Grade 9 Science Worksheets

Learning Objectives

• Understand the geometric relationship between the Sun, Earth, and Moon that causes lunar phases.
• Describe the sequence of lunar phases and how they relate to Moon's position in orbit.
• Predict lunar phases based on the cycle and explain their importance in calendars and observations.+ Show more

Learning Objectives

• Explain how adaptive radiation leads to rapid diversification from a single ancestral lineage into multiple species
• Describe the roles of ecological niches, key innovations, and varying selective pressures in driving trait and behavior differences
• Interpret how models help scientists study rates of lineage splitting and trait evolution over time and space

Learning Objectives

• Understand how environmental exposures affect cellular processes and long-term health.
• Identify different pollutants and hazards in air, water, and workplaces.
• Analyze how dose-response relationships influence organ system performance.+ Show more

Learning Objectives

• Define chemical properties and identify their indicators.
• Recognize examples of chemical reactions such as rusting and combustion.
• Differentiate between physical and chemical changes based on reaction outcomes.+ Show more

Learning Objectives

• Explain how nitrogen and phosphorus move through ecosystems via biological, chemical, and physical processes.
• Describe key steps in the nitrogen cycle (fixation, assimilation, mineralization, denitrification) and how they affect primary productivity.
• Analyze how human nutrient inputs can disrupt nutrient cycling and lead to eutrophication and hypoxia in aquatic systems.

Learning Objectives

• Explain how waves can transfer energy without transporting matter overall
• Relate frequency, wavelength, and amplitude to observable wave behavior
• Use wave property descriptions to predict how a wave would change its energy and appearance+ Show more

Learning Objectives

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

Learning Objectives

• Explain how neurons generate action potentials and how synapses transmit signals to control body functions.
• Describe how neural circuits and central integration organize information for coordinated responses.
• Relate myelination and synaptic architecture to conduction velocity and processing capacity.+ Show more

Learning Objectives

• Describe how chemical formulas represent elements and fixed ratios in compounds
• Explain how ionic and covalent bonding influence observable properties of substances
• Apply the law of definite composition to distinguish compounds from mixtures+ Show more

Learning Objectives

• Explain how Moon phases result from the Moon’s changing position relative to Earth and the Sun.
• Describe the conditions required for solar and lunar eclipses and why eclipses do not happen every month.
• Use viewing geometry concepts to interpret what is happening during phases and eclipses.

Learning Objectives

• Use constant-acceleration (kinematics) equations to relate displacement, velocity, acceleration, and time.
• Apply a consistent sign convention and unit analysis when solving physics motion problems.
• Solve numerical problems by substituting known values into standard kinematics equations and checking whether results are physically reasonable.+ Show more

Learning Objectives

• Understand how fossil records provide evidence for evolutionary history.
• Identify the methods used to date and interpret fossils.
• Explain patterns observed in the fossil record related to trait appearance and extinction.+ Show more

Learning Objectives

• Explain the major mechanisms of plate tectonics and how lithospheric plate motions occur
• Describe what happens at divergent, convergent, and transform plate boundaries
• Use evidence such as earthquakes and volcanic arcs to support the idea of plate interactions+ Show more

Learning Objectives

• Explain how genetic technologies can create both ecological and economic risks and benefits
• Describe how scientists conduct risk assessment and use mitigation strategies and long-term monitoring
• Evaluate uncertainty and long-term trade-offs when adopting novel genetic approaches+ Show more

Learning Objectives

• Identify observable evidence that indicates a chemical change has occurred.
• Explain how evidence such as gas, precipitate, colour shift, and temperature change supports the formation of new substances.
• Distinguish chemical change from physical change using criteria based on ordinary conditions.

Learning Objectives

• Understand key ethical considerations in biotechnology.
• Identify societal implications of genetic manipulation.
• Evaluate risks versus benefits in biotechnological applications.+ Show more

Learning Objectives

• Explain how balancing chemical equations enforces conservation of atoms and mass.
• Use coefficients to ensure the number of each type of atom matches on both sides of a reaction.
• Interpret balanced equations to predict relative reactant and product amounts.

