Grade 9 Science Worksheets

Learning Objectives

• Explain how protons, neutrons, and electrons determine atomic number, mass number, and isotopes
• Use simple atomic models to describe how electron location relates to chemical behavior
• Connect atomic composition to properties of elements and the formation of compounds+ Show more

Learning Objectives

• Explain how land conversion, pollution, resource extraction, invasive species, and greenhouse gas emissions can change biodiversity and ecosystem functioning.
• Describe how habitat fragmentation and chemical or nutrient changes can alter species interactions, community composition, and trophic relationships.
• Connect changes in species diversity to ecosystem services such as pollination, water purification, and soil formation.

Learning Objectives

• Define Mendelian inheritance and identify traits that follow Mendel's laws.
• Describe the concepts of dominant and recessive alleles.
• Explain how Punnett squares are used to predict genetic outcomes.+ Show more

Learning Objectives

• Explain how allosteric and covalent mechanisms regulate enzyme activity to control metabolic flux.
• Describe how compartment-specific regulation helps coordinate catabolism and anabolism.
• Use feedback inhibition and hormonal signaling to predict pathway responses to changing substrate levels.

Learning Objectives

• Understand the principles of impulse and force-time relationships in collisions.
• Analyze the effectiveness of various crash mitigation strategies like crumple zones and airbags.
• Interpret force‑time graphs to evaluate impact forces during collisions.+ Show more

Learning Objectives

• Explain how allele frequency and trait variation can appear as statistical patterns in populations
• Describe how mutations, gene interactions, and random processes create genetic diversity
• Connect natural selection to changes in trait representation from one generation to the next

Learning Objectives

• Understand key factors affecting population sizes such as carrying capacity, competition, and predation.
• Analyze mathematical models including logistic growth and predator-prey cycles.
• Evaluate the impact of human activities on natural population dynamics.+ Show more

Learning Objectives

• Understand how acceleration relates to changes in speed during measured intervals.
• Interpret distance–time and speed–time data to analyze acceleration patterns.
• Identify whether acceleration is constant or changing based on data patterns and curve shapes.+ Show more

Learning Objectives

• Explain how alleles combine to form genotypes and influence observable traits (phenotypes).
• Use dominance relationships to predict phenotypes from given allele combinations.
• Describe how multiple alleles and multiple genes can produce continuous variation across generations.

Learning Objectives

• Compare how different energy sources and mineral extraction methods affect the environment and society across the life cycle.
• Evaluate trade-offs among emissions, land disturbance, water use, and remediation when making resource choices.
• Use supply constraints and long-term planning to justify more sustainable regional decisions.

Learning Objectives

• Describe the key steps of the Calvin cycle and its role in photosynthesis.
• Explain how ATP and NADPH are utilized during carbon fixation and sugar synthesis.
• Identify the enzymes involved in the Calvin cycle, especially ribulose bisphosphate carboxylase.+ Show more

Learning Objectives

• Calculate work using the dot-product idea: W = F d cos(θ) for constant force and displacement
• Differentiate work done by constant forces versus variable forces
• Approximate work for variable forces using areas under a force–distance graph+ Show more

Learning Objectives

• Explain Newton’s first law using the relationship between net external force and changes in motion
• Distinguish between rest, constant velocity, and acceleration using balanced vs. unbalanced forces
• Use inertia and equilibrium to predict how objects behave on low-friction and everyday surfaces

Learning Objectives

• Explain how human activities can reduce biodiversity through habitat conversion, pollution, extraction, invasive species, and greenhouse gas emissions.
• Describe how habitat fragmentation and changes in nutrient and chemical inputs can alter food webs and ecosystem processes.
• Connect biodiversity changes to ecosystem services such as pollination, water purification, and soil formation.+ Show more

Learning Objectives

• Understand how scientific evidence supports or challenges claims.
• Interpret data patterns to infer explanations.
• Evaluate alternative interpretations of evidence.+ Show more

