Grade 9 Science Worksheets
6,485 worksheets
Grade 9 Science | Phylogenetic Trees Worksheet (Answer Key) – TEKS Aligned
Learning Objectives
- Understand the concept of phylogenetic trees and their purpose in illustrating evolutionary relationships.
- Interpret different types of phylogenetic trees, including rooted and unrooted trees.
- Identify monophyletic, paraphyletic, and polyphyletic groups within trees.
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Grade 9 Science | Understanding Genetic Drift Worksheet (Answer Key) (PDF)
Learning Objectives
- Explain what genetic drift is and how it affects small populations
- Identify events that cause genetic drift, such as bottlenecks and founder effects
- Analyze how chance and random events influence genetic diversity and evolution
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Grade 9 Science Worksheet – Physical Properties (Ontario, Science) PDF
Learning Objectives
- Define physical properties as observable or measurable characteristics that do not change chemical identity.
- Identify examples of physical properties such as density, melting point, boiling point, colour, hardness, and conductivity.
- Explain how physical properties are used to classify and separate materials.
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Grade 9 Science | Mass Measurement Worksheet (PDF) – BC Standards & Practice
Learning Objectives
- Explain how measured mass changes during chemical reactions reflect the conservation of atoms within system boundaries.
- Identify causes of apparent mass loss in open systems involving gaseous products.
- Describe methods to account for all phases and containment to verify mass conservation.
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Grade 9 Science | Integrated Physiology Worksheet (Answer Key) - NGSS Aligned
Learning Objectives
- Understand how molecular and cellular interactions influence organ system function.
- Link genetic variations to physiological responses and clinical outcomes.
- Interpret biochemical, histological, and organ performance data related to organism health.
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Grade 9 Science | Eclipses Explained Worksheet (Answer Key) – BC Standards
Learning Objectives
- Understand the causes and types of lunar and solar eclipses.
- Identify the alignments needed for different eclipse events.
- Learn how orbital inclination affects eclipse frequency and visibility.
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Grade 9 Science – Phylogenetic Trees Worksheet (Answer Key) | NGSS Standards
Learning Objectives
- Understand the construction of phylogenetic trees based on morphological and molecular data.
- Interpret branching diagrams to infer evolutionary relationships among species.
- Explain cladistic principles such as shared derived characters.
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Grade 9 Science | Fossil Records Worksheet (Answer Key) – TEKS Alignment
Learning Objectives
- Understand how fossil records provide evidence for past life and evolution.
- Identify different types of fossils and methods used to date them.
- Explain the significance of transitional fossils and stratigraphy in reconstructing evolutionary history.
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Grade 9 Science | Cellular Energy Worksheet (Ontario) (PDF)
Learning Objectives
- Describe the main pathways of cellular energy metabolism, including glycolysis, the citric acid cycle, and oxidative phosphorylation.
- Explain how mitochondrial structure supports ATP production and energy conversion.
- Differentiate between aerobic and anaerobic energy pathways and their tissue-specific applications.
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Grade 9 Science | Cell Components Worksheet (Ontario Standard) (PDF)
Learning Objectives
- Identify major organelles of eukaryotic cells and their functions.
- Explain how structural features like membrane folding and compartmentalization influence cell activity.
- Relate the features of cell components to their specific roles in metabolism and exchange processes.
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Grade 9 Science – Digestive Absorption Worksheet (Ontario) (PDF)
Learning Objectives
- Describe the mechanical and chemical processes involved in digestion and nutrient absorption.
- Explain how villi and microvilli increase surface area for absorption across the intestinal epithelium.
- Identify the roles of enzymes, transport mechanisms, bile, and micelles in nutrient uptake.
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Grade 9 Science | Human Impacts Worksheet (PDF) – TEKS-Aligned Science 1
Learning Objectives
- Identify various human activities that affect biodiversity and ecosystems.
- Understand how habitat fragmentation, pollution, and resource extraction alter ecosystem services.
- Evaluate the effects of invasive species and greenhouse gases on species diversity and ecosystem functioning.
