Grade 7 Science Worksheets

Learning Objectives

• Understand core concepts of optimization in design, including key performance metrics and constraints.
• Identify different methods such as parameter variation and sensitivity analysis used to improve design outcomes.
• Evaluate trade-offs among strength, cost, durability, and sustainability in engineering decisions.+ Show more

Learning Objectives

• Explain the process of convective heat transfer in fluids due to buoyancy and density variations.
• Identify and describe formation of circulation cells in air and water during convection.
• Relate convection phenomena to environmental examples like sea breezes, thermals, and lake overturning.+ Show more

Learning Objectives

• Identify and describe the three primary modes of thermal energy transfer: conduction, convection, and radiation.
• Differentiate between the media and mechanisms involved in each mode of transfer.
• Use everyday examples to illustrate how heat moves through solids, fluids, and surfaces.+ Show more

Learning Objectives

• Understand the principles of simple distillation and its applications.
• Identify the factors affecting vapour pressure and boiling point differences in distillation.
• Explain the limitations of simple distillation with close-boiling mixtures and azeotropes.+ Show more

Learning Objectives

• Describe different patterns of species interactions such as predation, competition, parasitism, mutualism, and commensalism.
• Analyze how species interactions influence community structure and resource partitioning across terrestrial and aquatic ecosystems.
• Apply concepts of food webs and trophic diagrams to illustrate the effects of species interactions on ecosystems.+ Show more

Learning Objectives

• Explain the role of gravity in governing orbital motion within the solar system.
• Describe the mathematical relationships between mass, distance, and orbital velocity.
• Interpret observational evidence such as orbital trajectories and Keplerian patterns.+ Show more

Learning Objectives

• Understand the drivers of climate change including greenhouse gases, land-use change, and natural variability.
• Analyze evidence from temperature and CO₂ records to interpret climate trends.
• Assess impacts of climate change on sea level, precipitation, and agriculture.+ Show more

Learning Objectives

• Understand how temperature influences material properties such as expansion, contraction, phase changes, and viscosity.
• Explain the microscopic particle motion that causes macroscopic thermal effects.
• Identify practical applications and consequences of thermal effects in engineering and environmental contexts.+ Show more

Learning Objectives

• Understand the principles of density differences used in separation techniques.
• Identify how buoyant force, sedimentation, and centrifugal force are exploited in separation methods.
• Recognize examples like oil-water separation and blood fractionation that utilize density-driven processes.+ Show more

Learning Objectives

• Understand how energy is transferred through trophic levels in food webs and ecosystems.
• Describe the roles of producers, consumers, and decomposers in energy pyramids.
• Explain the processes of photosynthesis and cellular respiration as mechanisms for energy capture and release.+ Show more

Learning Objectives

• Explain the concepts of torque, fulcrum placement, and mechanical advantage in lever and pulley systems.
• Relate geometric principles to force multiplication in simple machines.
• Calculate input and output forces in lever and pulley configurations using basic arithmetic.+ Show more

Learning Objectives

• Understand microscopic particle motion and its relation to temperature and energy.
• Explain how particle speed distribution influences thermal states and pressure.
• Compare thermal energy among different materials and heat transfer mechanisms.+ Show more

Learning Objectives

• Define and explain the concept of equilibrium and balanced forces in structures.
• Distinguish between static and dynamic equilibrium in real-world applications.
• Identify graphical representations of force pairs and analyze their implications for safety and durability.+ Show more

Learning Objectives

• Describe human activities that contribute to environmental change, such as deforestation and pollution.
• Identify methods used to monitor and assess environmental impacts, including water-quality indicators and remote sensing.
• Explain mitigation strategies to reduce human impacts, such as policy measures and landscape restoration.+ Show more

Learning Objectives

• Understand how geologic processes influence the distribution of minerals, energy resources, and groundwater.
• Connect plate tectonics, sedimentation, and biological activity to resource locations.
• Analyze the impacts of resource extraction and consider sustainability factors.

