Grade 8 Science Worksheets

Learning Objectives

• Explain how materials, manufacturing, use, and end-of-life stages affect the overall environmental impact of a product
• Compare two design options by evaluating tradeoffs across the full life cycle rather than a single stage
• Identify evidence-based relationships between maintenance needs, energy use, waste, and pollution+ Show more

Learning Objectives

• Define predation and identify its role in ecosystems
• Understand the predator-prey relationship
• Analyze how predation affects population dynamics+ Show more

Learning Objectives

• Identify the main parts of the nervous system
• Describe the functions of neurons, axons, synapses, and myelin
• Understand how neurons transmit signals rapidly+ Show more

Learning Objectives

• Explain the concept of ecological succession and its stages.
• Distinguish between primary and secondary succession.
• Identify factors that influence successional pathways and landscape heterogeneity.+ Show more

Learning Objectives

• Understand the concept of linear momentum and how it is conserved in collisions.
• Differentiate between elastic and inelastic collisions using examples.
• Calculate post-collision velocities using momentum conservation principles in one-dimensional encounters.+ Show more

Learning Objectives

• Understand how particle models explain chemical reactions and energy changes.
• Identify observable evidence of chemical reactions such as color change, gas formation, and temperature change.
• Connect changes at the particle level to real-world evidence of reactions.+ Show more

Learning Objectives

• Understand how particle motion explains gas pressure and temperature.
• Connect microscopic particle behavior to macroscopic gas properties.
• Interpret how changes in temperature affect particle collisions and pressure.+ Show more

Learning Objectives

• Explain Bernoulli’s principle for incompressible flow using the relationship between fluid speed and pressure
• Use continuity and Bernoulli ideas to predict how pressure changes in a Venturi/constricted pipe
• Describe how pressure differences contribute to lift on airfoils

Learning Objectives

• Explain how hydrostatic pressure varies with depth and how this creates forces on submerged surfaces.
• Determine the net force direction and the location of the centre of pressure on a planar surface.
• Describe how pressure forces can create torque and how this affects dam and bulkhead design.+ Show more

Learning Objectives

• Differentiate physical weathering from chemical weathering and describe how each changes rocks.
• Explain how erosion transports material and how deposition forms sediment layers.
• Use cause-and-effect reasoning to connect climate, energy changes, and landscape changes over time.+ Show more

Learning Objectives

• Resolve the weight (gravity) of an object on an incline into perpendicular and parallel components.
• Explain how the parallel component and friction determine whether an object tends to slide down, stay at rest, or move up.
• Predict how slope steepness changes the size of the unbalanced force and the motion tendency.

Learning Objectives

• Explain how equal-and-opposite interaction forces during a collision relate to changes in momentum
• Use conservation of linear momentum to analyze pre- and post-collision motion for systems of two objects
• Distinguish elastic from inelastic collisions using kinetic energy and momentum+ Show more

Learning Objectives

• Explain how gravitational attraction depends on two object masses and the separation distance.
• Describe the inverse-square relationship between distance and gravitational force.
• Use gravitational ideas to predict everyday examples such as orbital motion and tidal effects.

Learning Objectives

• Identify structures involved in gas exchange in humans and plants
• Describe how the structure of alveoli and stomata facilitates gas exchange
• Explain the importance of surface area and thin surfaces in diffusion+ Show more

Learning Objectives

• Understand how particle motion, pressure, and temperature are interconnected in gases.
• Explain how changes in temperature can affect gas pressure and volume in closed systems.
• Describe real-world examples of gas behaviour, including atmospheric pressure variations and gas handling in agriculture.+ Show more

Learning Objectives

• Describe what a force is and its effect on objects.
• Identify different types of forces such as gravity, air resistance, and contact forces.
• Explain how forces combine as net forces to change motion.+ Show more

Learning Objectives

• Explain how balanced forces lead to zero net force and no change in motion
• Differentiate static equilibrium from dynamic equilibrium using real-life examples
• Determine whether a situation shows balanced or unbalanced forces by considering opposing forces

Learning Objectives

• Explain how ecosystem stability relates to resilience after disturbances
• Describe how changes in population size affect resources and community development
• Use evidence from a text to identify main ideas about ecosystem recovery+ Show more

Learning Objectives

• Understand the concept of ecosystem stability.
• Identify how ecosystems respond to disturbances.
• Recognize key interactions and processes in ecosystems.+ Show more

Learning Objectives

• Explain how to choose appropriate instrument ranges when measuring voltage, current, and resistance.
• Describe correct meter connection conventions for measuring current and voltage in a circuit.
• Predict how meter impedance (internal resistance) can affect measured current and resistance values.+ Show more

Learning Objectives

• Understand the concept of mechanical advantage and how it relates to force and distance in simple machine systems.
• Calculate ideal and real mechanical advantage using formulas for levers, pulleys, and inclined planes.
• Apply algebraic reasoning to compare different machine configurations and analyze efficiency.+ Show more

Learning Objectives

• Explain the concept of power as the rate of doing work.
• Relate power to SI units such as watts.
• Interpret how motor specifications, torque, and rotational speed influence power output.+ Show more

Learning Objectives

• Define mechanical efficiency as useful output energy divided by input energy and explain why efficiency is less than 100%.
• Identify major energy dissipation mechanisms in mechanical systems, including frictional heating, sound emission, and hysteresis.
• Describe how engineers measure and compare input and useful output power to quantify losses.+ Show more

Learning Objectives

• Understand various property changes such as pH, conductivity, density, and refractive index during chemical reactions.
• Identify how shifts in measurable properties indicate formation of new substances rather than physical mixing.
• Differentiate between physical changes and chemical transformations using property assessments.+ Show more