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Grade 9 Science – Biotech Applications Worksheet (Worksheet + Answer Key) – TEKS Aligned
Learning Objectives
- Identify common molecular techniques used in biotechnology applications.
- Explain how techniques like PCR, gel electrophoresis, DNA sequencing, and CRISPR are used in research and medicine.
- Describe various applications of biotechnology in diagnostics, gene therapy, and agriculture.
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Grade 9 Science | Collision Safety Concepts Worksheet (NGSS) – PDF
Learning Objectives
- Understand how impulse and force-time tradeoffs reduce peak impact forces.
- Analyze force-time graphs to evaluate energy dissipation strategies.
- Identify design features like crumple zones, airbags, and padding that mitigate collisions.
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Grade 9 Science | Trophic Structure Worksheet (Answer Key) – TEKS Aligned
Learning Objectives
- Understand the components and organization of trophic levels in ecosystems.
- Describe how energy flows through food chains and webs.
- Explain the concepts of trophic efficiency and trophic cascades.
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Grade 9 Science | Community Interactions Worksheet (Worksheet + Answer Key) – TEKS Aligned
Learning Objectives
- Describe different types of species interactions that occur within communities.
- Identify the roles of keystone species and ecosystem engineers.
- Analyze how species interactions influence community structure and ecosystem stability.
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Grade 9 Science – Biogeochemical Cycles Worksheet (Answer Key) | TEKS Standard
Learning Objectives
- Explain the movement of elements such as carbon, nitrogen, and phosphorus among Earth's reservoirs.
- Identify key processes like photosynthesis, decomposition, nitrogen fixation, and weathering in biogeochemical cycles.
- Analyze how fluxes and reservoir sizes influence ecosystem responses to environmental disturbances.
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Grade 9 Science | Immune Barriers Worksheet (Ontario Standard) (PDF)
Learning Objectives
- Describe the different physical barriers, such as skin and mucosa, that defend against pathogens.
- Explain the role of cellular mediators like macrophages and lymphocytes in immune defense.
- Understand the mechanisms of inflammation, memory formation, and immune response modulation by environmental factors.
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Grade 9 Science – Gene Expression Worksheet (Worksheet + Answer Key) | TEKS Aligned
Learning Objectives
- Describe the process of gene transcription and translation.
- Identify the roles of DNA, mRNA, tRNA, and ribosomes in gene expression.
- Explain how gene regulation influences gene expression at different stages.
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Grade 9 Science | System Interactions Worksheet (Ontario – PDF)
Learning Objectives
- Analyze the interactions among different body systems that maintain homeostasis.
- Describe feedback mechanisms, set points, and coordination between endocrine and nervous responses.
- Understand how systems like circulation, respiration, renal, and neural control work together to sustain internal stability.
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Grade 9 Science | Evidence Chains Worksheet (AP Standards + Answer Key) (PDF)
Learning Objectives
- Understand the structure of evidence-based reasoning linking observations, analyses, and claims.
- Identify standards for sufficiency, consistency, and handling competing explanations.
- Utilize multiple representations such as graphs, summaries, and diagrams to support inferences.
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Grade 9 Science | Momentum Conservation Worksheet (Answer Key) | NGSS Aligned
Learning Objectives
- Understand the principle of conservation of linear momentum in isolated systems.
- Differentiate between elastic and inelastic collisions using quantitative analysis.
- Calculate total momentum before and after interactions in various scenarios.
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Grade 9 Science | DNA Replication Worksheet (Answer Key) – TEKS-Aligned
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.
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Grade 9 Science – Free-Body Diagrams Worksheet (Ontario, PDF)
Learning Objectives
- Understand the conventions for representing forces in free-body diagrams.
- Identify and label common forces such as weight, normal force, tension, and friction.
- Apply free-body diagrams to analyze situations involving equilibrium and acceleration.
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Grade 9 Science | Model-Data Fit AP Practice Worksheet (PDF)
Learning Objectives
- Understand methods for assessing the fit between models and empirical data.
