Grade 7 Science Worksheets

Learning Objectives

• Explain how forces (pushes and pulls) can change an object's motion.
• Describe net force and how balanced vs. unbalanced forces affect acceleration, speed, and direction.
• Use everyday examples (bicycle, skateboard, friction) to predict changes in motion.

Learning Objectives

• Classify matter as an element, compound, or mixture based on composition and whether substances are chemically combined.
• Differentiate homogeneous and heterogeneous mixtures using the appearance of uniformity and visible parts.
• Predict how physical versus chemical changes could affect elements, compounds, and mixtures.

Learning Objectives

• Identify physical and chemical properties of matter using observable and measurable evidence.
• Explain how properties help classify substances under consistent conditions.
• Use everyday examples (ice, sand, iron) to connect properties to identification.

Learning Objectives

• Explain how empirical investigations (observations and measurements) help build scientific knowledge.
• Describe how evidence and peer community evaluation can support, refine, or replace scientific explanations.
• Use the idea of uncertainty to explain why scientific models can change when new data appear.

Learning Objectives

• Explain how physical and chemical properties help predict whether substances will react.
• Use evidence of chemical change (new substances, gas, color change, temperature change) to justify predictions.
• Identify likely reaction outcomes by applying trends in reactivity, acid–base behavior, flammability, and solubility.

Learning Objectives

• Explain how different types of biotic interactions affect survival and reproduction in an ecosystem
• Distinguish between mutualism, commensalism, parasitism, predation, and competition using examples
• Analyze how human actions can disrupt biotic relationships and change community structure

Learning Objectives

• Explain how cells communicate using chemical and electrical signals.
• Describe how receptor proteins and signal pathways can change metabolism and gene expression.
• Compare gap junctions and plasmodesmata as direct cell-to-cell connections.+ Show more

Learning Objectives

• Explain how magma is generated through partial melting of mantle or crust using decompression, volatile addition, and heat transfer.
• Compare intrusive and extrusive igneous rocks based on cooling rate, texture, and grain size.
• Describe how fractional crystallization and magma mixing can change magma composition and produce different rock types.+ Show more

Learning Objectives

• Describe Earth’s lithospheric plates and how they move on the ductile mantle.
• Compare divergent, convergent, and transform plate boundaries and predict associated geologic hazards.
• Use plate-motion ideas to explain large-scale patterns such as mountain chains and earthquake zones.

Learning Objectives

• Explain how births, deaths, immigration, and emigration change population size and distribution
• Describe carrying capacity and limiting factors and how they affect population growth
• Compare exponential and logistic growth patterns using real population examples+ Show more

Learning Objectives

• Identify independent, dependent, and controlled variables in an experiment and explain how each is used to test cause and effect.
• Write operational definitions and select appropriate control conditions for a fair and reproducible experiment.
• Plan data collection methods and sample sizes that support valid comparisons.+ Show more

Learning Objectives

• Distinguish quantitative observations from qualitative observations in everyday science situations.
• Choose appropriate metric units and tools for measuring length, mass, and volume.
• Develop a simple scientific inquiry plan that includes a question, hypothesis, measurements, and error awareness.

Learning Objectives

• Use metric prefixes and scientific notation to express measurements with appropriate units and precision.
• Calibrate common instruments (balance and graduated cylinder) and record measurements correctly using the correct number of significant digits.
• Use repeating trials to estimate variability and describe uncertainty in quantitative observations.+ Show more

Learning Objectives

• Identify independent, dependent, and controlled (constant) variables in a science investigation.
• Select appropriate control groups and explain why they are necessary for valid comparisons.
• Describe how replication, randomization, and blocking reduce confounding influences.+ Show more

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 space technology extends observation beyond Earth using telescopes, satellites, and spacecraft instruments
• Describe how propulsion, power, and human exploration hardware enable missions and support safe exploration
• Use examples of robotic missions and space stations to infer how data collection leads to scientific understanding

Learning Objectives

• Distinguish ionic from covalent bonding using particle-level evidence and bonding patterns.
• Relate bonding type to macroscopic properties such as melting point, solubility, and electrical conductivity.
• Construct simple binary ionic salts and molecular compounds using empirical formulas.

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 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

• Explain how free-body diagrams represent forces acting on an object using properly labeled arrows.
• Determine the net force magnitude and direction by combining perpendicular (and parallel) force components.
• Use conventions for inclined surfaces to correctly decompose gravity into parallel and perpendicular components.

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

• 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 how energy flows through trophic levels in an ecosystem.
• Describe how matter cycles through ecosystems via nutrient availability and decomposition.
• Predict how changes in resources can cause cascading effects in consumer populations.+ Show more

Learning Objectives

• Explain how matter and energy move through ecosystems in connected ways (producers, consumers, decomposers).
• Describe how food chains and food webs transfer energy across trophic levels.
• Predict why only a fraction of energy reaches higher trophic levels due to energy loss as heat.

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 limited resources affect survival and reproduction in ecosystems
• Describe how changes in food, water, space, and shelter can change population size over time
• Connect resource availability to why organisms do not maintain the same numbers in every habitat

Learning Objectives

• Explain how energy transfer affects particle motion and arrangement during phase changes.
• Identify which phase changes involve energy being absorbed or released (melting, freezing, vaporization, condensation, sublimation, deposition).
• Use temperature and pressure ideas to predict how a material may change state.+ Show more

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 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 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 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

• Define trophic efficiency and describe how energy transfer changes between trophic levels
• Explain why energy pyramids show fewer organisms and less energy at higher levels
• Use a trophic efficiency idea to interpret ecosystem energy flow and predator-prey patterns

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

• Describe the major parts of the cell membrane and how they are arranged.
• Explain how a phospholipid bilayer and membrane proteins create selective permeability.
• Connect the roles of cholesterol and carbohydrates to membrane stability and cell recognition.+ Show more

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