Grade 9 Science Worksheets

Learning Objectives

• Understand the methods used to detect and measure pollution in air and water.
• Identify different indicators and patterns that reveal pollution movement.
• Explain how pollution sources and processes are linked through monitoring data.+ Show more

Learning Objectives

• Explain how allosteric enzyme control and covalent modification change metabolic pathway activity
• Describe how feedback inhibition and hormonal signals shift flux between catabolism and anabolism
• Model how enzyme kinetics and substrate concentration affect pathway rates and predict responses to sustained nutrient changes

Learning Objectives

• Explain how genetic variation (alleles and mutations) creates differences in traits within a population.
• Describe how allele frequencies relate to the distribution of traits in the next generation.
• Analyze how natural selection changes allele frequencies over time based on survival and reproduction.+ Show more

Learning Objectives

• Understand the interactions among geosphere, hydrosphere, atmosphere, and biosphere.
• Describe material and energy exchanges between Earth's spheres.
• Use conceptual models and diagrams to explain coupled environmental phenomena.+ Show more

Learning Objectives

• Describe the interactions among the geosphere, hydrosphere, atmosphere, and biosphere using conceptual models.
• Explain material and energy exchanges such as riverine nutrient transport, soil-atmosphere gas fluxes, and ocean upwelling effects.
• Use spatial schematics, mass-balance thinking, and causal chains to interpret coupled environmental phenomena.+ Show more

Learning Objectives

• Describe the interactions among the geosphere, hydrosphere, atmosphere, and biosphere using models and diagrams.
• Explain material and energy exchanges such as nutrient transport, gas fluxes, and ocean upwelling effects.
• Use spatial schematics and causal chains to interpret coupled environmental phenomena and feedbacks.

Learning Objectives

• Explain why impact evaluation must consider benefits, risks, tradeoffs, and unintended consequences over time.
• Identify common categories of impacts (environmental, health, resource use) and how engineers can mitigate harm.
• Use evidence-based criteria to compare alternatives and make a reasoned recommendation.

Learning Objectives

• Describe the mechanisms that regulate metabolic pathways, including allosteric enzyme control and covalent modifications.
• Explain feedback inhibition and hormonal signals that influence energy flux between catabolism and anabolism.
• Model how enzyme kinetics and substrate concentrations determine pathway rates and system responses to perturbations.+ Show more

Learning Objectives

• Understand the concept of systems thinking and how components within a system interact
• Identify examples of systems in nature and engineered solutions
• Describe how changes in one part of a system can affect other parts and overall system behavior

Learning Objectives

• Understand the concept of systems thinking and its importance in science.
• Identify components and interactions within a system.
• Recognize how changes in one part of a system can affect the whole.+ Show more

Learning Objectives

• Explain how biodiversity supports ecosystem stability and resilience.
• Describe how environmental change and human activities can alter biodiversity.
• Connect shifts in biodiversity to changes in ecosystem functions like matter and energy cycles.

Learning Objectives

• Interpret evidence from atmospheric carbon dioxide records and global temperature trends to explain anthropogenic climate change.
• Describe how land-use change (deforestation, urbanization) can contribute to altered climate and ecosystem disruption.
• Analyze how changes in precipitation patterns and vegetation can affect the biosphere and hydrosphere.

Learning Objectives

• Understand the concept of biodiversity and its importance in ecosystems
• Identify different types of biodiversity: genetic, species, and ecosystem diversity
• Recognize how environmental changes can impact biodiversity+ Show more

Learning Objectives

• Explain how biodiversity (species and genetic variation) supports ecosystem stability
• Analyze how environmental and human factors can change population sizes and species interactions
• Evaluate how biodiversity loss or gain affects ecosystem functions like resilience and nutrient/energy cycling

Learning Objectives

• Understand the regulatory mechanisms that coordinate metabolic pathways, including allosteric enzyme control and covalent modifications.
• Explain feedback inhibition and hormonal signals that shift metabolic flux between catabolism and anabolism.
• Model how enzyme kinetics and substrate concentrations influence pathway rates.+ Show more

Learning Objectives

• Understand the significance of atmospheric carbon dioxide measurements over time.
• Analyze data trends like the Keeling Curve to understand greenhouse gas changes.
• Identify human activities contributing to increased CO2 levels such as fossil fuel use and deforestation.+ Show more

Learning Objectives

• Explain why impact evaluation is necessary when science and technology affect society and the natural world.
• Identify key impact categories (environmental effects, health outcomes, resource use, and unintended consequences).
• Use evidence-based criteria to compare options and justify tradeoff decisions over time.

