Grade 9 Science Worksheets

Learning Objectives

• Explain how enzymes lower activation energy to speed up reactions
• Use key vocabulary (enzyme, substrate, active site, activation energy, catalyst, transition state)
• Describe how enzyme–substrate specificity depends on protein structure+ Show more

Learning Objectives

• Understand the relationships among Earth's, Sun's, and Moon's orbits that produce lunar phases, seasons, and tides.
• Explain how Earth's axial tilt and orbital eccentricity influence climate and seasonal variations.
• Describe the gravitational interactions between Earth, Moon, and Sun that generate tidal patterns.+ Show more

Learning Objectives

• Understand what coefficients in balanced chemical equations represent
• Interpret ratios of coefficients to determine relative amounts of reactants and products
• Relate symbolic coefficients to real-world mass relationships in chemical reactions+ Show more

Learning Objectives

• Identify and describe major carbon reservoirs on Earth
• Understand the fluxes that transfer carbon among different reservoirs
• Explain the role of biological processes like photosynthesis and respiration+ Show more

Learning Objectives

• Explain how transcription and translation convert DNA information into a functional protein.
• Identify the roles of key molecules involved in gene expression (RNA polymerase, mRNA, ribosome, tRNA).
• Describe how regulation at transcriptional and translational stages affects when and how much a gene is expressed.+ Show more

Learning Objectives

• Use kinematic relations to describe motion with acceleration along a straight line
• Apply net force reasoning (force balances) to predict changes in velocity and stopping behavior
• Combine energy considerations with friction and incline/grade effects to estimate stopping distance+ Show more

Learning Objectives

• Describe chemical properties as tendencies to undergo specific chemical changes.
• Identify evidence of chemical change (gas evolution, precipitate formation, permanent color change, and energy exchange).
• Differentiate chemical changes from physical changes using observation-based reasoning.+ Show more

Learning Objectives

• Understand the basic concepts of gravity
• Learn how gravity influences the motion of planets and moons
• Recognize the patterns of orbit in the solar system+ Show more

Learning Objectives

• Identify the main idea and key details about human impacts on biodiversity and ecosystem services.
• Explain how human actions can change habitats and species interactions.
• Describe how changes in biodiversity can affect ecosystem services such as pollination and water purification.

Learning Objectives

• Understand and describe Newton's three laws of motion.
• Connect observable motions, such as a puck sliding or bouncing ball, to Newtonian principles.
• Explain how forces and interactions predict motion outcomes.+ Show more

Learning Objectives

• Explain how predation, competition, and mutualism are represented in ecosystem interaction networks.
• Analyze how changes in one population can cascade through food and resource relationships.
• Interpret how abiotic factors like water, temperature, and nutrients affect survival and growth.

Learning Objectives

• Explain how exchange rates between reservoirs change carbon in the atmosphere over time.
• Distinguish short-term cycling from slow geologic movement of carbon through rocks.
• Describe how temperature and precipitation control when water stored in ice or groundwater returns to the cycle.+ Show more

Learning Objectives

• Explain how climate variability is identified by comparing many weather measurements over time
• Differentiate climate variability from persistent climate change
• Interpret how ocean-atmosphere shifts can change regional weather patterns+ Show more

Learning Objectives

• Explain how cell membranes regulate transport of nutrients and wastes
• Describe how cells use energy to power chemical reactions needed for growth
• Use models to predict how cells maintain internal balance and respond to environmental changes+ Show more

Learning Objectives

• Describe the structure of DNA as a double helix and explain how base pairing stabilizes it
• Identify how the sequence of DNA bases relates to the information carried by genes
• Explain why DNA structure affects how genetic information is passed on

Learning Objectives

• Define observable properties and explain why they are useful for identifying materials.
• Distinguish between physical properties and ways we measure or describe them.
• Use examples of colour, hardness, conductivity, density, and solubility to classify substances.

Learning Objectives

• Identify observable evidence of chemical change from acid deposition on limestone
• Explain particulate and atomic ideas for how acids affect carbonate minerals
• Use mass conservation ideas to describe measurable mass changes across a system boundary

Learning Objectives

• Define power as the rate of energy transfer.
• Explain how efficiency compares useful output energy to input energy.
• Use input power, output power, and losses to interpret real-world performance.

Learning Objectives

• Explain how friction acts as a resistance force that opposes motion.
• Use vocabulary from a science text to interpret cause-and-effect relationships.
• Distinguish factors that increase or decrease friction in everyday situations.

Learning Objectives

• Describe matter using a particulate model with discrete particles
• Explain how particle motion and spacing relate to diffusion
• Use kinetic energy and collisions to justify differences between solids, liquids, and gases+ Show more

Learning Objectives

• Explain how slope on a displacement–time graph relates to velocity.
• Explain how slope on a velocity–time graph relates to acceleration.
• Use area under a velocity–time graph to determine displacement.+ Show more

Learning Objectives

• Identify major sources of genetic variation in populations, including mutation, recombination, gene flow, and chromosomal rearrangements.
• Explain how mutation rate and the type of mutation can increase or decrease genetic diversity.
• Describe how gene flow and hybridization change gene pools over time in connected populations.+ Show more

Learning Objectives

• Describe the three main types of plate boundaries: divergent, convergent, and transform.
• Explain the geological processes associated with each boundary type.
• Identify landforms and landmass features resulting from different boundary interactions.+ Show more

Learning Objectives

• Explain how microscope images function as visual models that support interpreting cell structures.
• Use magnification, scale bars, and diagrams to reason about size and spatial relationships in cells.
• Describe how schematic and physical models can generate and test hypotheses about cellular processes.