Learning Objectives

• Understand the principles of hazard identification in laboratory and field settings.
• Analyze the different types of risks associated with chemical, biological, electrical, and mechanical hazards.
• Apply appropriate mitigation strategies and control measures to ensure safety and compliance.+ Show more

Learning Objectives

• Understand the principles of radiant transfer and how it conveys energy through electromagnetic waves.
• Identify factors influencing radiative heating and cooling of surfaces such as landscapes, buildings, and vehicles.
• Explain the roles of surface absorptivity and emissivity in local microclimate variations.+ Show more

Learning Objectives

• Describe different species interactions that influence ecological niches.
• Identify examples of mutualism, predation, competition, and parasitism in ecosystems.
• Explain how niche partitioning reduces competition among species.+ Show more

Learning Objectives

• Explain how empirical investigations and evidence support scientific explanations
• Evaluate how new data can refine, adjust, or replace scientific models
• Describe uncertainty as a normal part of scientific reasoning and communicate methods transparently+ Show more

Learning Objectives

• Explain how friction and other resistive forces oppose motion
• Describe how surface texture and air resistance affect how quickly objects slow down
• Connect resistive forces to changes in motion and energy during real-world examples

Learning Objectives

• Identify the major organelles within a cell and describe their functions.
• Compare the roles of different organelles such as nucleus, mitochondria, chloroplasts, and cell membranes.
• Explain how cellular structures relate to tissue and organ function in multicellular organisms.+ Show more

Learning Objectives

• Understand the mechanisms of natural selection and how they lead to adaptation in populations.
• Identify examples of natural selection in real-world scenarios such as antibiotic resistance and beak size variation.
• Analyze how environmental pressures influence evolutionary changes over generations.

Learning Objectives

• Describe the differences between homogeneous and heterogeneous mixtures.
• Identify examples of solutions, colloids, and suspensions based on particle size and separation behavior.
• Explain concepts like solubility, saturation, and colligative effects in mixtures.+ Show more

Learning Objectives

• Understand the factors that influence population size and distribution.
• Explain the patterns of exponential and logistic growth in populations.
• Identify the effects of limiting factors, disease, resources, and competition on populations.+ Show more

Learning Objectives

• Understand the key steps in the technological design process including problem definition, criteria and constraints, brainstorming, prototyping, evaluation, and optimization.
• Recognize examples of simple design prototypes such as mechanisms, water filtration models, and electrical circuits.
• Explain the importance of documentation methods like engineering notebooks and criteria matrices in supporting design decisions.+ Show more

Learning Objectives

• Explain how inherited traits are passed from parents to offspring using genetic information in reproductive cells
• Distinguish between inherited traits and environmental causes of differences among individuals
• Use predictable patterns to interpret offspring trait outcomes based on parental variation

Learning Objectives

• Explain how inclined planes change the effective force needed to move a load.
• Identify and describe force components parallel and perpendicular to a ramp.
• Calculate mechanical advantage using load and input force.+ Show more

Learning Objectives

• Classify bitumen separation steps as physical or chemical processes based on how substances change.
• Explain how density, particle size, temperature, and additives affect emulsions and dissolved organics.
• Use evidence from a process description to describe mixture behavior and expected product outcomes.

Learning Objectives

• Explain how tectonic activity, weathering, erosion, and deposition shape Earth’s surface.
• Distinguish between weathering and erosion using examples from real landscapes.
• Describe how deposition can change the location of sediments over time.+ Show more

Learning Objectives

• Explain the kinetic particle model using particle spacing, particle motion, and intermolecular forces.
• Predict how changes in temperature or applied force can affect diffusion, thermal expansion, density, pressure response, and compressibility.
• Connect micro-scale particle behavior to measurable macro-scale trends in experiments.

Learning Objectives

• Explain how planetesimals and accretion can lead to planets forming in the early solar system.
• Compare terrestrial planets and gas giants using properties such as size, surface or atmospheric characteristics, and moons.
• Describe how orbital eccentricity and phases relate to how we observe planets from Earth.+ Show more

Learning Objectives

• Explain how anthropogenic pollutants enter aquatic and terrestrial ecosystems through different exposure pathways.
• Describe how pollution can affect organism health and disrupt food web integrity.
• Connect pollutant sources (nutrient runoff, hydrocarbons, airborne deposition) to measurable ecological changes.

Learning Objectives

• Explain how push and pull forces can change an object’s state of motion.
• Distinguish between contact forces and non-contact forces with real-life examples.
• Describe the relationship between net force and resulting acceleration in qualitative terms.