Learning Objectives

• Understand the interactions among the geosphere, hydrosphere, atmosphere, and biosphere.
• Explain material and energy exchanges such as nutrient transport, gas fluxes, and ocean upwelling.
• Use conceptual models and diagrams to interpret coupled environmental phenomena.+ 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

• Explain how biodiversity (species diversity and genetic variation) supports ecosystem stability.
• Describe how environmental change can shift population sizes and species interactions.
• Analyze how human activities can increase or reduce biodiversity and influence ecosystem functions.+ Show more

Learning Objectives

• Explain how the geosphere, hydrosphere, atmosphere, and biosphere are connected through matter and energy exchanges
• Use cause-and-effect reasoning and mass-balance thinking to interpret cross-domain environmental processes
• Describe how coupled sphere processes can produce observable patterns in time and space

Learning Objectives

• Explain how conduction, convection, and radiation transfer thermal energy in everyday situations.
• Use particle ideas and fluid motion to describe conduction and convection, respectively.
• Describe why radiation can transfer heat through space and does not require a medium.+ Show more

Learning Objectives

• Understand and identify the three main modes of heat transfer: conduction, convection, and radiation.
• Describe how heat transfer occurs in everyday scenarios.
• Differentiate between the mechanisms of heat transfer based on their characteristics.

Learning Objectives

• Explain how thermal energy transfers through conduction, convection, and radiation
• Identify real-world examples of each heat transfer mode and justify why they occur
• Compare whether a medium is required for heat transfer and relate this to everyday phenomena

Learning Objectives

• Understand how science and technology influence society and the environment.
• Evaluate benefits, risks, and tradeoffs of different technological impacts.
• Analyze environmental effects, health outcomes, and unintended consequences of engineering decisions.+ Show more

Learning Objectives

• Explain the interactions among the geosphere, hydrosphere, atmosphere, and biosphere using models and diagrams.
• Identify material and energy exchanges such as nutrient transport, gas fluxes, and ocean upwelling.
• Analyze how surface processes affect transient environmental signals through spatial and causal frameworks.+ Show more

Learning Objectives

• Analyze historical atmospheric CO2 records and land-use change data.
• Identify the effects of anthropogenic activities on the biosphere and hydrosphere.
• Evaluate evidence linking human emissions to climate variable alterations.+ Show more

Learning Objectives

• Analyze historical atmospheric CO2 records and land-use change
• Explain the effects of fossil fuel combustion and deforestation on climate
• Identify indicators of human impact such as the Keeling Curve and satellite data+ Show more

Learning Objectives

• Explain how allele frequency differences within a population can produce variation in traits among individuals.
• Describe how random processes, heritable mutations, and gene interactions contribute to population-level trait diversity.
• Use natural selection to predict how allele frequencies and trait distributions may change over generations.+ 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

• Explain how historical atmospheric carbon dioxide records and land-use changes illustrate human impacts on the climate.
• Identify key evidence linking fossil fuel combustion, deforestation, and urbanization to climate change and ecosystem disruption.
• Analyze observed indicators such as the Keeling Curve and satellite data to understand anthropogenic effects on the biosphere and hydrosphere.

Learning Objectives

• Explain how monitoring air and water quality provides evidence of pollution changes over time.
• Describe how chemical indicators, flow conditions, and spatial patterns help identify pollution sources and pathways.
• Evaluate strategies that prevent or reduce emissions to minimize downstream environmental harm.

Learning Objectives

• Understand the evidence linking human activities such as fossil fuel combustion and deforestation to climate change
• Analyze historical and satellite data indicating environmental changes over time
• Evaluate the impacts of anthropogenic change on the biosphere and hydrosphere+ Show more

Learning Objectives

• Understand how chemical indicators are used to monitor air quality.
• Identify different types of chemical tests for detecting pollutants.
• Interpret data from chemical indicators to assess pollution levels.+ Show more

Learning Objectives

• Explain how scientists and engineers evaluate the benefits, risks, and tradeoffs of technologies over time.
• Identify environmental, health, and resource impacts, including unintended consequences.
• Use criteria such as reliability, emissions, land impact, and risk mitigation to compare solutions.

