Grade 8 Science Worksheets

Learning Objectives

• Describe how matter cycles between living organisms and the abiotic environment.
• Explain processes such as photosynthesis, respiration, and decomposition in the cycling of matter.
• Trace atoms like carbon and water through ecosystems involving producers, consumers, and decomposers.+ Show more

Learning Objectives

• Model a chemical reaction using particle diagrams that show how atoms and particle counts change before and after the reaction.
• Use energy models to explain whether a reaction releases or absorbs thermal energy and what that implies about particle motion.
• Connect observable evidence (color change, gas formation, temperature change) to particle-level and energy-level changes.

Learning Objectives

• Distinguish between mass as an intrinsic property of matter and weight as a gravitational force.
• Explain how mass and weight relate through gravitational acceleration.
• Apply regional examples like haul truck load specifications and agricultural dosing to understand mass and weight concepts.+ Show more

Learning Objectives

• Explain how natural selection depends on variation, heritability, and environmental pressure.
• Use the idea of differential survival and reproduction to predict how trait frequencies can change over generations.
• Describe how adaptations can become more common and how this can lead to divergence in separated populations.

Learning Objectives

• Understand what scientific models are and how they are used in engineering.
• Recognize different types of models and their purposes.
• Learn how measurements from physical prototypes can lead to model adjustments.+ Show more

Learning Objectives

• Differentiate between mixtures and compounds based on their properties.
• Identify methods to separate mixtures and compounds.
• Explain the formation of compounds through chemical bonds.+ Show more

Learning Objectives

• Distinguish heterogeneous and homogeneous mixtures using observable properties
• Explain how solutions form, including the roles of solute, solvent, and solubility
• Describe saturation and predict what happens when more solute is added to a solution+ Show more

Learning Objectives

• Understand the principles of osmosis and water potential in cellular contexts.
• Differentiate between hypotonic, isotonic, and hypertonic environments and their effects on cells.
• Describe mechanisms such as turgor pressure and volume control that cells use to maintain osmotic balance.+ Show more

Learning Objectives

• Identify testable claims by linking a measurable factor to an observable outcome
• Write or evaluate hypotheses using clear variables and realistic expectations
• Determine what data patterns would support or weaken a hypothesis

Learning Objectives

• Define pressure as force per unit area using appropriate SI terminology
• Calculate pressure from given force and contact area
• Convert pressure values between pascals and kilopascals+ Show more

Learning Objectives

• Explain how composition and differentiation can lead to different densities across solar system bodies.
• Use observational evidence (craters, volcanism, rings/moons) to support claims about heat history and resurfacing.
• Describe how orbital patterns reflect gravitational interactions during early solar system evolution.

Learning Objectives

• Explain how energy can move between objects and change form during physical processes.
• Use examples like friction and household devices to describe transformations between mechanical, electrical, thermal, and light energy.
• Apply the idea of energy conservation by tracking energy changes rather than energy disappearing.

Learning Objectives

• Explain how reaction time and braking deceleration determine total stopping distance
• Describe how tire-road friction and braking force affect how quickly a vehicle slows
• Use the concepts of anti-lock braking systems and brake fade to predict changes in stopping distance

Learning Objectives

• Explain the concept of relative motion and how observed speeds depend on the reference frame.
• Apply proportional relationships among speed, distance, and time within different frames of reference.
• Analyze simple scenarios such as two walkers moving toward each other or a boat crossing a stream to understand how relative speeds are affected by different frames.

Learning Objectives

• Understand the principles of conservation of momentum in collisions.
• Differentiate between elastic and inelastic collisions.
• Apply the concepts of impulse and velocity change to real-world collision scenarios.

Learning Objectives

• Identify and describe measurable properties of matter, including density, solubility, melting point, boiling point, and conductivity.
• Compare materials using quantitative physical characteristics (mass, volume, and temperature).
• Explain how physical properties help classify matter and support separation techniques.

Learning Objectives

• Explain how criteria and constraints are used to compare alternative solutions.
• Identify tradeoffs when improving one performance goal causes drawbacks in another.
• Justify why a chosen design is optimal for a given situation.

Learning Objectives

• Explain how energy changes form during physical processes using the terms mechanical, thermal, electrical, and light energy.
• Describe how friction can transform mechanical energy into thermal energy and how this shows up as warming.
• Track energy as it transfers between objects or systems and identify that energy does not disappear.+ Show more

Learning Objectives

• Define and explain the concepts of viscosity, including dynamic and kinematic viscosity.
• Differentiate between low-viscosity and high-viscosity fluids such as water and oil.
• Describe how viscosity affects flow rates in pipes and relate it to real-world applications.+ Show more

Learning Objectives

• Define power as the rate of doing work.
• Explain the relationship between torque, rotational speed, and power.
• Apply SI units of watts to measure mechanical power.+ Show more

Learning Objectives

• Understand how to interpret distance-time graphs to analyze motion.
• Identify different segments of a distance-time graph indicating rest, constant speed, or acceleration.
• Calculate average speed between two points on a graph.+ Show more

Learning Objectives

• Compare endothermic and exothermic reactions using energy flow and temperature evidence
• Explain energy changes using particle motion and bonding rearrangements rather than energy from outside
• Interpret models of exothermic and endothermic reactions to predict whether the surroundings warm or cool

Learning Objectives

• Explain how chemical reactions rearrange atoms to form new substances.
• Use a particle model to describe changes in bonding and the number of each substance’s particles after a reaction.
• Connect observable evidence (color, gas, temperature change) to particle-level and energy-level changes using reaction models.+ Show more

Learning Objectives

• Compare hypothesis-driven, descriptive, and correlational inquiry models and identify what each can (and cannot) claim.
• Use boundary conditions and underlying assumptions to evaluate when a scientific model is likely to be valid.
• Connect conceptual and mathematical representations to generate testable predictions from models.+ Show more