Learning Objectives

• Define states of matter in terms of particle arrangement and particle motion (energy).
• Describe and distinguish phase changes: melting, freezing, vaporization, condensation, and sublimation.
• Explain how temperature and pressure affect phase transitions, including boiling point changes with atmospheric pressure.+ Show more

Learning Objectives

• Identify major eukaryotic cell organelles (nucleus, mitochondria, chloroplasts, and cell membrane) and describe their primary functions.
• Explain how organelle specialization supports cell survival and contributes to tissue and organ performance in multicellular organisms.
• Connect cellular energy capture in producers (photosynthesis) versus consumers (cellular respiration) to larger-scale ecological interactions.

Learning Objectives

• Explain how magma composition influences volcanic landforms (shield volcanoes vs. stratovolcanoes and deposits).
• Describe how eruption style affects what materials volcanoes produce (lava flows vs. pyroclastic deposits).
• Compare volcanic features formed at different tectonic settings, including subduction zones and hotspots.+ Show more

Learning Objectives

• Explain how human activities can alter ecosystems through habitat fragmentation, pollution, and invasive species.
• Describe how these changes can shift biodiversity, food-web structure (trophic structure), and ecosystem services over time.
• Evaluate mitigation and restoration strategies and predict how they may affect ecosystem recovery.

Learning Objectives

• Identify the three main tectonic boundary types and describe the motion between tectonic plates at each one
• Explain how boundary types create characteristic landforms, volcanic activity, and earthquake patterns
• Use evidence from descriptions to determine which boundary type is most likely occurring

Learning Objectives

• Explain that energy can change forms through energy transformations while total energy is conserved.
• Identify common energy forms (mechanical, chemical, electrical, thermal) and trace how they transform in real systems.
• Use energy transformation ideas to interpret examples such as hydroelectric power, wind turbines, and fuel combustion.

Learning Objectives

• Describe how simple machines change the size and/or direction of a force to make work easier.
• Explain mechanical advantage and connect it to the geometry of a machine.
• Identify and compare lever, pulley, wedge, screw, inclined plane, and wheel-and-axle in everyday contexts.+ Show more

Learning Objectives

• Compare mutualism, commensalism, and parasitism based on how both species are affected.
• Use ecological examples to explain how symbiosis influences population sizes and community structure.
• Describe how adaptations and coevolution can develop in species that interact over time.

Learning Objectives

• Define physical and chemical properties and explain how they help classify substances.
• Use quantitative observable criteria (e.g., density, solubility, hardness, conductivity, magnetism, flammability) to distinguish among elements, compounds, and mixtures.
• Apply property-based tests to identify practical examples of metals, dissolving substances, magnetic materials, and combustibility.

Learning Objectives

• Explain how tectonic stress and rock strength lead to sudden slip along faults during earthquakes.
• Compare normal, reverse, and strike-slip fault motion and connect each type to local stress regimes.
• Describe how earthquake waves travel through Earth and how depth, magnitude, and local geology affect intensity.+ Show more

Learning Objectives

• Explain how diffusion occurs due to the continual motion of particles moving from higher concentration to lower concentration
• Distinguish mixing from diffusion and describe how mixing can occur without particles stopping or changing into new substances
• Predict how temperature affects the rate of diffusion using the particle model

Learning Objectives

• Explain conservation of mass in a closed system using the idea that atoms are conserved during physical and chemical changes
• Predict whether measured mass before and after a reaction will be equal in a sealed container and justify the prediction
• Describe how reactants and products relate to mass in observable sealed-container situations

Learning Objectives

• Define solution concentration in terms of solute and solvent and explain what dilution means.
• Compare common concentration measures (mass percent and grams per litre) and identify units.
• Explain how concentration can affect physical properties such as freezing point and boiling point.+ Show more

Learning Objectives

• Analyze graphs (scatter plots, histograms, and line graphs) to describe patterns and relationships in data.
• Evaluate the strength of evidence by considering outliers and possible measurement uncertainty.
• Use summary statistics such as range and averages to compare data sets and support a claim.

Learning Objectives

• Describe how loads transfer through structural members using the idea of a load path.
• Differentiate dead loads and live loads and identify common examples of each.
• Recognize where tension, compression, and shear occur in beams, columns, trusses, and connections.+ Show more