Learning Objectives

• Explain the interactions among the geosphere, hydrosphere, atmosphere, and biosphere using conceptual models.
• Identify key processes such as riverine nutrient transport, soil-atmosphere gas fluxes, and ocean upwelling effects.
• Understand how spatial schematics and mass-balance thinking help interpret environmental system feedbacks.+ Show more

Learning Objectives

• Explain how the geosphere, hydrosphere, atmosphere, and biosphere interact through matter and energy exchanges.
• Use causal chains and mass-balance thinking to describe how nutrients, gases, and productivity move between Earth systems.
• Interpret coupled phenomena (such as river nutrient transport and ocean upwelling) using cross-domain models.

Learning Objectives

• Explain why monitoring air and water quality is essential for preventing environmental harm
• Interpret how chemical indicators, flow conditions, and spatial patterns can reveal pollution sources and movement
• Apply scientific reasoning to connect measurement design with management decisions that reduce downstream effects

Learning Objectives

• Describe how materials and energy move between the geosphere, hydrosphere, atmosphere, and biosphere using conceptual models.
• Use mass-balance thinking and causal chains to explain coupled Earth-system phenomena (e.g., nutrient transport, gas flux, ocean upwelling).
• Interpret surface processes as signals that can change over time using baseline representations.

Learning Objectives

• Understand interactions among the geosphere, hydrosphere, atmosphere, and biosphere.
• Identify material and energy exchanges between Earth's spheres.
• Use conceptual models and diagrams to interpret environmental phenomena.+ Show more

Learning Objectives

• Understand the core relationships among displacement, velocity, and acceleration along a straight line.
• Interpret position–time and velocity–time graphs to analyze motion.
• Apply constant-acceleration equations to solve kinematic problems.+ Show more

Learning Objectives

• Explain how constraints shape feasible engineering designs
• Translate constraints into measurable requirements and identify trade-offs
• Evaluate design options for a system under power, flow, cost, regulatory, and environmental limits+ Show more

Learning Objectives

• Explain the biochemical pathways involved in cellular respiration and energy production.
• Describe the roles of mitochondria and chloroplasts in metabolism.
• Analyze the relationship between energy flow, ATP synthesis, and organismal energy balance.+ Show more

Learning Objectives

• Explain how cellular respiration and photosynthetic carbon fixation connect to organelles and energy needs
• Describe key stages of cellular respiration (glycolysis, citric acid cycle, and electron transport) and how they contribute to ATP production
• Use quantitative reasoning to interpret reactants/products and relate oxygen consumption and ATP yield to metabolic flux

Learning Objectives

• Interpret position–time and velocity–time graphs to determine displacement and acceleration for one-dimensional motion
• Use constant-acceleration relationships to predict position and velocity from initial conditions
• Connect slopes and areas on kinematic graphs to physical quantities

Learning Objectives

• Describe the processes of radiative balance, latent heat transfer, conduction, and convection in atmospheric and oceanic systems.
• Interpret global energy budget diagrams and flux tables to understand circulation patterns.
• Relate energy partitioning to observable climate indicators such as surface temperature and sea surface temperature anomalies.+ Show more

Learning Objectives

• Describe the biochemical pathways involved in cellular respiration, including glycolysis, the citric acid cycle, and electron transport.
• Explain the role of ATP in energy transfer and how energy coupling occurs within cells.
• Relate mitochondrial and chloroplast functions to metabolic pathways like respiration and photosynthesis.+ Show more

Learning Objectives

• Explain how mitochondria, chloroplasts, endoplasmic reticulum, and lysosomes contribute to cellular maintenance and metabolic pathways.
• Connect organelle internal structures (cristae, thylakoid stacks, folded membranes) to specific functional outcomes (ATP synthesis, light capture, macromolecule processing).
• Use compartmentation and energy-flow ideas to describe how cells coordinate anabolic and catabolic reactions efficiently.