Learning Objectives

• Understand the concepts of power and efficiency in energy transfer.
• Identify real-world examples of power and efficiency in engineering systems.
• Compare input power, useful work output, and energy losses to assess performance.+ Show more

Learning Objectives

• Understand how ice cores, tree rings, marine sediments, and speleothems serve as proxies for past climate conditions.
• Interpret isotopic ratios and growth increments in paleoclimate data.
• Relate proxy indicators to historical climate patterns and events.+ Show more

Learning Objectives

• Understand how series and parallel circuit elements combine to form complex networks.
• Learn methods for simplifying mixed circuits by identifying equivalent resistances.
• Trace current and voltage distribution in combined circuits to analyze load sharing.+ Show more

Learning Objectives

• Explain Mendelian inheritance using segregation and predictable dominant/recessive phenotypes
• Compare non-Mendelian inheritance patterns (incomplete dominance, codominance, multiple alleles, sex-linked, imprinting, mitochondrial)
• Describe how linkage and environmental interactions can change observed phenotypic ratios

Learning Objectives

• Define empirical evidence and understand its importance in scientific research.
• Identify observable and measurable data within scientific contexts.
• Recognize patterns in data that support scientific conclusions.+ Show more

Learning Objectives

• Explain how urbanization, deforestation, agriculture, and infrastructure alter watershed processes such as runoff, sediment transport, nutrient flux, and groundwater recharge.
• Describe how watershed changes can affect channel morphology, flood frequency, and aquatic ecosystem health.
• Use turbidity and discharge as indicators to interpret water-quality and flow changes in a watershed.

Learning Objectives

• Understand how acceleration relates to changes in speed over measured intervals.
• Interpret distance–time and speed–time data to identify patterns of acceleration.
• Differentiate between constant and changing acceleration based on data patterns.+ Show more

Learning Objectives

• Explain what a limiting reactant is and how it controls the maximum amount of product formed.
• Calculate theoretical yield from balanced mole ratios and molar masses.
• Distinguish actual yield from theoretical yield and compute percent yield.+ Show more

Learning Objectives

• Explain how appropriate scales, calibrated instruments, and consistent units affect measurement accuracy.
• Use significant figures and uncertainty ranges to report measurements with justified precision.
• Convert between units and record data consistently to support fair comparisons.

Learning Objectives

• Understand the concept of power and how it is measured in mechanical systems.
• Learn the definition of efficiency and how it compares useful output to input energy.
• Recognize the common ways energy is lost in real systems, affecting efficiency.+ Show more

Learning Objectives

• Understand how urbanization influences watershed processes.
• Identify human activities that impact water flow and sediment load.
• Explain consequences of watershed alterations on ecosystems and flood regimes.+ Show more

Learning Objectives

• Explain how scale models help connect observable features of the night sky to real distances and sizes in the solar system.
• Describe how perspective affects apparent motion and brightness of planets as Earth orbits the Sun.
• Use relative reasoning about orbital periods and repeating patterns to interpret sky observations.

Learning Objectives

• Explain how forces can change an object’s motion through push or pull effects
• Distinguish between contact forces and non-contact forces using real-world Alberta examples
• Describe how force magnitude and direction combine to predict qualitative motion

Learning Objectives

• Explain how multiple types of evidence (fossil, anatomical, and molecular) support common ancestry.
• Describe how transitional fossils, homologous structures, and DNA/molecular sequences help build evolutionary explanations.
• Use dating methods and biogeographic patterns to connect evidence to time and diversification.

