Grade 9 Science Worksheets

Learning Objectives

• Explain energy conservation using the idea of system boundaries for open and closed systems.
• Use an energy bookkeeping approach (reservoirs and transfers) to track energy changes quantitatively.
• Interpret and construct simple energy flow diagrams for mechanical and electrical (or chemical) processes.

Learning Objectives

• Understand the three fundamental laws of motion proposed by Sir Isaac Newton.
• Identify real-world examples illustrating each of Newton's laws.
• Explain how forces influence the motion of objects in different scenarios.+ Show more

Learning Objectives

• Understand how environmental exposures impact cellular processes and organ systems.
• Identify common pollutants and toxicants and their effects on human health.
• Explain concepts of dose-response and vulnerability factors in environmental health.+ Show more

Learning Objectives

• Explain how disturbances can change ecosystem stability by altering species interactions and environmental conditions.
• Describe resilience and recovery rate, including the role of feedback processes in ecosystem response.
• Use long-term evidence (population trends and community structure) to distinguish gradual shifts from rapid transitions.

Learning Objectives

• Understand the sequence and causes of lunar phases
• Identify different types of solar and lunar eclipses
• Describe the conditions necessary for eclipses to occur+ Show more

Learning Objectives

• Explain how protons, neutrons, and electrons define atomic number and mass number
• Describe how isotopes of an element differ and why they still count as the same element
• Use simple nuclear and electron-shell models to predict basic chemical behaviour+ Show more

Learning Objectives

• Explain how cells, tissues, organs, and systems form a hierarchy
• Describe how organ systems couple functions to support homeostasis
• Model how nervous and endocrine signals coordinate body regulation+ Show more

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

• Understand the basic structure and functions of cells
• Identify different levels of organization in multicellular organisms
• Explain how cells form tissues, tissues form organs, and organs form organ systems+ Show more

Learning Objectives

• Explain how predator-prey, competition, and mutualism connect species in an ecosystem network.
• Describe how abiotic factors like temperature and nutrient availability can change survival and population size.
• Use interaction networks to predict how changes in one population can cascade through a community.

Learning Objectives

• Explain how multicellular organisms are organized from cells to tissues, organs, and organ systems.
• Describe how specialized structures at smaller scales support functions at larger scales (support, transport, regulation, coordination).
• Use evidence from a scientific description to predict how changes at one level can affect higher levels of organization.

Learning Objectives

• Explain how cells, tissues, organs, and organ systems form a hierarchy in multicellular organisms.
• Describe how functions at one level depend on functions at smaller levels.
• Use examples to connect structure to specific processes such as transport, support, regulation, and coordination.

Learning Objectives

• Explain how cells, tissues, organs, and organ systems work together to maintain complex functions in multicellular organisms.
• Describe how specialization at smaller scales supports processes such as support, transport, regulation, and coordination at larger scales.
• Use cause-and-effect reasoning to connect structure at one level to function at the next level.

Learning Objectives

• Explain how energy transforms between mechanical, thermal, sound, and electrical forms within a chosen system
• Use energy-balance reasoning to predict how friction and air resistance change motion outcomes
• Describe how temperature changes can affect material behavior and device performance

Learning Objectives

• Analyze how land-use change, invasive species, pollution, and resource extraction affect biodiversity and ecosystem services.
• Interpret case studies such as deforestation, coral reef degradation, and agricultural runoff to evaluate environmental impacts.
• Assess trade-offs between conservation efforts and provisioning services in socioecological contexts.+ Show more

Learning Objectives

• Explain how temperature differences create pressure gradients that drive wind and atmospheric circulation.
• Describe how water vapor changes phase to form clouds and produce precipitation.
• Compare energy transfer by radiation, conduction, and convection in shaping weather.+ Show more

Learning Objectives

• Analyze how land-use change, invasive species, pollution, and resource extraction impact biodiversity.
• Interpret case studies such as deforestation, coral reef degradation, and agricultural runoff.
• Evaluate trade-offs between conservation efforts, provisioning services, and socioecological outcomes.+ Show more

