Grade 9 Worksheets

Learning Objectives

• Explain how interaction time affects average collision force
• Describe how deformation can absorb energy during collisions
• Interpret force-time graphs to compare safety designs+ Show more

Learning Objectives

• Interpret long-term atmospheric carbon dioxide records
• Explain how fossil fuel combustion alters Earth systems
• Describe how deforestation can influence atmospheric carbon dioxide+ Show more

Learning Objectives

• Identify geological and atmospheric processes that produce natural hazards
• Interpret hazard maps and recurrence intervals
• Explain how paleoevidence reveals past hazardous events+ Show more

Learning Objectives

• Explain how processes transform rocks through the rock cycle
• Relate temperature and pressure to mineral stability
• Trace pathways among igneous, sedimentary, and metamorphic rocks+ Show more

Learning Objectives

• Analyze how land-use change affects biodiversity and ecosystem functioning
• Explain how agricultural runoff changes aquatic ecosystem conditions
• Interpret evidence about human impacts on ecosystem dynamics+ Show more

Learning Objectives

• Explain how DNA stores and transmits hereditary information.
• Describe how DNA replication preserves information during cell division.
• Explain how meiosis separates homologous chromosomes into gametes.+ Show more

Learning Objectives

• Explain why energy decreases between successive trophic levels
• Interpret food webs and trophic pyramids as ecosystem models
• Describe ecological efficiency and production-to-biomass ratios+ Show more

Learning Objectives

• Explain how photosynthesis stores energy and cycles carbon and oxygen
• Describe how cellular respiration affects producer biomass and consumer energy
• Calculate net primary productivity from production and respiration values+ Show more

Learning Objectives

• Identify major mechanisms that generate genetic variation.
• Explain how mutations can alter DNA and protein function.
• Describe how crossing-over creates new allele combinations.+ Show more

Learning Objectives

• Explain dominant and recessive allele interactions during inheritance.
• Construct Punnett squares to predict genotype and phenotype ratios.
• Compare Mendelian inheritance with incomplete dominance and codominance.+ Show more

Learning Objectives

• Explain how carbon, nitrogen, and phosphorus move among ecosystem reservoirs
• Identify decomposition, fixation, mineralization, and sedimentation in nutrient cycling
• Apply mass-balance ideas to nutrient reservoirs and fluxes+ Show more

Learning Objectives

• Explain how carrying capacity limits population growth
• Distinguish density-dependent from density-independent effects
• Interpret logistic growth and predator-prey population patterns+ 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

• 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 biological diversity.
• Plan safe investigations with consistent sampling procedures.
• Interpret biodiversity observations and identify uncertainty.+ 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

• 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

• 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 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

• 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

• 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

• 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

• 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

• 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 amount, chemical form, and context affect substance harm.
• Describe how uptake and elimination influence substance retention.
• Interpret dilution models to compare environmental concentrations.+ Show more

Learning Objectives

• Distinguish static charge from sustained electric current
• Explain how conductors, resistors, and switches affect circuit current
• Calculate voltage, current, or resistance using Ohm's law+ 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

• 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

• 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

• 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

• 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

• 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

• 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

• 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

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

• 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

• Distinguish primary succession from secondary succession using soil conditions
• Explain how pioneer species contribute to soil development
• Identify factors that influence community composition during succession+ Show more

Learning Objectives

• Explain how chloroplasts and mitochondria contribute to energy transformations.
• Describe how the endoplasmic reticulum and Golgi apparatus process cellular materials.
• Explain how transport vesicles move materials between cellular compartments.+ Show more

Learning Objectives

• Distinguish genotype from phenotype using relevant examples.
• Interpret genotype and phenotype frequencies in small populations.
• Describe how PCR supports genetic data analysis.+ Show more

Learning Objectives

• Identify the roles of thermoreceptors and the hypothalamus in temperature control
• Compare vasodilation and vasoconstriction in regulating heat loss
• Explain how sweating and evaporation help cool the body+ Show more

Learning Objectives

• Identify reservoirs in the atmosphere, hydrosphere, lithosphere, and biosphere
• Explain how photosynthesis and decomposition transfer carbon
• Describe nitrogen fixation and its role in nitrogen cycling+ Show more

Learning Objectives

• Explain how RNA polymerase produces mRNA from a DNA template.
• Identify the roles of promoters and terminators in transcription.
• Describe how codons and anticodons guide amino acid assembly.+ Show more

Learning Objectives

• Explain how promoters and transcription factors influence transcription
• Compare the effects of enhancers and silencers on gene activity
• Describe how DNA methylation affects gene expression+ Show more

Learning Objectives

• Explain how nitrogen and phosphorus move through ecosystems.
• Describe nitrogen fixation, assimilation, mineralization, and denitrification.
• Distinguish the major pathways of nitrogen and phosphorus cycling.+ Show more

Learning Objectives

• Explain how DNA, RNA and protein similarities indicate common ancestry
• Identify conserved sequences and describe their biological significance
• Explain how sequence divergence reveals differences between evolutionary lineages+ Show more

Learning Objectives

• Describe how glycolysis converts one glucose molecule into two pyruvate molecules
• Identify the location and major phases of glycolysis
• Calculate the net ATP yield from ATP consumption and production+ Show more

Learning Objectives

• Explain how fossil sequences reveal chronological patterns in evolutionary history.
• Identify transitional forms from combinations of ancestral and later traits.
• Distinguish homologous structures from analogous structures using anatomy.+ Show more