Grade 9 Science Worksheets

Learning Objectives

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

Learning Objectives

• Understand the role of models in scientific explanations
• Identify different types of scientific models
• Evaluate how models are used to interpret measurement data+ Show more

Learning Objectives

• Understand the different lines of evidence used to infer evolutionary relationships.
• Identify how fossil, anatomical, and molecular data support evolutionary history.
• Explain the importance of integrating multiple evidence types to reconstruct biodiversity over time.

Learning Objectives

• Understand the principles of safe and effective electrical system use in various applications.
• Learn to match device ratings and functions with appropriate power sources and environmental conditions.
• Identify protective measures essential for safety and efficiency in electrical systems.+ Show more

Learning Objectives

• Understand that genes are DNA segments encoding proteins and regulatory elements influencing phenotype.
• Explain the processes of transcription and translation in gene expression.
• Describe how gene regulation affects protein production and phenotypic traits.+ Show more

Learning Objectives

• Differentiate between heat and temperature.
• Explain basic mechanisms of heat transfer: conduction, convection, radiation.
• Perform calculations involving specific heat capacity, mass, and temperature change.+ Show more

Learning Objectives

• Identify major cell components (membranes, organelles, cytoskeleton) and describe how they support cellular functions.
• Explain how compartmentalization affects diffusion, selective transport, and metabolism.
• Analyze how membrane or organelle damage can change diffusion/transport rates and reduce metabolic efficiency.

Learning Objectives

• Explain how friction and drag act as opposing forces to relative motion
• Analyze how friction and drag can change acceleration in real-world situations
• Relate friction to contact conditions and normal force, and drag to speed and fluid resistance

Learning Objectives

• Explain the process of photosynthesis and its significance in converting solar energy to chemical energy.
• Identify the inputs and outputs involved in photosynthesis.
• Describe the role of pigments and the compartments within chloroplasts during photosynthesis.+ Show more

Learning Objectives

• Describe the components of Milankovitch cycles and their influence on Earth's climate.
• Explain how variations in Earth's orbit affect glacial and interglacial periods.
• Identify the three main orbital parameters involved in Milankovitch cycles and their effects on insolation.+ Show more

Learning Objectives

• Understand how to represent temporally changing systems using time-series descriptions.
• Analyze the behavior of dynamic systems through difference equations and phase diagrams.
• Identify feedback loops, equilibrium states, and transient versus steady-state behavior from data.+ Show more

Learning Objectives

• Understand the concept of energy conservation in systems.
• Identify different forms of energy transfer and transformation.
• Describe how energy moves within systems through diagrams and real-life examples.+ Show more

Learning Objectives

• Identify and distinguish between physical and chemical changes.
• Explain energy transfer in endothermic and exothermic reactions.
• Describe how particle motion and arrangement change during physical and chemical processes.+ Show more

Learning Objectives

• Understand key concepts of environmental chemistry, including mass conservation and chemical change.
• Interpret observable evidence of environmental transformations using particulate and atomic explanations.
• Apply mass accounting principles to regional environmental issues such as acid deposition, tailings chemistry, and nutrient cycling.

Learning Objectives

• Understand the components involved in homeostatic feedback loops.
• Distinguish between negative and positive feedback mechanisms.
• Explain how signaling pathways and transport processes facilitate feedback responses.

Learning Objectives

• Explain the concept of work as energy transfer caused by a force acting through a distance.
• Describe how simple machines alter force, distance, and mechanical advantage in real-world Alberta contexts.
• Analyze the trade-offs between force reduction and distance increase in machine design and performance.

Learning Objectives

• Understand the mechanisms involved in body temperature regulation.
• Identify physiological responses that maintain thermoregulation.
• Explain the roles of skin, vasculature, and nervous pathways in heat balance.+ Show more

Learning Objectives

• Understand the principle of conservation of linear momentum in isolated systems.
• Differentiate between elastic and inelastic collisions using quantitative analysis.
• Calculate total momentum before and after interactions in various scenarios.+ Show more

Learning Objectives

• Explain the pathway from DNA to RNA to proteins (gene expression) and how it relates to cell function
• Describe how protein structure affects protein function inside cells
• Use molecular reasoning to connect genotype (DNA sequence) to phenotype (observable traits)

Learning Objectives

• Understand the key factors influencing population growth and decline.
• Explain the difference between density-dependent and density-independent factors.
• Describe how population patterns affect community interactions and ecosystem dynamics.+ Show more

Learning Objectives

• Explain how passive diffusion, facilitated transport, and active transport move substances across cell membranes using concentration and energy gradients.
• Use quantitative reasoning (concentration differences and relative permeability) to predict net movement and cellular homeostasis outcomes.
• Describe how membrane composition and transport proteins help maintain osmotic balance and electrochemical gradients in different cellular compartments.+ Show more

Learning Objectives

• Understand the processes of glycolysis, the citric acid cycle, and electron transport in cellular respiration
• Identify where in the cell these processes occur and their roles in ATP production
• Relate metabolic pathways to organismal energy balance and organelle function+ Show more

Learning Objectives

• Describe the basic structure and functions of a cell.
• Identify major organelles and their roles within the cell.
• Explain how cell structure relates to its function.+ Show more

Learning Objectives

• Explain the process of light reactions in photosynthesis.
• Identify the role of pigment complexes and photosystems.
• Describe how electron flow leads to ATP and NADPH production.+ Show more

Learning Objectives

• Interpret position–time and velocity–time graphs by connecting slope and area to velocity and displacement
• Use constant-acceleration equations to predict motion along a straight line and check the direction with signs
• Relate acceleration (including negative values) to changes in velocity and the “curving” or “straightness” of motion graphs