Learning Objectives

• Explain how energy transforms between forms while conserving total energy for a chosen system
• Describe how friction and air resistance convert mechanical energy into thermal energy
• Connect changes in temperature to motion through material behavior and density effects+ Show more

Learning Objectives

• Explain how gravity provides the centripetal force that keeps planets and moons in curved orbits
• Describe how orbital speed and orbital period relate to distance from the central body
• Use the idea of periodic motion to interpret predictable patterns in the night sky

Learning Objectives

• Understand the concept of adaptive radiation and its ecological significance.
• Identify key processes that drive diversification in species.
• Explain how ecological factors influence morphological and behavioral differentiation.+ Show more

Learning Objectives

• Explain how mechanical energy can change between kinetic and potential forms when forces do work.
• Use energy conservation and energy bookkeeping to predict feasible speeds and heights when losses are small.
• Identify how non-conservative forces (like friction and air resistance) dissipate mechanical energy.

Learning Objectives

• Calculate work using the dot-product idea: W = F d cos(θ) for constant force and displacement
• Differentiate work done by constant forces versus variable forces
• Approximate work for variable forces using areas under a force–distance graph+ Show more

Learning Objectives

• Explain the main biological processes involved in nutrient cycling.
• Identify how physical and human activities influence nutrient movement in ecosystems.
• Describe the impact of excess nutrients on aquatic systems and biodiversity.+ Show more

Learning Objectives

• Describe the main drivers influencing climate change, including greenhouse gases, albedo modifications, aerosols, and land-use feedbacks.
• Explain basic radiative transfer principles and the Earth's energy budget imbalance.
• Analyze how human activities affect the carbon cycle and climate projections.+ Show more

Learning Objectives

• Understand Earth's rotation and how it causes day and night
• Identify the observable effects of Earth's rotation from a terrestrial perspective
• Distinguish between solar and sidereal days+ Show more

Learning Objectives

• Understand the relationship between wave speed, frequency, and wavelength.
• Identify how changes in frequency affect wavelength in a given medium.
• Apply the wave speed formula to different scenarios involving waves.

Learning Objectives

• Understand basic metric units and their importance in scientific measurement.
• Learn about instrument resolution and how calibration affects measurement accuracy.
• Connect raw measurements to data representation through tables and graphs.+ Show more

Learning Objectives

• Explain how mechanical and chemical digestion prepare nutrients for absorption
• Describe how villi and microvilli increase intestinal surface area
• Compare transport routes for sugars, amino acids, and lipids+ Show more

Learning Objectives

• Explain how the Calvin cycle uses ATP and NADPH to fix carbon dioxide into organic molecules.
• Describe the main phases of the Calvin cycle: carbon fixation, reduction, and RuBP regeneration.
• Connect specific enzymes and intermediates (like RuBisCO and 3-carbon intermediates) to each phase.

Learning Objectives

• Explain how mutations can originate from errors during DNA copying.
• Describe how environmental factors such as radiation and chemicals can increase mutation rates.
• Distinguish between mutations that affect gene function/regulation and those that may have little phenotypic effect.+ Show more

Learning Objectives

• Understand the key functions of cell membranes and their role in regulating transport.
• Describe how cellular energy powers chemical reactions vital for cell survival and growth.
• Connect cell structure to function through models of internal balance, growth, and environmental response.+ Show more

Learning Objectives

• Understand how water vapor influences climate through feedback mechanisms
• Identify the processes that amplify or reduce greenhouse effects
• Explore the role of surface reflectivity and cloud cover in climate dynamics

Learning Objectives

• Understand how wave speed relates to frequency and wavelength.
• Explain the inverse relationship between frequency and wavelength in wave behavior.
• Apply the wave speed formula to different scenarios involving waves in various media.+ Show more

