Grade 9 Science Worksheets

Learning Objectives

• Explain how limiting resources such as space, light, water, and nutrients affect carrying capacity and population size
• Describe how biotic interactions (competition and predation) influence which species persist in a community
• Analyze how changes in ecological factors can shift species abundances and community composition over time

Learning Objectives

• Understand the components of homeostatic feedback loops and their roles.
• Differentiate between negative and positive feedback mechanisms.
• Explain how signaling pathways and transport processes contribute to physiological regulation.+ Show more

Learning Objectives

• Explain particle conservation using the idea that atoms are not created, destroyed, or lost during chemical reactions.
• Use particulate (atom-level) reasoning to describe how reactants transform into products.
• Identify evidence for conservation of matter from balanced counts of elements before and after a reaction.

Learning Objectives

• Explain how Newton’s concept of net force relates to changes in motion (speed and/or direction).
• Distinguish balanced forces from unbalanced forces using the idea of net force.
• Predict the direction of acceleration from the direction of net force.

Learning Objectives

• Explain how frequency, wavelength, and amplitude affect a wave’s observable characteristics
• Use the relationship between wave speed, frequency, and wavelength to predict how one parameter changes when another changes
• Interpret wave “signatures” by connecting amplitude, frequency, and wavelength to different features of a signal

Learning Objectives

• Explain how energy moves between trophic levels and why transfer efficiency differs among organisms.
• Interpret biomass trends to evaluate the effects of trophic transfers on producer and consumer populations.
• Use evidence such as nutrient concentrations and decomposition to describe how matter cycles continue in ecosystems.+ Show more

Learning Objectives

• Explain how climate variability is identified by comparing multiple weather-related measurements over long time periods.
• Differentiate variability from persistent climate change using evidence from temperature, precipitation, and wind or humidity records.
• Use examples such as El Niño–related ocean-atmosphere shifts to describe how boundary-condition changes alter regional weather statistics.

Learning Objectives

• Interpret weather data patterns using variables such as temperature, humidity (dew point), wind, and pressure
• Explain how short-term weather variability differs from longer-term climate averages
• Use evidence from data trends to describe likely precipitation timing, cloud development, and storm intensity

Learning Objectives

• Explain how Earth’s axial tilt and its orbit around the Sun produce seasonal changes
• Use the relationship between sun angle and received solar energy to predict patterns in day length and temperature
• Interpret how latitude and seasonal timing affect daylight duration

Learning Objectives

• Explain how storage reservoirs and time scales affect Earth system change
• Describe how carbon exchange among the atmosphere, oceans, living systems, and rocks influences atmospheric carbon
• Connect energy flow to evaporation, winds, temperature, and hydrologic feedbacks+ Show more

Learning Objectives

• Explain how gravity provides the centripetal force that keeps planets and moons in curved orbital paths.
• Describe how changing distance from the Sun affects orbital speed and orbital period.
• Use evidence from regular sky patterns to support the idea of predictable orbital motion.

Learning Objectives

• Explain how graphs and tables represent data and how axes, labels, and units affect interpretation.
• Identify qualitative trends and quantitative relationships in data displays, including spread and outliers.
• Use evidence from a representation tool to support cautious scientific conclusions.

Learning Objectives

• Explain how an iteration loop uses test evidence to refine a science or engineering solution.
• Identify how design changes (such as dimensions, materials, or alignment) connect to observed outcomes.
• Describe why reliability concerns and safety margins often increase as revisions clarify weak points.+ Show more

Learning Objectives

• Explain how a device can be modeled as a system with interacting components that produce intended outputs.
• Identify inputs, outputs, energy transfers, and material flow in a robotic gripper context.
• Use system boundaries and systems thinking to reason about constraints, reliability, and failure risk.

Learning Objectives

• Identify common sources of uncertainty in scientific measurements and models.
• Explain how uncertainty is estimated from data spread, instrument resolution, and systematic effects.
• Evaluate when differences between results are meaningful compared to uncertainty.

