cells.
• Identify structural components unique to each cell type.
• Explain how cellular organization influences biological functions.+ Show more

Learning Objectives

• Describe the structure and function of the cardiovascular system.
• Explain how blood flow is regulated to meet tissue demands.
• Identify components of blood and their roles in transport.+ Show more

Learning Objectives

• Explain how kinematics, net-force reasoning, and energy considerations work together to predict complex motion.
• Use force balance and energy ideas to determine acceleration and changes in speed during braking.
• Interpret how graphs and equations combine to estimate stopping distance under varying conditions.

Learning Objectives

• Explain how power relates to the rate of energy transfer in everyday and engineering systems
• Calculate and interpret efficiency as the fraction of input energy converted to useful output
• Identify major sources of energy loss and describe how they affect operational limits and design trade-offs

Learning Objectives

• Differentiate speed, velocity, and acceleration using scalar vs. vector ideas and direction conventions.
• Use basic kinematics relationships and unit conversions to compare motion in real contexts.
• Interpret sign conventions for motion and determine whether acceleration is increasing or decreasing velocity.

Learning Objectives

• Identify the sequence of events in gene expression
• Explain how transcription and translation convert genetic information into a polypeptide
• Recognize the roles of mRNA, codons, and tRNA in building proteins

Learning Objectives

• Understand the concept of work as energy transfer by force and displacement.
• Identify how simple machines change the magnitude or direction of applied forces.
• Explain the relationships among force, distance, work, and mechanical advantage in practical contexts.+ Show more

Learning Objectives

• Describe how feedback loops contribute to multi-system coordination in the body.
• Explain the roles of neural, hormonal, and local signals in mediating organism responses.
• Analyze how disruptions in one component of system coordination can cascade to affect overall homeostasis.+ Show more

Learning Objectives

• Define homeostasis and understand its significance in maintaining internal body conditions.
• Identify the roles of sensors, integrating centers, and effectors in feedback mechanisms.
• Describe how various body systems contribute to homeostasis, including respiratory, circulatory, endocrine, renal, and nervous systems.

Learning Objectives

• Identify major eukaryotic organelles and describe their specific functions
• Explain how organelle structure and molecular composition support cellular tasks
• Connect organelle roles to how different tissues carry out specialized activities

Learning Objectives

• Explain how the phospholipid bilayer creates a selective barrier using hydrophobic and hydrophilic regions.
• Describe how integral and peripheral proteins support transport, signaling, and structure in membranes.
• Connect membrane fluidity and selective permeability to cholesterol and the fluid mosaic model.

Learning Objectives

• Explain how genes are regulated through promoter, enhancer, silencers, and transcription factors.
• Describe epigenetic modifications such as DNA methylation and histone acetylation and their effects on gene expression.
• Analyze how regulatory networks and feedback loops respond to developmental and environmental signals.+ Show more

Learning Objectives

• Interpret molecular and phenotypic data to infer inheritance patterns.
• Compare observed genotype and phenotype frequencies with expected ratios.
• Identify variants through PCR-based markers, single nucleotide variants, and sequencing reads.+ Show more

Learning Objectives

• Describe the semi-conservative nature of DNA replication.
• Identify key enzymes involved in DNA replication and their functions.
• Explain the differences between leading and lagging strand synthesis.+ Show more