Grade 9 Science Worksheets

Learning Objectives

• Describe the structure of DNA and its double-helix formation.
• Explain how chromosomes organize genetic information within cells.
• Distinguish between nuclear and organelle genomes and their roles.+ Show more

Learning Objectives

• Explain the principles of allele frequency and Hardy-Weinberg equilibrium assumptions.
• Describe genetic drift, bottlenecks, and founder effects in small or isolated populations.
• Analyze how gene flow, selection coefficients, and stochastic processes influence evolutionary outcomes.+ Show more

Learning Objectives

• Explain Mendelian inheritance patterns including dominant and recessive alleles.
• Distinguish between genotype and phenotype in genetic traits.
• Apply Punnett square logic to predict trait segregation ratios.+ Show more

Learning Objectives

• Understand how human activities influence water, soil, mineral, and energy resources using quantitative indicators.
• Interpret resource trend data in the context of natural variability and thresholds to assess sustainability.
• Analyze effects such as subsidence, soil erosion, and sediment changes resulting from resource extraction.+ Show more

Learning Objectives

• Explain the sequence and roles of catabolic and anabolic pathways in cellular metabolism.
• Describe how enzyme regulation controls pathway activity in response to cellular energy demands.
• Identify the mechanisms of feedback inhibition, compartmentalization, and substrate availability in metabolic regulation.+ Show more

Learning Objectives

• Understand the origin and nature of Earth's magnetic field.
• Learn how magnetic declination varies regionally and affects navigation.
• Connect planetary-scale magnetism to local technological applications and instrument calibration.+ Show more

Learning Objectives

• Identify common sources of systematic and random errors in scientific experiments.
• Understand methods for detecting and quantifying errors such as bias, confounding, and model mis-specification.
• Explain how error contributes to overall uncertainty and how to interpret robust conclusions based on error analysis.

Learning Objectives

• Model how seafloor spreading and subduction zones drive changes in Earth’s surface and seafloor features.
• Explain how volcanic arc systems and mountain belt uplift result from crustal deformation and faulting.
• Use evidence such as seafloor magnetic anomaly patterns and geologic cross-sections to support plate tectonics.

Learning Objectives

• Explain how work depends on force, displacement, and the angle between them.
• Use the work–energy theorem to predict how net work changes kinetic energy.
• Determine whether an object speeds up or slows down based on the direction of net force relative to motion.

Learning Objectives

• Understand the molecular mechanisms of light absorption in photosynthesis.
• Describe the process of energy transfer among pigments during photosynthesis.
• Explain how photosystems convert light energy into chemical energy.+ Show more

Learning Objectives

• Describe the mechanisms behind divergent, convergent, and transform plate boundaries.
• Identify surface features associated with each type of plate boundary.
• Interpret evidence such as seafloor age, paleomagnetic stripes, and seismicity to understand plate movements.+ Show more

Learning Objectives

• Describe the different types of forces including contact and non-contact forces.
• Understand how vector quantities like magnitude and direction combine to influence motion.
• Apply qualitative reasoning to predict the effects of opposing forces on objects.+ Show more

Learning Objectives

• Understand the concepts of power and efficiency in engineering systems.
• Identify practical examples of power transfer and energy conversion.
• Analyze the relationship between input power, output work, and energy losses.+ Show more

Learning Objectives

• Understand how the slope of displacement–time graphs relates to velocity.
• Recognize how the slope of velocity–time graphs indicates acceleration.
• Interpret the area under a velocity–time graph as displacement.+ Show more

Learning Objectives

• Identify variables in constant-acceleration motion equations
• Understand the sign convention for velocity and acceleration
• Apply algebraic formulas to predict displacement and velocity+ Show more

Learning Objectives

• Define relative motion and understand the concept of frames of reference.
• Identify different examples of relative motion in everyday life.
• Describe how velocity depends on the observer's frame of reference.+ Show more

Learning Objectives

• Understand the fundamentals of kinematic descriptions through graphs and equations.
• Apply force balance principles to analyze complex motion scenarios.
• Integrate energy considerations with motion analysis for comprehensive explanations.+ Show more

Learning Objectives

• Define mechanical advantage and explain its importance in machinery.
• Identify different classes of levers and how they relate to mechanical advantage.
• Calculate mechanical advantage ratios for various simple machines.+ Show more

Learning Objectives

• Understand the basics of displacement-time graphs
• Interpret the slope of displacement-time graphs to determine speed
• Recognize different segments indicating uniform and changing motion+ Show more

Learning Objectives

• Understand the concepts of kinetic and potential energy
• Identify examples of energy transfer in real-world scenarios
• Explain how energy conservation applies to different situations+ Show more

Learning Objectives

• Identify the three laws of motion developed by Sir Isaac Newton.
• Explain how forces influence the movement of objects.
• Apply Newtonian principles to real-world situations such as transportation and structural stability.