Learning Objectives

• Understand the concept of centripetal force and its role in circular motion.
• Describe how speed and radius affect the acceleration in circular motion.
• Analyze the forces involved such as tension, friction, and normal force in curved trajectories.+ Show more

Learning Objectives

• Explain conservation of matter and how it applies to chemical reactions and balanced equations
• Use coefficients to match the number of atoms (or representative particles) of each element on both sides of an equation
• Identify and correct errors in unbalanced chemical equations using quantitative reasoning+ Show more

Learning Objectives

• Differentiate homogeneous and heterogeneous mixtures using examples and particle-level reasoning
• Explain how physical properties such as particle size, solubility, boiling point, and density can separate mixtures
• Describe separation methods (filtration, distillation, magnetic separation, and decanting) in terms of what property they use

Learning Objectives

• Understand the geometric conditions leading to solar and lunar eclipses.
• Identify the correct sequence of alignment among Sun, Earth, and Moon during eclipses.
• Describe how orbital inclinations affect eclipse frequency and paths of totality.+ Show more

Learning Objectives

• Understand the process of seafloor spreading and its role in plate tectonics.
• Identify evidence that supports models of seafloor spreading, such as magnetic striping and age progression.
• Explain how oceanic crust is created and recycled at mid-ocean ridges and subduction zones.+ Show more

Learning Objectives

• Compare bacterial and archaeal cell organization with eukaryotic cells, focusing on differences in size, compartmentalization, and genetic arrangement.
• Describe features of prokaryotic cells such as the lack of membrane-bound organelles, circular DNA, and cell wall composition.
• Explain the structural and functional differences between prokaryotes and eukaryotes, including cellular components like ribosomes, plasmids, and membrane systems.+ Show more

Learning Objectives

• Identify a frame of reference used to describe motion.
• Interpret velocity direction as measured in a chosen frame.
• Explain how changes in frame affect calculated displacement and velocity but not the physical facts of motion.

Learning Objectives

• Understand the Earth's magnetic field and its influence on navigation and technology.
• Describe regional variation in magnetic declination and its effects on mapping and surveying.
• Explain the concepts of magnetic origin, dip, and regional variation in planetary magnetism.+ Show more

Learning Objectives

• Explain how multiple organ systems work together to maintain stable internal conditions.
• Describe how circulatory, respiratory, digestive, renal, nervous, and endocrine processes support homeostasis.
• Use cause-and-effect reasoning to connect system changes to internal balance.

Learning Objectives

• Explain how ideal mechanical advantage relates force to displacement
• Distinguish ideal mechanical advantage from actual mechanical advantage
• Compare force and speed changes in compound machine systems+ Show more

Learning Objectives

• Interpret coefficient ratios in balanced chemical equations to relate reactant and product masses
• Use conservation of mass to reason about how much mass appears in products during real chemical processes
• Translate between symbolic chemical representations and real-world mass accounting scenarios

Learning Objectives

• Explain how greenhouse gases alter Earth’s energy balance
• Describe how albedo changes can amplify warming
• Compare cooling and warming effects associated with aerosols+ Show more

Learning Objectives

• Identify how voltage and current divide in mixed series-parallel circuits
• Determine equivalent resistance of common series and parallel combinations
• Trace current paths to predict how changing a branch affects the overall circuit

Learning Objectives

• Define pure substances and mixtures using composition criteria
• Distinguish elements from compounds using symbols and formulas
• Classify materials as elements, compounds, or mixtures+ Show more

Learning Objectives

• Identify major organelles of eukaryotic cells
• Understand the functions of different cell structures
• Relate cell structure features to their specific functions+ Show more

