Grade 7 Science Worksheets

Learning Objectives

• Explain how producers use light, carbon dioxide, and water to make sugars during photosynthesis
• Describe how photosynthesis stores energy in chemical bonds in biomass
• Connect photosynthesis to energy flow and matter cycling through food chains

Learning Objectives

• Explain how habitat protection, restoration, and species management reduce human impacts on ecosystems
• Use ideas from food webs, population dynamics, and abiotic factors to predict the effects of conservation actions
• Describe how monitoring and adaptive policies help conservation strategies improve over time

Learning Objectives

• Explain how producers, consumers, and decomposers are connected in a food web.
• Describe how energy flows through multiple pathways in a food web.
• Evaluate how species changes can cascade through a food web and affect ecosystem stability.+ Show more

Learning Objectives

• Explain how invasive species are introduced beyond their native range and why they can spread rapidly.
• Describe at least three ecological impacts of invasive species on food webs and nutrient cycles.
• Use cause-and-effect reasoning to predict how an ecosystem’s community composition may change over time.

Learning Objectives

• Explain how habitat fragmentation divides ecosystems and changes species interactions.
• Describe how edge effects alter microclimate and increase risks from predators and invasive species.
• Analyze how reduced connectivity affects dispersal, gene flow, and extinction risk.+ Show more

Learning Objectives

• Explain what a keystone species is and why its impact can be larger than its abundance
• Use food-web and energy-flow ideas to predict effects of removing a keystone species (trophic cascades)
• Identify examples of how predators or habitat engineers can maintain ecosystem stability and diversity+ Show more

Learning Objectives

• Explain how cells become tissues, tissues become organs, and organs work together in multicellular organisms.
• Identify how different tissue types (epithelial, muscle, nervous) support specific body functions.
• Describe how division of labor and cell specialization improve coordinated responses in the body.

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 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 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

• 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 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

• Describe hierarchical levels of biological organization from individual organisms to the biosphere.
• Explain how producers, consumers, and decomposers function in ecosystems and how energy flows through trophic levels.
• Analyze how structure at different organization levels supports ecosystem stability and resilience.+ Show more

Learning Objectives

• Evaluate scientific explanations by checking assumptions, alternative hypotheses, and the logic of conclusions.
• Distinguish correlation from causation and explain why strong evidence is not the same as strong claims.
• Assess the reliability of data and models by identifying methodological limitations and potential sources of bias.

Learning Objectives

• Explain how freshwater reservoirs and watersheds influence water availability using key hydrologic ideas.
• Describe how groundwater moves through aquifers and how porosity and permeability affect flow and recharge.
• Connect soil formation and mineral deposits to Earth processes and depositional or igneous settings.+ Show more

Learning Objectives

• Describe the layers of Earth (crust, mantle, outer core, inner core) and explain how their properties differ.
• Use seismic waves and mantle convection as evidence for Earth’s internal structure and plate motion.
• Explain how density, buoyancy, and heat transport relate to lithospheric behavior and geothermal gradients.+ Show more

Learning Objectives

• Explain how the rock cycle preserves evidence of Earth’s past surface changes in rocks and fossils.
• Use sedimentary stratigraphy, index fossils, and radiometric decay to determine relative and absolute ages.
• Interpret depositional environments, climates, and tectonic settings from rock and fossil assemblages.

Learning Objectives

• Explain how energy transfers through conduction, convection, and radiation
• Use temperature gradients to predict the direction and relative rate of heat flow
• Relate specific heat and phase changes to observable temperature and energy changes

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

• 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

• Analyze how technology can create short-term and long-term social, economic, and environmental impacts.
• Evaluate trade-offs using cost-benefit reasoning and identify unintended consequences.
• Explain how policy responses and ethical considerations can help mitigate harm from technological change.

Learning Objectives

• Define kinetic energy and potential energy using everyday examples.
• Explain how height and motion relate to stored energy and moving energy.
• Describe energy transfer between objects in a system using qualitative reasoning.

Learning Objectives

• Explain how net force is found by combining forces with vector direction using sign conventions in one dimension
• Interpret free-body diagrams to determine the direction and magnitude of net force for real systems (elevator, tug-of-war, cart on a ramp)
• Describe what it means for a system to be in equilibrium and predict motion when net force is zero or nonzero

Learning Objectives

• Explain how food availability and breeding needs can drive migration patterns.
• Identify timing cues and energetic demands that influence when animals migrate.
• Describe how migratory connectivity links ecosystems across habitats and provinces.