Learning Objectives

• Identify sources of solar energy that enter Earth's atmosphere.
• Describe pathways through which solar radiation and geothermal energy are transferred within Earth systems.
• Understand how energy gradients drive atmospheric and oceanic circulation.+ Show more

Learning Objectives

• Understand how the periodic table links atomic number to chemical properties.
• Identify trends in element behavior across periods and groups.
• Explain how electron arrangements influence reactivity and bonding tendencies.+ Show more

Learning Objectives

• Explain how changes in greenhouse gases can trigger climate feedbacks that amplify or reduce warming.
• Describe at least three feedback pathways involving water vapor, ice/snow albedo, and clouds.
• Use cause-and-effect reasoning to connect atmospheric processes to Earth’s energy balance (absorbed sunlight vs. outgoing infrared).

Learning Objectives

• Understand how to interpret family trees and pedigree charts to analyze inheritance patterns.
• Identify characteristics of autosomal dominant, autosomal recessive, X-linked, and mitochondrial inheritance modes.
• Apply principles of pedigree analysis to determine inheritance modes and predict genotypes.+ Show more

Learning Objectives

• Understand how the heart and lungs work together to supply oxygen and remove carbon dioxide
• Identify the roles of pulmonary ventilation and cardiovascular transport in gas exchange
• Explain how the body adjusts heart rate, stroke volume, and vascular resistance in response to respiratory needs+ Show more

Learning Objectives

• Identify the different parts of the human heart and understand their functions.
• Explain how the structure of the heart supports its role in circulatory health.
• Recognize the importance of organ organization for physiological processes.

Learning Objectives

• Explain how incoming solar radiation and outgoing infrared radiation drive Earth’s energy balance.
• Describe how energy moves through Earth system spheres using radiation, conduction, convection, and phase change.
• Interpret how energy balance affects long-term temperature patterns and Earth system processes.

Learning Objectives

• Interpret circuit diagram symbols and connection types to determine circuit topology and possible current paths
• Identify reference nodes and explain how node relationships support voltage measurements
• Use standardized notation to translate between physical components and schematic representations+ Show more

Learning Objectives

• Explain the processes of seafloor spreading, subduction zones, and volcanic arc systems.
• Connect mantle convection and faulting with surface features like mountain belts and bathymetry.
• Analyze geologic cross-sections and magnetic anomaly patterns as evidence for plate tectonics.+ Show more

Learning Objectives

• Explain the processes involved in the hydrologic cycle, including evaporation, condensation, precipitation, infiltration, runoff, and groundwater flow.
• Describe how watershed characteristics, porosity, and permeability influence water movement and storage.
• Analyze human modifications such as engineered and land-use changes that affect water timing and distribution.+ Show more

Learning Objectives

• Understand the hierarchical levels of biological organization from molecules to entire organisms.
• Recognize emergent properties at each level of biological complexity.
• Explain how components at lower levels assemble into larger structures that sustain life.+ Show more

Learning Objectives

• Explain how feedback loops, redundancy, and cross-regulation help maintain homeostasis in complex body systems.
• Describe how neural, hormonal, and local signals coordinate respiratory, cardiovascular, and metabolic responses during exercise.
• Analyze how a disruption in one component can cascade to affect whole-organism outcomes.

Learning Objectives

• Explain how changing magnetic flux induces an electromotive force in conductors.
• Describe the relationship between flux change and induced voltage direction and frequency.
• Connect principles of electromagnetic induction to real-world technologies like transformers and generators.+ Show more

Learning Objectives

• Explain the difference between design criteria and constraints in engineering solutions
• Identify how measurable requirements and constraints guide feasible design choices
• Use models and evidence to connect design features to expected performance+ Show more

Learning Objectives

• Explain how net force determines an object's acceleration and how direction matters
• Use Newton’s second law ideas qualitatively to predict how changing mass affects acceleration
• Interpret real-world motion (e.g., pushing a cart) as the result of combined forces