Learning Objectives

• Explain how glycolysis and the citric acid cycle generate ATP precursors and electron carriers (NADH, FADH2).
• Describe how mitochondrial structure (inner membrane folds and matrix enzymes) supports proton gradient formation and ATP synthase activity.
• Compare aerobic and anaerobic pathways, including why ATP yield differs in different tissues (e.g., skeletal muscle during exertion).+ Show more

Learning Objectives

• Understand the basic structure of DNA and how it forms the double helix
• Identify the organization of chromosomes within the cell nucleus
• Explain how DNA is packaged into chromosomes and how this relates to heredity+ Show more

Learning Objectives

• Use balanced chemical equations and molar mass to convert between mass, moles, and particle counts.
• Identify the limiting reactant and determine expected product amounts from stoichiometric ratios.
• Apply conservation of mass to check that total reactant mass equals total product mass in ideal conditions.

Learning Objectives

• Understand how collision frequency, activation energy, and reaction pathways influence reaction rate.
• Explain how temperature, concentration, and catalysts modify energy distributions and reaction speeds.
• Describe rate laws and reaction order with quantitative examples such as bromine-iodide kinetics.+ Show more

Learning Objectives

• Explain how storage reservoirs and time scales affect Earth-system changes in carbon and water.
• Describe how exchange rates between reservoirs (atmosphere, oceans, living systems, rocks) influence carbon levels.
• Analyze how energy flow can drive evaporation, winds, temperature, and feedbacks that reinforce or dampen change.

Learning Objectives

• Explain how interval estimates, likelihood statements, and effect sizes communicate quantitative uncertainty in scientific claims.
• Interpret graphs and visualizations that show variability, and connect them to the uncertainty in the underlying data.
• Report numerical results with appropriate limits of extrapolation and clear assumptions.+ Show more

Learning Objectives

• Explain how greenhouse gas forcing, albedo changes, aerosol effects, and land-use feedbacks influence Earth’s energy balance
• Use basic radiative transfer and energy-budget ideas to describe the climate system’s warming and equilibrium behavior
• Connect human emissions to carbon-cycle perturbations and projected climate responses+ Show more

Learning Objectives

• Explain how new oceanic crust forms at mid-ocean ridges during seafloor spreading.
• Interpret magnetic striping patterns and relate them to magnetic reversals and ridge symmetry.
• Describe how seafloor age and bathymetry help reconstruct ocean basin formation and plate motion.

Learning Objectives

• Explain how energy flows one direction through food chains and why some energy is lost at each trophic level
• Describe how matter cycles through organisms and the environment through processes such as photosynthesis and cellular respiration
• Interpret models and evidence (trophic levels, biomass changes, and atom rearrangement) to compare energy transfer and matter cycling

Learning Objectives

• Differentiate elements, compounds, and mixtures using macroscopic and compositional criteria
• Identify homogeneous versus heterogeneous mixtures based on appearance and uniformity
• Use chemical symbols and formulas to represent elements and compounds

Learning Objectives

• Understand the concept of longer-term climate patterns and their significance.
• Interpret weather-related data such as temperature, precipitation, and wind to identify trends.
• Explain how phenomena like El Niño influence regional weather and climate variability.+ Show more

Learning Objectives

• Use constant-acceleration (kinematics) equations to relate displacement, time, initial velocity, final velocity, and acceleration
• Apply a consistent sign convention and correct SI units when solving motion problems
• Solve real-world applications (braking, skiing, free fall) and interpret results using substitution and algebra

Learning Objectives

• Identify the different types of metabolic pathways including catabolic and anabolic pathways.
• Describe the roles of enzymes and energy transfer in metabolic processes.
• Explain the regulation mechanisms that control pathway activity within cells.

Learning Objectives

• Identify the key components involved in photosynthesis
• Describe the process by which plants convert sunlight into chemical energy
• Recognize the inputs and outputs of photosynthesis+ Show more

Learning Objectives

• Understand the process of fertilization in animals
• Differentiate between internal and external fertilization
• Describe embryonic development stages+ Show more

Learning Objectives

• Explain how organelles work together as integrated systems to support metabolism and cell maintenance.
• Describe how transport vesicles and the cytoskeleton coordinate movement of molecules and organelles within cells.
• Connect spatial organization of organelles to biochemical pathway function and cell responses.

Learning Objectives

• Understand the different mechanisms of molecular movement across cell membranes.
• Distinguish between passive and active transport processes.
• Explain the roles of specific transport proteins such as channels, carriers, and pumps.+ Show more

Learning Objectives

• Understand key concepts related to Science
• Apply knowledge through practice questions
• Demonstrate comprehension of the material

Learning Objectives

• Understand what phylogenetic trees depict about evolutionary relationships.
• Identify parts of a phylogenetic tree, including branches, nodes, and clades.
• Differentiate between rooted and unrooted trees.+ Show more

Learning Objectives

• Understand the Law of Conservation of Mass in chemical reactions
• Learn how to balance chemical equations
• Identify elements and formulas in chemical reactions+ Show more

Learning Objectives

• Explain how an iteration loop uses test evidence to improve a design over multiple cycles
• Describe how changing variables (dimensions, materials, alignment, interactions) can affect outcomes
• Justify why reliability and safety margins often grow after repeated testing

Learning Objectives

• Understand the concept of power as the rate of energy transfer.
• Describe the difference between power and energy.
• Explore real-world examples of power in engineering applications.+ Show more

Learning Objectives

• Explain how mechanical energy changes between gravitational potential energy and kinetic energy.
• Use the idea of energy conservation with non-conservative losses (like friction) to predict motion limits.
• Describe energy transfers during work interactions and how dissipation affects achievable speeds and heights.

Learning Objectives

• Define genetic drift and explain its role in evolution.
• Identify the effects of genetic drift in small populations.
• Differentiate between genetic drift and natural selection.+ Show more