Learning Objectives

• Understand the concept of chemical change as the formation of new substances with different properties.
• Identify common indicators of chemical change such as temperature change, gas production, precipitate formation, and color change.
• Distinguish between observable chemical evidence and physical rearrangement of matter at microscopic levels.+ Show more

Learning Objectives

• Understand how the slope of displacement–time graphs indicates velocity.
• Interpret the area under velocity–time graphs to determine displacement.
• Identify non-uniform acceleration through curved graphs and discontinuities.+ Show more

Learning Objectives

• Understand how to represent and analyze temporally changing systems using time-series descriptions.
• Identify the role of rates, feedback loops, and equilibrium concepts in empirical data.
• Interpret mathematical forms that capture transient and steady-state behaviors.+ Show more

Learning Objectives

• Define what a free body diagram is and its purpose in physics.
• Identify the forces acting on an object when drawing a free body diagram.
• Understand how to represent forces with vectors in diagrams.+ Show more

Learning Objectives

• Explain how scaling affects relationships between physical quantities when moving between small and large systems.
• Use dimensional similarity and proportional reasoning to predict how a model’s measurements should change with size.
• Interpret data trends while accounting for scale-dependent effects such as nonlinearity and diffusion limits.

Learning Objectives

• Explain what chemical reactions are and how atoms are rearranged to form new substances.
• Identify evidence of chemical reactions, including changes in energy and matter.
• Interpret and balance symbolic chemical equations to connect observations to particle-level changes.+ Show more

Learning Objectives

• Explain reaction balancing using conservation of matter and conservation of atoms.
• Interpret chemical equation coefficients as particle/atom counts of reactants and products.
• Balance simple chemical equations by matching the number of atoms of each element on both sides.

Learning Objectives

• Explain the process of seafloor spreading at mid-ocean ridges.
• Interpret magnetic striping patterns recorded in basaltic rocks.
• Describe how oceanic crust ages and the cycle of ocean basin creation and consumption.+ Show more

Learning Objectives

• Explain how balanced and unbalanced forces affect net force and changes in velocity.
• Predict the direction of acceleration using the direction of the net force.
• Describe how velocity changes can involve speed changes, direction changes, or both.

Learning Objectives

• Understand and define key measures of variability such as range, variance, and interquartile range.
• Interpret how different variability measures inform confidence in statistical estimates.
• Relate variability to sampling design, heterogeneity, and theoretical models.+ Show more

Learning Objectives

• Understand the definition of power as the rate of energy transfer or work per unit time.
• Learn how to measure average and instantaneous power in mechanical contexts.
• Understand what mechanical efficiency is and how it reflects useful energy output relative to input.+ Show more

Learning Objectives

• Explain how heat transfer happens due to temperature differences between a system and its surroundings.
• Describe how work transfers energy through forces acting over a distance.
• Use energy-transfer language to distinguish what comes from or goes to the surroundings during physical and chemical changes.

Learning Objectives

• Explain how a device can be modeled as a system with inputs, outputs, energy transfers, and material flow
• Identify system boundaries and track how changes in components affect reliability and performance
• Use systems thinking to predict how a mechanical, sensing, or control part influences grip force, accuracy, and failure risk

Learning Objectives

• Evaluate the suitability of electrical device ratings, functions, and environmental factors in different applications.
• Identify appropriate protective measures for electrical systems based on load, climate, and safety standards.
• Match supply characteristics to device requirements for efficient and safe operation.+ Show more

Learning Objectives

• Understand the process of photosynthesis and how light energy is converted into chemical energy in plants.
• Identify the roles of producers, consumers, and decomposers in energy flow.
• Explain how energy transfer occurs through trophic levels and why energy pyramids narrow at higher levels.+ Show more

Learning Objectives

• Explain phase changes using energy transfer and the motion of particles.
• Identify what happens to temperature, particle motion, and potential energy during melting, vaporization, sublimation, and condensation.
• Interpret qualitative heating and cooling curves, including temperature plateaus and latent heat.