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

• 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

• 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

• Explain how static and kinetic friction oppose motion and relate to surface contact and normal force.
• Describe aerodynamic drag and how it affects objects moving through air, including speed-related effects.
• Predict qualitatively how changing friction or drag impacts acceleration and stopping distance in real-world situations.

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

• 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

• Explain how conservation of mass applies to closed-system reactions
• Use mass accounting to relate reactant masses to product masses
• Compare theoretical yields with measured yields using input-output mass data+ Show more

Learning Objectives

• Classify matter as a pure substance (element or compound), a mixture, or a solution based on composition and uniformity.
• Describe how measurable properties (like melting point) help distinguish pure substances from mixtures.
• Explain, with particle ideas, why solutions are homogeneous while mixtures can be separated by physical methods.+ Show more

Learning Objectives

• Explain what makes a pure substance different from a mixture in terms of uniform composition and characteristic properties.
• Differentiate elements and compounds and identify examples using chemical and physical evidence.
• Use fixed melting/boiling points and other properties to distinguish pure substances from substances with impurities.

Learning Objectives

• Explain how convection transports heat through fluid motion driven by density changes
• Compare natural convection and forced convection using real-world examples (atmosphere, reservoirs, HVAC)
• Use boundary layer and buoyancy ideas to describe flow patterns and seasonal temperature changes

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

• Identify major eukaryotic cell organelles and describe their main functions in transport, synthesis, and compartmentalization.
• Use models (2D diagrams and 3D representations) to explain how organelle structure supports cell processes.
• Compare features of plant and animal cells and relate differences to examples such as leaf mesophyll and muscle cells.

Learning Objectives

• Explain how patterns, variability, and measurement quality affect interpretations of test data.
• Describe what reliability means and how repeated measurements reduce uncertainty.
• Identify common sources of error (tool limits, inconsistent starting conditions, human reading errors) and how they change confidence in conclusions.+ Show more

Learning Objectives

• Explain how population growth and consumption increase demand for water, energy, land, and raw materials.
• Describe how increased waste and intensified agriculture or energy systems can disrupt ecosystems and resource cycles.
• Use quantitative reasoning to compare how different regions experience biodiversity loss, freshwater stress, and carbon emissions.

Learning Objectives

• Explain how unequal solar heating drives global atmospheric circulation (Hadley, Ferrel, and polar cells).
• Describe how Earth’s rotation and the Coriolis effect shape prevailing winds and jet streams.
• Connect ocean gyres and major currents (such as the Gulf Stream) to regional temperature and precipitation patterns.

Learning Objectives

• Describe the main processes of the water cycle: evaporation, condensation, precipitation, infiltration, runoff, and groundwater flow.
• Explain how solar energy and gravity drive water movement among the atmosphere, hydrosphere, and geosphere.
• Trace how water can travel through river basins, aquifers, springs, and oceans, including seasonal snowpack changes.

Learning Objectives

• Explain how Earth’s rotation and axial tilt create day-night cycles and seasonal changes.
• Model lunar phases using the Moon’s relative position to Earth and the Sun.
• Describe how alignment determines when solar and lunar eclipses occur.+ Show more

Learning Objectives

• Explain how phenotype can result from interactions between genotype and environmental factors.
• Identify real-world examples of environmental influences on traits (nutrition, UV exposure, temperature).
• Distinguish inherited genetic contributions from environmental modulation using evidence-based claims.

Learning Objectives

• Explain how changes in an object’s motion energy relate to energy transferred into or out of the object.
• Use energy accounting to track where kinetic energy goes during braking, collisions, and bouncing.
• Distinguish quantitative (numerical) and qualitative evidence when reasoning about energy transfers.

Learning Objectives

• Explain how different types of fossils (remains, traces, and imprints) provide evidence of past life and environments.
• Describe how fossil formation depends on preservation conditions such as rapid burial and sediment chemistry.
• Use fossil assemblages to infer whether an area was once aquatic, influenced by climate shifts, or altered by ecological change.+ 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

• Explain how environmental conditions (water, salts, freeze–thaw, and UV) lead to material degradation over time.
• Identify protective measures (coatings, cathodic protection, concrete cover, sealers, and detailing) that improve durability.
• Relate maintenance schedules and inspection intervals to expected lifespan and long-term structural reliability.

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

Learning Objectives

• Explain how temperature and solvent polarity affect how much solute dissolves in a solvent.
• Use solubility curves and saturation concepts to predict whether a solution will be unsaturated, saturated, or supersaturated.
• Describe how gas solubility changes with pressure and how that relates to everyday situations.+ Show more