Learning Objectives

• Explain how molecular defects can influence organ system function and organism health.
• Interpret data from biochemical, histological, and organ function assays to diagnose physiological dysfunction.
• Construct explanatory accounts connecting genetic variation to cellular responses and system performance.+ Show more

Learning Objectives

• Describe the mechanisms of carbon and nitrogen cycles in ecosystems.
• Explain how trophic transfer influences energy flow and biomass distribution.
• Analyze the effects of perturbations like nutrient enrichment and invasive species on community structure.+ Show more

Learning Objectives

• Define and distinguish between resilience and resistance in ecological systems.
• Explain how feedback loops, variability, and connectivity influence ecosystem resilience.
• Identify factors that can trigger regime shifts in ecosystems requiring long-term management strategies.+ Show more

Learning Objectives

• Explain the fundamental principles of the cell theory.
• Differentiate between unicellular and multicellular organisms.
• Identify the differences between prokaryotic and eukaryotic cells.+ Show more

Learning Objectives

• Differentiate between homogeneous and heterogeneous mixtures.
• Describe physical separation methods based on particle properties.
• Identify examples of mixtures and the principles behind their separation.

Learning Objectives

• Describe Earth’s concentric layers and explain how density, temperature, and pressure change with depth.
• Contrast lithosphere and asthenosphere based on their mechanical behavior and ability to flow.
• Explain how seismic waves and gravity data help infer Earth’s internal composition and structure.+ Show more

Learning Objectives

• Explain how nucleic acid sequence information can specify amino acid chains through genetic coding.
• Connect protein folding and 3D structure to how cells build organelles and carry out functions.
• Describe how specific cellular components (e.g., ribosomes, endoplasmic reticulum, mitochondria) relate to macromolecular structure and function.

Learning Objectives

• Understand the concepts of power and efficiency in energy transfer.
• Calculate power in various engineering scenarios.
• Compare real-world efficiency with theoretical models.+ Show more

Learning Objectives

• Understand the basic kinematic equations relating displacement, velocity, acceleration, and time.
• Apply the equations to scenarios involving free-fall and projectile motion.
• Interpret sign conventions and component-wise treatment in uniform acceleration problems.+ Show more

Learning Objectives

• Explain the semi-conservative model of DNA replication and how daughter DNA molecules are formed
• Describe the main roles of helicase, primase, DNA polymerase, and ligase during replication
• Differentiate leading-strand and lagging-strand synthesis, including Okazaki fragments+ Show more

Learning Objectives

• Explain how Earth’s axial tilt and its orbit around the Sun change the angle of sunlight
• Describe how these changes affect day length and solar heating at different latitudes
• Analyze how repeating Earth–Sun motions help determine seasonal timing

Learning Objectives

• Understand the stages and types of ecological succession, including primary and secondary succession.
• Identify key species traits and environmental factors influencing succession trajectories.
• Explain how modeling succession helps predict ecosystem responses to disturbances and environmental change.+ Show more

Learning Objectives

• Understand the main processes involved in biogeochemical cycles such as carbon, nitrogen, and phosphorus.
• Identify the reservoirs and fluxes of key elements within Earth's systems.
• Explain how factors like climate change and land use impact biogeochemical cycle dynamics.+ Show more

Learning Objectives

• Understand the processes involved in nutrient cycling such as nitrogen fixation, assimilation, mineralization, and denitrification.
• Explain how physical transport and human activities influence nutrient availability and cycling rates.
• Assess the impact of excess nutrient loading on aquatic ecosystems, including eutrophication and species composition changes.+ Show more

Learning Objectives

• Understand the concepts of power as energy transfer rate and work per unit time.
• Differentiate between average and instantaneous power and their units.
• Explain mechanical efficiency as useful output energy relative to input energy.+ Show more

Learning Objectives

• Explain the differences between static and kinetic friction and how surface properties affect them.
• Describe the role of fluid drag and how it depends on velocity, surface area, and medium density.
• Apply quantitative relations involving μ coefficients and drag dependencies to real-world motion scenarios.+ Show more

Learning Objectives

• Interpret position–time and velocity–time graphs in various motion scenarios.
• Understand how slopes of graphs relate to physical quantities like velocity and acceleration.
• Calculate displacement from areas under velocity–time graphs.+ Show more

Learning Objectives

• Understand the representation of forces as vectors including magnitude and direction.
• Learn to decompose forces into components and compute resultant forces graphically and analytically.
• Apply vector addition to force interactions in two-dimensional contexts such as inclined planes and angled cables.+ Show more

Learning Objectives

• Distinguish between contact and non-contact forces with examples.
• Identify the magnitude, direction, and point of application in force interactions.
• Understand action-reaction force pairs and their roles in physical interactions.+ Show more

Learning Objectives

• Understand the concept of work as the dot product of force and displacement, including the role of the cosine of the angle between them.
• Calculate work done by constant forces at an angle, including lifting against gravity and pulling objects.
• Compare methods for calculating work when forces vary, including using the area under force–distance curves in common approximations.+ Show more

Learning Objectives

• Identify and describe physical and chemical properties of common rock-forming minerals.
• Understand how mineral properties relate to their formation environment and stability.
• Recognize economic significance of minerals and distinguish ore minerals from gangue.

Learning Objectives

• Understand the relationship between mass and acceleration under a given net force.
• Distinguish between inertial mass and gravitational effects in responses to forces.
• Analyze how changes in mass affect acceleration in practical scenarios.+ Show more

Learning Objectives

• Explain how the cell membrane controls exchange between a cell and its environment
• Identify major organelles and describe how their structures relate to their functions
• Use models to compare cell structures and understand relative sizes and interactions