- Interpret residual plots and goodness-of-fit measures to evaluate models.
- Identify patterns indicating issues like heteroscedasticity or missing variables.
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Grade 9 Science | Cosmic Timescales Worksheet (NGSS Aligned + PDF)
Learning Objectives
- Understand key observational evidence used to determine the age and expansion of the universe.
- Explain the significance of redshift surveys, Hubble's law, and cosmic microwave background measurements.
- Analyze how primordial element abundances help constrain cosmic history.
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Grade 9 Science – Energy Conservation Worksheet (Ontario) – PDF
Learning Objectives
- Understand the principles of mechanical energy conservation in ideal systems.
- Identify conditions under which total mechanical energy remains constant.
- Explore the role of non-conservative work, such as friction, in energy dissipation.
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Grade 9 Science | Enzyme Basics Worksheet (Answer Key) – TEKS Standards
Learning Objectives
- Explain how enzymes act as biological catalysts and lower activation energy in metabolic reactions.
- Understand the role of enzyme structure and active sites in substrate specificity and catalysis.
- Describe the functions of cofactors and coenzymes in enzyme activity.
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Grade 9 Science | Graphical Literacy Worksheet (AP Standards) – PDF
Learning Objectives
- Understand how to interpret different types of graphs such as scatterplots, histograms, line graphs, and residual displays.
- Learn how to select an appropriate graph type based on data patterns and relationships.
- Identify the importance of axis scaling, labeling, binning choices, and visual patterns in data analysis.
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Grade 9 Science | Force Laws Worksheet (NGSS Aligned + PDF) – Science
Learning Objectives
- Understand the inverse-square relationship in gravitational and electrostatic forces.
- Apply quantitative formulas to calculate the magnitude and direction of forces between objects.
- Use vector analysis to determine net forces in multi-body systems.
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Grade 9 Science | Human Influence Worksheet + Answer Key | NGSS Standards
Learning Objectives
- Analyze the effects of human activities such as fossil fuel combustion, deforestation, and urbanization on climate variables.
- Interpret data trends from indicators like the Keeling Curve and vegetation loss satellites.
- Evaluate evidence linking emissions to regional and global ecosystem changes.
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Grade 9 Science | Planetary Origins Worksheet (NGSS) – Science PDF
Learning Objectives
- Explain the process of solar system formation from a protoplanetary disk.
- Identify key evidence supporting planetary formation theories, such as meteorite composition and radiometric dating.
- Describe the differences between inner rocky planets and outer gas giants.
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Grade 9 Science | Resource Choices Worksheet – NGSS Aligned (PDF)
Learning Objectives
- Compare energy and mineral resource options based on environmental impacts and life-cycle costs.
- Evaluate the trade-offs involved in resource extraction methods and use.
- Analyze factors such as water use, land disturbance, emissions, and sustainability in resource decision-making.
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Grade 9 Science | Ecosystem Cycling Worksheet (AP Standards) PDF
Learning Objectives
- Describe interactions among organisms and abiotic components that drive material cycling and energy flow in ecosystems.
- Explain the processes of carbon and nitrogen cycles, trophic transfer, and stoichiometric constraints.
- Analyze the impacts of perturbations such as nutrient enrichment, habitat alteration, and invasive species on ecosystem function.
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Grade 9 Science | Center Stability Worksheet (Answer Key) – NGSS Aligned
Learning Objectives
- Understand how to calculate the center of mass for composite systems.
- Apply moments and torque conditions to analyze static equilibrium.
- Assess the stability of objects based on their mass distribution and support base.
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Grade 9 Science – Energy Conservation Worksheet (NGSS-Aligned) (PDF)
Learning Objectives
- Understand the concept of energy conservation within different systems.
- Learn to represent energy transfers using diagrams and mathematical models.
- Identify and trace energy reservoirs during physical and chemical processes.
$3.00
Grade 9 Science | Orbital Motion Worksheet with Answer Key (NGSS-Aligned PDF)
Learning Objectives
- Understand the principles of gravitational interactions governing planetary and satellite orbits.