Learning Objectives

• Describe the parts and operation of a lever.
• Identify different types of simple machines.
• Explain how simple machines reduce effort and change direction.+ Show more

Learning Objectives

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

Learning Objectives

• Understand the concept of friction and how surface texture influences it.
• Identify everyday examples of friction and drag.
• Explain how friction and drag affect the performance of vehicles and objects.+ Show more

Learning Objectives

• Define net force and explain its role in motion.
• Describe how vector addition determines the resultant force.
• Identify factors influencing net force in practical scenarios.+ Show more

Learning Objectives

• Develop testable predictions for electrical circuit investigations.
• Identify variables and hazards in a safe circuit test.
• Interpret electrical measurements while considering uncertainty.+ Show more

Learning Objectives

• Distinguish physical changes from chemical changes using observable evidence
• Construct testable predictions for controlled chemical investigations
• Interpret measurements while considering uncertainty and alternative explanations+ Show more

Learning Objectives

• Compare how sexual and asexual reproduction transmit genetic information.
• Distinguish inherited characteristics from environmentally influenced differences.
• Explain discrete and continuous variation using biological examples.+ Show more

Learning Objectives

• Identify practical benefits of space projects for people and communities
• Describe Canadian contributions through the Canadarm and Canadarm2
• Compare space project benefits, costs, and alternative approaches+ Show more

Learning Objectives

• Compare how air, water, and soil transport or retain substances.
• Distinguish biodegradation from toxicity using scientific evidence.
• Explain what an LD50 value measures under specified conditions.+ Show more

Learning Objectives

• Explain how spacecraft manage pressure, temperature, and radiation hazards
• Describe how life-support systems manage air and water resources
• Compare documented space technologies with speculative design possibilities+ Show more

Learning Objectives

• Interpret chemical formulas to identify types and relative numbers of atoms
• Distinguish elements from compounds using chemical representations
• Predict ionic combining ratios from positive and negative ion charges+ Show more

Learning Objectives

• Distinguish experimental evidence from theoretical atomic models.
• Explain how atomic number determines an element's identity.
• Describe the relationship between neutral atoms, protons, and electrons.+ Show more

Learning Objectives

• Explain how DNA, genes, and chromosomes relate to inherited characteristics
• Compare the outcomes and roles of mitosis and meiosis
• Distinguish natural selection from selective breeding using examples+ Show more

Learning Objectives

• Compare geocentric and heliocentric models of the solar system
• Distinguish astronomical observations from scientific models
• Explain how Galileo's observations challenged earlier explanations+ Show more

Learning Objectives

• Calculate electrical power from voltage and current measurements.
• Determine energy transferred using power and operating time.
• Convert operating time into seconds for energy calculations.+ Show more

Learning Objectives

• Explain how habitat change affects organism abundance and genetic variation
• Distinguish global extinction from regional disappearance
• Interpret habitat diagrams to identify barriers and connections+ Show more

Learning Objectives

• Compare optical and radio telescopes by the signals they detect.
• Explain how satellite measurements support Earth observation.
• Interpret geometric models used to estimate satellite-based positions.+ Show more

Learning Objectives

• Compare electricity generation methods using resource and environmental criteria
• Explain how batteries help balance electricity supply and demand
• Identify conservation actions that reduce unnecessary electricity use+ Show more

Learning Objectives

• Develop a testable prediction about changes in stream turbidity
• Identify safe procedures for investigating environmental chemistry questions
• Interpret turbidity observations and explain sources of uncertainty+ Show more

Learning Objectives

• Distinguish mixtures, pure substances, elements, and compounds by composition.
• Compare materials using measured physical properties.
• Explain how controlled conditions improve material comparisons.+ Show more

Learning Objectives

• Identify altitude and azimuth as coordinates describing an object's sky position.
• Explain how parallax observations provide evidence of relative distance.
• Interpret Doppler frequency shifts to infer motion toward or away from an observer.+ Show more

Learning Objectives

• Explain how inherited variation can influence survival and reproduction.
• Describe an organism's ecological niche using resource needs and environmental conditions.
• Compare mutualism, commensalism, and parasitism using species interactions.+ Show more

Learning Objectives

• Interpret ppm, pH, and dissolved-oxygen measurements in environmental samples
• Explain how biological observations complement chemical measurements
• Evaluate sampling plans using location, timing, and evidence limitations+ Show more

Learning Objectives

• Explain energy conversions in chemical cells, electric motors, and generators
• Describe how electromagnetic induction produces voltage in a generator
• Compare useful energy outputs with transfers to the surroundings+ Show more

Learning Objectives

• Develop testable predictions about questions in space exploration
• Plan safe investigations using appropriate observations and measurements
• Interpret sensor data while identifying uncertainty and alternative explanations+ Show more

Learning Objectives

• Develop testable predictions about biological diversity.
• Plan safe investigations with consistent sampling procedures.
• Interpret biodiversity observations and identify uncertainty.+ Show more

Learning Objectives

• Identify observable evidence that may indicate a chemical reaction
• Explain how temperature, concentration, and surface area affect reaction rates
• Design fair tests using controlled variables and consistent measurements+ Show more