Learning Objectives

• Define and distinguish between models, explanations, and theories in science.
• Explain how models represent phenomena at different levels of detail.
• Understand the role of theories in scientific frameworks and their openness to revision.+ Show more

Learning Objectives

• Differentiate ionic, covalent, and metallic bonding based on electron behavior
• Connect bond type to observable properties such as melting point, conductivity, and solubility
• Use bond type vocabulary to explain why materials behave the way they do

Learning Objectives

• Synthesize how reproduction type affects genetic diversity in breeding programs
• Explain how inheritance mechanisms (chromosomes and Mendelian patterns) determine trait outcomes
• Analyze how selection changes variation and connects to ecological and ethical consequences

Learning Objectives

• Explain how variance, standard deviation, range, and interquartile range measure spread in data
• Use the coefficient of variation to compare variability across measurements with different units or scales
• Interpret how overlapping distributions and quantified variability affect the strength of evidence in sampling and hypothesis comparisons

Learning Objectives

• Explain how coefficients in chemical equations represent relative particle amounts
• Balance simple chemical equations using conservation of matter
• Interpret what a balanced equation implies about reactants and possible products+ Show more

Learning Objectives

• Explain how lithospheric plate motion creates divergent, convergent, and transform boundaries
• Describe how subduction and continental collision build features such as ocean basins and mountain ranges
• Use earthquake and volcanic patterns to infer plate interactions+ Show more

Learning Objectives

• Understand the differences between mean, median, and mode and their appropriate use cases.
• Explain how skewness, outliers, and multimodal distributions influence the choice of a measure of central tendency.
• Connect the selection of a central tendency to assumptions about data distribution and underlying processes.+ Show more

Learning Objectives

• Explain how inherited traits and alleles can influence survival and reproduction in specific environments
• Describe how natural selection changes allele frequencies at the population level
• Use examples such as camouflage and feeding efficiency to connect adaptations to fitness

Learning Objectives

• Explain how genes (DNA segments) can determine protein production and influence observable traits (phenotypes).
• Describe the basic steps of gene expression: transcription and translation.
• Identify how gene regulation and environmental factors can change protein amounts or functions, leading to phenotypic variation.

Learning Objectives

• Explain how individual forces combine to determine net force, including both magnitude and direction
• Predict the direction and presence of acceleration when forces oppose each other
• Distinguish between balanced and unbalanced forces using the net force being zero or nonzero+ Show more

Learning Objectives

• Explain how fitness relates to survival and reproduction in a specific environment
• Describe how heritable traits can change in frequency through natural selection
• Analyze how changing environments can alter which traits are most advantageous+ Show more

Learning Objectives

• Identify signs of chemical change such as color shifts, gas evolution, precipitate formation, temperature change, and irreversibility.
• Recognize real-world examples of chemical changes in environmental and industrial contexts.
• Understand how observable markers indicate the formation of new substances in chemical reactions.

Learning Objectives

• Understand the role of ATP as the main energy currency in cells.
• Describe the basic processes of cellular respiration and photosynthesis.
• Identify the electron transport chains in mitochondria and chloroplasts.+ Show more

Learning Objectives

• Interpret patterns in data using graphs and tables, focusing on direction, spread, and outliers.
• Choose appropriate axes, scales, and labels to align claims with evidence.
• Evaluate statements about data representation tools using accurate reasoning.

Learning Objectives

• Explain how different paleoclimate proxies (ice cores, tree rings, marine sediments, and speleothems) record past climate conditions
• Use proxy indicators (isotopic ratios, growth increments, microfossil assemblages) to infer past variability and climate cycles
• Describe how age models and uncertainty help connect proxy signals to temporal climate patterns and possible forcings

Learning Objectives

• Understand the basic steps of DNA replication
• Identify key enzymes involved in DNA replication
• Describe the division of leading and lagging strands+ Show more

Learning Objectives

• Explain how gravitational force depends on mass and distance.
• Describe how orbital speed and distance work together to create stable orbits.
• Use observed orbital patterns to support claims about predictable motion in space.

Learning Objectives

• Understand the basic properties of solids
• Describe how solids maintain shape and volume
• Identify examples of solids in the environment

Learning Objectives

• Identify major sources of genetic variation, including mutation, recombination, gene flow, and chromosomal rearrangements.
• Explain how these processes change allele combinations and allele frequencies within and between populations.
• Evaluate how human actions (e.g., introductions, managed breeding, hybridization) can affect genetic diversity and evolutionary outcomes.