- Explain Kepler's laws and Newton's law of universal gravitation.
- Analyze the relationships between orbital period, semi-major axis, and escape velocity.
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Grade 9 Science | Tectonic Plates Worksheet (Answer Key) – BC Standards
Learning Objectives
- Understand the composition and movement of Earth's tectonic plates.
- Identify the forces responsible for plate movements such as mantle convection, slab pull, and ridge push.
- Explain how plate interactions cause earthquakes, volcanoes, and mountain formations.
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Grade 9 Science | Endocrine Feedback Worksheet (Ontario) – Science (PDF)
Learning Objectives
- Describe how hormones are synthesized, transported, and act on cells through receptor-mediated actions.
- Explain the roles of negative and positive feedback loops in hormonal regulation.
- Analyze mechanisms of glucose homeostasis involving insulin and glucagon.
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Grade 9 Science – Simulated Predictions Worksheet + Answer Key | AP Standard
Learning Objectives
- Explain the role of simple computational simulations and numerical models in generating predictions.
- Identify how parameters influence simulation outcomes and the importance of scenario comparison.
- Describe how ensembles and visualizations represent forecast uncertainty.
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Grade 9 Science | Power Analysis Worksheet (Answer Key) aligned with NGSS
Learning Objectives
- Understand the concepts of power, energy, and efficiency in technological systems.
- Calculate energy demand over time and assess system performance related to power output.
- Analyze energy loss and conversion efficiency in electrical systems.
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Grade 9 Science | Electromagnetic Radiation Worksheet (Answer Key)– NGSS Aligned
Learning Objectives
- Understand the relationship between photon energy, frequency, and wavelength across the electromagnetic spectrum.
- Explain characteristic phenomena such as atomic emission and absorption lines.
- Apply Planck’s relation to compare the energy of different electromagnetic signals.
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Grade 9 Science | Integrated Metabolism Worksheet – TEKS Standards (PDF)
Learning Objectives
- Understand how catabolic and anabolic pathways are interconnected
- Explain how hormonal signals and nutrient availability influence metabolism
- Describe rapid and long-term metabolic regulation mechanisms
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Grade 9 Science | Biotech Ethics Worksheet (Worksheet + Answer Key) – TEKS Aligned
Learning Objectives
- Understand key ethical considerations in biotechnology, including societal impacts and ecological consequences.
- Identify and evaluate ethical issues related to genetic manipulation, privacy, and regulation.
- Analyze case studies of biotech applications for ethical implications.
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Grade 9 Science | Speciation Introduction Worksheet (Answer Key) – TEKS Aligned
Learning Objectives
- Understand the process of speciation and how it contributes to biodiversity.
- Identify different reproductive barriers and mechanisms involved in speciation.
- Differentiate between allopatric and sympatric speciation and their causes.
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Grade 9 Science | Organelles Function & Cell Biology Worksheet (AP & PDF)
Learning Objectives
- Identify the major organelles and understand their specific functions in the cell.
- Explain how organelles like mitochondria and chloroplasts contribute to energy production.
- Compare the structures of various organelles and relate them to their roles.
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Grade 9 Science | Respiratory Pathways Worksheet (AP Standard) – PDF
Learning Objectives
- Describe the main pathways involved in cellular respiration, including glycolysis, the citric acid cycle, and electron transport chain.
- Explain how substrate-level and oxidative phosphorylation contribute to ATP production.
- Compare aerobic and anaerobic respiration in terms of ATP yield and metabolic outcomes.
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Grade 9 Science – Bond Types Worksheet (Worksheet + Answer Key) | BC Standards
Learning Objectives
- Identify and describe different types of chemical bonds: ionic, covalent, and metallic.
- Explain how electron arrangements influence material properties.
- Recognize bond types from characteristic properties and behaviors.
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About Grade 9 Science Worksheets
Find Science worksheets built for Grade 9. All 6,485 cover core skills, practice, and review, each an instant PDF download.
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