Learning Objectives

• Explain the purpose of a design cycle and the role of criteria and constraints in engineering solutions
• Identify steps in the design cycle and describe how testing evidence leads to refinement
• Apply design-cycle thinking to a real-world protective device by predicting improvements and trade-offs

Learning Objectives

• Explain the composition and function of various organ tissues.
• Describe how organs and organ systems work together to sustain life.
• Identify examples of organ systems and their key organs.+ Show more

Learning Objectives

• Understand how the nervous and endocrine systems coordinate responses to stimuli.
• Identify the roles of neural impulses and hormones in maintaining homeostasis.
• Explain how systems interact to regulate internal functions like metabolism and growth.+ Show more

Learning Objectives

• Understand how multiple organ systems coordinate through feedback loops and regulatory mechanisms.
• Describe how neural, hormonal, and local signals contribute to homeostasis during exercise.
• Analyze the cascade effects caused by disruptions in one component of multi-system networks.+ Show more

Learning Objectives

• Understand the structure of evidence-based reasoning linking observations, analyses, and claims.
• Describe standards for evidence sufficiency, consistency, and evaluation of competing explanations.
• Learn to use multiple representations—graphs, summaries, diagrams—to support inferences.+ 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

• Understand quantitative methods for assessing the fit between models and data.
• Interpret residual plots and goodness-of-fit measures to evaluate model accuracy.
• Identify patterns indicating systematic divergence or heteroscedasticity.+ Show more

Learning Objectives

• Explain how fission and fusion change atomic nuclei and release or absorb energy
• Describe the role of nuclear binding energy and mass–energy equivalence in nuclear reactions
• Compare the conditions under which fusion and fission typically occur+ Show more

Learning Objectives

• Explain how chemical reactions conserve matter by rearranging atoms rather than destroying them
• Describe how energy transfer during reactions is reflected in temperature and heat changes
• Differentiate exothermic and endothermic reactions using both energy and product outcomes

Learning Objectives

• Explain how DNA stores genetic information and how genes organize that information
• Describe how chromosomes carry genes and how chromosomes are passed to offspring during cell division
• Connect changes in genetic material to differences among individuals

Learning Objectives

• Understand the principle of conservation of mass during chemical reactions.
• Interpret balanced chemical equations to reflect mass conservation.
• Link measurable mass changes to molecular rearrangements in reactions.+ Show more

Learning Objectives

• Explain what an ecological niche includes and how it differs from habitat
• Describe how niches relate to energy flow and matter cycling
• Use niche ideas to predict outcomes of competition and community changes

Learning Objectives

• Explain how meiosis produces genetically different gametes.
• Describe how crossing over and independent assortment increase genetic variation.
• Connect meiosis variation to differences observed among siblings after fertilization.

Learning Objectives

• Explain how valence electron behavior leads to atomic bond formation
• Differentiate ionic bonding from covalent bonding using electron transfer vs. electron sharing
• Predict material properties (melting point, conductivity, and strength) based on bond type and structure+ Show more

Learning Objectives

• Explain how greenhouse gas changes can create feedbacks that amplify or reduce an initial energy imbalance
• Analyze how water vapor and ice/snow albedo can respond to warming and influence Earth’s energy balance
• Describe how clouds and atmospheric circulation can affect the balance between absorbed sunlight and outgoing infrared radiation

Learning Objectives

• Compare physical and chemical changes using system–surroundings energy transfer and particle-level explanations
• Determine whether a process is endothermic or exothermic based on the direction of heat flow and temperature changes
• Use particle motion, arrangement, and bond rearrangement ideas to explain observed temperature behavior

Learning Objectives

• Understand the principles of mechanical energy conservation and energy transfers.
• Identify and describe real-world examples of energy conversions in Alberta contexts.
• Analyze the effects of non-conservative forces like friction on energy transfer.+ Show more