Learning Objectives

• Distinguish between short-term weather patterns and long-term climate patterns using data
• Interpret graphs and summary statistics for temperature, precipitation, and storm frequency
• Explain how variability differs from long-term change+ Show more

Learning Objectives

• Understand the differences between hypothesis-driven, descriptive, and correlational inquiry models.
• Analyze how scientific explanations are developed and refined using different inquiry approaches.
• Evaluate the strengths and limitations of various models in scientific research.+ Show more

Learning Objectives

• Understand the basic concepts of heat, temperature, and thermal energy transfer
• Learn about specific heat capacity and how it affects temperature change
• Relate energy transfer to microscopic particle kinetic energy+ Show more

Learning Objectives

• Explain how climate variability and change affect water systems, including precipitation, snowpack, evapotranspiration, and runoff timing
• Describe how changes in water availability influence floods, droughts, groundwater recharge, and reservoir storage
• Analyze how land-use change can interact with climate to affect regional hydrology and aquatic ecosystems+ Show more

Learning Objectives

• Explain how gear ratio affects torque and angular speed in simple and compound gear trains
• Calculate overall gear ratio for multi-stage spur gear systems and predict direction changes
• Identify the role of idler gears and describe how efficiency losses affect real gear performance

Learning Objectives

• Understand the different types of simple machines and their functions.
• Describe how simple machines modify force and distance.
• Identify everyday examples of simple machines and their configurations.+ Show more

Learning Objectives

• Explain how multiple lines of evidence support the idea that Earth’s tectonic plates have moved over geologic time.
• Identify how patterns of rock ages and types, along with seafloor features, help reconstruct past plate positions.
• Describe how fossils and minerals can match across distant regions because of former adjacency.

Learning Objectives

• Understand the role of gravity in governing motions within the solar system and galaxies
• Describe how gravitational attraction affects planetary and celestial motions
• Explain the concepts of orbital trajectories, centripetal acceleration, and the balance between inertia and gravity+ Show more

Learning Objectives

• Understand how body systems collaborate to maintain homeostasis.
• Identify functions of the circulatory, respiratory, digestive, nervous, and endocrine systems.
• Explain feedback mechanisms like insulin–glucagon signaling and thermoregulation.+ Show more

Learning Objectives

• Understand the mechanisms behind plate tectonics and how they shape landforms.
• Identify the processes of subduction, rifting, continental collision, and uplift.
• Interpret evidence from seafloor spreading, magnetic striping, and paleomagnetic records.+ Show more

Learning Objectives

• Understand the key components of the scientific method and inquiry.
• Identify how hypotheses, observations, and experiments support scientific claims.
• Recognize limitations of inference and the importance of peer critique in science.+ Show more

Learning Objectives

• Explain the role of gravity in governing motions within the solar system and galaxies.
• Describe the concepts of orbital trajectories, mutual gravitational attraction, and centripetal acceleration.
• Identify how gravitational balance produces elliptical orbits and orbital periods.+ Show more

Learning Objectives

• Understand various methods of data visualization, including graphs and tables.
• Interpret data trends, slopes, and intercepts in the context of motion and chemical rates.
• Construct and analyze different types of data representations with proper labels and legends.+ Show more

Learning Objectives

• Explain how tissues interact to form organs with specialized functions.
• Identify different tissue types involved in organ structure.
• Describe how tissue integration leads to organ-level properties.+ Show more

Learning Objectives

• Understand how gravity components act on objects on slopes.
• Analyze how slope steepness influences unbalanced forces and motion.
• Resolve force vectors into perpendicular and parallel components relative to an incline.+ Show more

Learning Objectives

• Describe the main organelles of cells and their functions.
• Compare prokaryotic and eukaryotic cell features.
• Differentiate between single-celled and multicellular organisms based on cellular organization.+ Show more

Learning Objectives

• Define engineering design success criteria and describe how they should be measurable.
• Identify common constraints in an engineering design problem and explain why they limit solutions.
• Write success criteria and constraints for a simple design challenge using precise language.

Learning Objectives

• Distinguish between design success criteria and engineering constraints in a design problem.
• Write success criteria as measurable outcomes and constraints as limits on solutions.
• Apply design parameters to evaluate and compare different solution ideas.

Learning Objectives

• Differentiate speed, velocity, and acceleration by identifying whether each is scalar or directional and what change rate it describes.
• Interpret motion from distance-time and velocity-time information, including changes in magnitude and direction.
• Calculate and compare kinematic quantities from tabulated distances and times in realistic contexts.

Learning Objectives

• Understand the key mechanisms driving microevolution and genetic variation.
• Interpret data related to trait distributions, fitness comparisons, and lineage divergence.
• Distinguish between natural selection, artificial selection, and speciation processes.+ Show more

Learning Objectives

• Explain the processes that lead to the formation of new species.
• Describe how geographic isolation contributes to speciation.
• Analyze fossil and genetic evidence for episodes of diversification and extinction.+ Show more

Learning Objectives

• Identify and interpret forces using free-body diagrams including normal, gravitational, frictional, and tension forces.
• Decompose forces on inclined planes into vector components.
• Calculate net force using vector components and understand its effect on motion.+ Show more

Learning Objectives

• Explain how particle motion, temperature, and energy transfer influence states of matter and phase changes.
• Describe the microscopic particle behaviors during melting, boiling, and condensation.
• Relate macroscopic measurements of temperature and heat flow to microscopic particle motion.+ Show more

Learning Objectives

• Interpret data patterns, frequency, and magnitude of natural hazards to assess risks.
• Explain how historical and instrumental records inform hazard forecasting and mitigation.
• Analyze different types of hazard data for planning and infrastructure design.+ Show more