Learning Objectives

• Explain how forces can be push or pull interactions that change motion
• Describe the difference between balanced and unbalanced forces using net force
• Predict how velocity changes when forces act in the same or opposite directions+ Show more

Learning Objectives

• Explain energy conservation using the idea of a system and its surroundings.
• Describe how energy can change forms during energy transfers without changing total energy.
• Predict how mechanical energy changes when friction and height are involved.+ Show more

Learning Objectives

• Explain the relationship between DNA sequences and protein synthesis.
• Describe gene structure, transcription, and translation processes.
• Analyze how mutations affect amino acid sequences and phenotypes.+ Show more

Learning Objectives

• Understand the different types of measurement errors and their sources.
• Identify ways to quantify and reduce systematic and random errors.
• Apply error analysis techniques such as significant figures, error margins, and propagation methods.+ Show more

Learning Objectives

• Identify independent, dependent, and controlled variables in scientific investigations.
• Understand how to establish fair tests by selecting appropriate controls.
• Recognize procedural constraints and instrumentation factors affecting reproducibility.+ Show more

Learning Objectives

• Describe the roles of producers, consumers, and decomposers in an ecosystem.
• Identify abiotic factors such as sunlight, water, and temperature that influence ecosystems.
• Explain how interactions between biotic and abiotic elements shape ecological communities.+ Show more

Learning Objectives

• Identify features of a testable science question that can be answered using measurable or observable evidence
• Distinguish observations, claims, and assumptions in scientific statements
• Rewrite vague questions into clear, testable questions using variables and defined conditions+ Show more

Learning Objectives

• Understand how energy changes form during physical processes.
• Identify examples of energy transformation in everyday life.
• Explain the conservation of energy during transformations.+ Show more

Learning Objectives

• Explain how genetic, species, and ecosystem diversity support ecosystem functions and services.
• Describe conservation strategies such as habitat connectivity, protected areas, and restoration and how they affect biodiversity outcomes.
• Evaluate trade-offs and adaptive management decisions using real-world examples.

Learning Objectives

• Understand how bonds are broken and formed during chemical reactions and how energy changes are involved.
• Differentiate between endothermic and exothermic reactions based on energy profiles.
• Explain how bond enthalpies relate to temperature changes observed during reactions.+ Show more

Learning Objectives

• Explain how free-body diagrams represent all forces acting on an object.
• Identify normal force, tension, friction, and gravitational force on simple contact and non-contact systems.
• Distinguish balanced from unbalanced net force and relate each to constant velocity versus acceleration.

Learning Objectives

• Interpret slope on distance–time and velocity–time graphs to determine speed and acceleration.
• Use the area under a velocity–time graph to determine displacement.
• Compare motion profiles qualitatively using graph shape (straight lines vs curves).

Learning Objectives

• Differentiate a claim from evidence and reasoning in a scientific explanation.
• Use evidence to justify a mechanism instead of replacing the data with opinions.
• Compare alternative explanations by stating what the current evidence supports and rules out, and what new evidence could discriminate.+ Show more

Learning Objectives

• Understand different methods used for monitoring ecosystems and water resources.
• Identify indicators of ecological health and their significance.
• Analyze measurement protocols and thresholds for environmental mitigation.+ Show more

Learning Objectives

• Explain the principles of water potential and tonicity in cells.
• Differentiate between hypotonic, isotonic, and hypertonic environments.
• Describe cellular responses to osmotic changes in plant and animal cells.+ Show more

Learning Objectives

• Identify observable evidence that indicates a chemical change versus a physical change.
• Classify common transformations using evidence such as gas formation, precipitate, temperature/colour change, or irreversible property change.
• Explain how atomic rearrangement relates to chemical change and why it cannot be reversed by simple physical methods.

Learning Objectives

• Explain Archimedes' principle and its relation to buoyant force.
• Identify how displaced fluid volume affects buoyancy.
• Differentiate between apparent weight in air and when submerged.+ Show more

Learning Objectives

• Explain how sustainable practices reduce impacts on Earth’s air, water, land, and ecosystems
• Identify key strategies for improving resource efficiency, reducing waste, and treating pollutants
• Use data-based reasoning to compare solutions that meet human needs while lowering harm+ Show more

Learning Objectives

• Define what design constraints and success criteria are in engineering.
• Identify constraints in various engineering problems.
• Explain how constraints influence the design process and outcome.

Learning Objectives

• Explain how evidence supports a claim using a mechanism that matches observed data
• Compare alternative explanations by stating what evidence supports, rules out, and would discriminate
• Describe uncertainty or limits when evidence is mixed rather than overstating certainty+ Show more

Learning Objectives

• Understand how mass influences the acceleration of objects under applied forces.
• Recognize the inverse relationship between mass and acceleration in Newton's second law.
• Compare the responses of objects with different masses when pushed with the same force.

Learning Objectives

• Explain how density and composition evidence support the idea of planetary differentiation
• Describe how orbital patterns and arrangement of bodies provide evidence for gravitational interactions during early solar system evolution
• Interpret crater, volcanic, ring, and moon evidence to infer impact history and resurfacing+ Show more

Learning Objectives

• Explain how gravitational attraction depends on both mass and distance
• Describe gravity as a force that acts at a distance and affects motion
• Use evidence from real-world examples to make claims about changes in gravitational strength

Learning Objectives

• Explain how a pendulum transfers energy between gravitational potential energy and kinetic energy during a swing.
• Describe how friction and air resistance affect mechanical energy in real pendulums.
• Relate amplitude, mass, and length to changes in energy distribution and the pendulum’s period.