Learning Objectives

• Understand the derivation and form of constant-acceleration kinematic equations.
• Apply kinematic equations to solve problems involving vertical free-fall and projectile motion.
• Interpret sign conventions and component-wise treatment in motion analysis.+ Show more

Learning Objectives

• Understand the hormonal feedback mechanisms involved in glucose regulation.
• Describe how insulin and glucagon maintain blood glucose levels.
• Explain the process of glycogenolysis and gluconeogenesis in energy balance.+ Show more

Learning Objectives

• Understand Newton's three laws of motion and their applications.
• Explain how forces affect the motion of objects in real-world contexts.
• Analyze and interpret motion patterns using Newtonian principles.+ Show more

Learning Objectives

• Explain how distance and time relate to speed using data and graphs
• Describe how changing speed over time indicates acceleration
• Distinguish constant speed (linear distance–time pattern) from changing speed (nonlinear pattern)

Learning Objectives

• Differentiate heat transfer from work transfer as two distinct pathways for energy movement.
• Explain how energy changes in a system can be described as coming from or going to surroundings through heat and/or work.
• Apply heat and work ideas to physical and chemical changes using correct scientific reasoning.

Learning Objectives

• Explain how conservation of matter applies to chemical reactions and balanced equations.
• Use atom counting to balance simple chemical equations with correct coefficients.
• Interpret coefficients as particle ratios while keeping subscripts unchanged.

Learning Objectives

• Explain how waves transfer energy (and sometimes information) without transporting matter overall
• Relate frequency, wavelength, and amplitude to observable wave behavior and the energy a wave carries
• Use wave-property relationships to predict how changes in a wave affect its motion and signaling capability

Learning Objectives

• Explain how predation, competition, and mutualism connect species in an ecosystem network
• Analyze how environmental factors (water, temperature, nutrients) influence survival, growth, and population sizes
• Describe how changes in one species or resource can cascade through interaction networks and affect stability

Learning Objectives

• Explain how forces combine to produce a net force and how net force relates to acceleration.
• Determine the direction of acceleration when forces oppose each other.
• Use the idea of net force being nonzero to predict changes in motion.

Learning Objectives

• Explain how quantitative measurements constrain scientific claims and models.
• Use model predictions to evaluate competing explanations for motion, forces, energy transfer, or wave behavior.
• Identify and justify assumptions in scientific models and describe how evidence supports them.

Learning Objectives

• Explain how allele combinations in parents determine the possible genotypes of offspring
• Use probability to predict the expected proportions of phenotypes across multiple generations
• Interpret dominance and recessiveness to understand how recessive traits may be hidden

Learning Objectives

• Explain how alleles form genotypes and how genotypes determine phenotypes using dominant and recessive relationships
• Use genotype–phenotype reasoning to predict inheritance outcomes across generations
• Interpret heredity evidence (such as ratios and pedigrees) to support conclusions about dominant vs. recessive traits

Learning Objectives

• Explain how disturbances can change ecosystem stability through altered species interactions and environmental conditions
• Describe how resilience, recovery rate, and ecological thresholds influence whether an ecosystem returns to its prior state
• Use long-term population and community data to distinguish gradual change from rapid ecosystem shifts+ Show more

Learning Objectives

• Explain how Earth’s water cycle moves matter and energy among reservoirs such as oceans, clouds, land, groundwater, and ice
• Describe how carbon moves among the atmosphere, living things, oceans, and rocks through processes like photosynthesis and respiration
• Connect incoming solar radiation and outgoing Earth radiation balance to temperature and weather patterns

Learning Objectives

• Explain how cellular structures (nucleus, mitochondria, membranes) support specific functions
• Describe how organism-level structures (bones, muscles, plant tissues, skin) reflect their biological roles
• Use model-based reasoning to link a structure’s physical properties to what it does+ Show more

Learning Objectives

• Explain how relative positions of the Sun, Moon, and Earth determine Moon phases.
• Describe why eclipses require specific alignment and do not occur every month.
• Use viewing geometry and orbital tilt to predict when eclipses are more likely.