Grade 7 Science Worksheets

Learning Objectives

• Explain how producers use light, carbon dioxide, and water to make sugars through photosynthesis.
• Describe how photosynthesis transfers matter (atoms) and energy through trophic levels.
• Interpret statements about photosynthesis using accurate scientific terminology.

Learning Objectives

• Explain how non-native (invasive) species can displace natives and change trophic relationships in an ecosystem.
• Describe common pathways for invasive species introduction and the factors that help them become established.
• Analyze ecological and economic consequences, including reduced native diversity, altered nutrient dynamics, and higher management costs.+ Show more

Learning Objectives

• Explain how predators, prey, and competitors influence access to resources and survival
• Describe how mutualism can increase resource availability and persistence for both species
• Connect population interactions to changes in survival and reproduction rates over time+ Show more

Learning Objectives

• Distinguish exponential growth from logistic growth using the idea of carrying capacity
• Explain how limiting factors (food, predation, disease, abiotic stress) affect population size
• Classify influences as density-dependent or density-independent+ Show more

Learning Objectives

• Explain how organisms function as interacting systems made of internal structures with specific roles
• Describe how structures help process inputs such as food, oxygen, and water into forms the organism can use
• Use evidence to connect structure and function in body systems (digestive, respiratory, and excretory)

Learning Objectives

• Explain how energy moves through trophic levels in a food web and food chain.
• Describe why only a fraction of energy becomes biomass at each step.
• Interpret how energy transfer efficiency affects the size of predator populations.+ Show more

Learning Objectives

• Explain the idea of reference conditions and why they guide ecological restoration goals.
• Differentiate active and passive restoration approaches and describe how each can support recovery.
• Identify key factors in restoration planning, including species selection, genetic considerations, and habitat connectivity.+ Show more

Learning Objectives

• Explain how design criteria describe what a solution must achieve in measurable ways.
• Differentiate design criteria from constraints and identify common examples of each.
• Use criteria and constraints to evaluate whether a design is acceptable, safe, and effective.

Learning Objectives

• Explain how evidence from tests and validated models supports evaluation of design solutions
• Interpret results by connecting performance to criteria under realistic conditions and potential failure modes
• Use tradeoffs to justify which design option best meets constraints and intended function

Learning Objectives

• Explain how the manufacturing process and microstructure of advanced materials influence strength, stiffness, and durability
• Compare advanced construction materials by considering cost, fabrication complexity, and performance trade-offs
• Describe how prefabrication and connections enable tall timber buildings and bridge retrofits using novel materials

Learning Objectives

• Define optimization metrics and explain how they help compare design options under constraints
• Identify tradeoffs in engineering/science problems using measurable criteria
• Use data and stated targets to justify whether a redesign improves overall performance

Learning Objectives

• Explain how engineering design thinking starts with defining a problem and writing clear specifications.
• Use criteria and constraints to evaluate ideas with measurable performance indicators and trade-off reasoning.
• Describe how feasibility criteria consider materials, cost, and environmental impacts during ideation and selection.

Learning Objectives

• Explain that adaptations are inherited traits that improve survival or reproduction in specific environments.
• Identify evidence for adaptation from population differences, fossil records, and documented environmental change.
• Use scientific reasoning to connect trait evidence to selection pressures in an environment.

Learning Objectives

• Explain how energy moves through trophic levels from primary producers to higher consumers
• Use quantitative ideas like trophic efficiency (e.g., ~10%) to predict how much energy is available at higher levels
• Describe how respiration and heat conversion limit energy availability and shape biomass pyramids+ Show more

Learning Objectives

• Explain how joints and connections maintain continuous load paths in structures.
• Compare bolted, welded, and bearing connections based on how they transfer forces.
• Describe shear, bearing, and slip at connections and why redundancy matters.+ Show more

Learning Objectives

• Explain how models use abstraction and assumptions to represent real-world systems.
• Identify key parameters, units, and variables used in simple numerical models.
• Describe how scientists validate models using empirical observations and evaluate when predictions are reliable.

Learning Objectives

• Describe the steps of the design process from requirements and constraints to generating and selecting concepts using criteria.
• Explain how performance objectives such as load capacity, stiffness, and serviceability guide engineering decisions.
• Use decision matrices, sketches, and trade-off reasoning to compare design alternatives and choose preferred solutions.

Learning Objectives

• Identify performance metrics, constraints, and trade-offs in an engineering design problem.
• Use parameter variation and sensitivity reasoning to improve a design within real-world limits.
• Evaluate options using basic cost–benefit reasoning and staged refinement.

Learning Objectives

• Identify and compare descriptive statistics such as mean, median, mode, and interquartile range (IQR)
• Explain how outliers affect measures of center and spread
• Use simple graphical ideas to interpret differences between data sets+ Show more

Learning Objectives

• Define a load path and identify the primary structural elements it connects (slabs/decks to beams/columns/trusses to foundations).
• Distinguish dead loads from live loads and explain why both matter for design.
• Identify how tension, compression, and shear commonly occur in structural members and why connections matter.+ Show more

Learning Objectives

• Explain how engineers map primary and secondary load paths to identify where gravity, lateral, and dynamic forces travel through a structural system.
• Describe how openings, re-entrant corners, and irregular geometry can redistribute forces and change load routes.
• Use the concepts of redundancy and alternative load paths to predict how structures can better prevent progressive collapse.

Learning Objectives

• Explain how density, strength (tensile and compressive), stiffness (modulus), ductility, toughness, and thermal expansion affect how materials behave under load and temperature changes.
• Use material-property reasoning to compare wood, steel, and reinforced concrete in terms of strength-to-weight, deformation, and typical failure modes.
• Connect beam and column performance to property selection for serviceability, durability, and anticipated loading conditions.

Learning Objectives

• Identify key parts of scientific inquiry, including testable questions, hypotheses, and variables.
• Use operational definitions and precise measurement to make results comparable across trials.
• Apply basic laboratory safety and ethical data-reporting practices during investigations.+ Show more

Learning Objectives

• Explain how tensile, compression, and bending tests describe material behavior under different forces.
• Identify non-destructive testing methods and describe what they detect or measure.
• Describe how anisotropy and strain localization can change material performance in timber and composite materials.+ Show more

Learning Objectives

• Explain how topology and form optimization can reduce material use while meeting structural performance requirements.
• Use performance-based criteria (strength, stiffness, and durability) to compare multiple design options quantitatively.
• Describe how life-cycle assessment and constructability constraints affect feasible optimized designs.+ Show more

Learning Objectives

• Compare scaled physical models, digital finite-element models, and laboratory load rigs for evaluating strength, stiffness, and failure modes.
• Explain how instrumentation such as strain gauges and displacement transducers measures structural response.
• Describe limitations of prototyping, especially scaling effects on joints and material heterogeneity.+ Show more

Learning Objectives

• Explain how abiotic factors (temperature, moisture, light, soil nutrients, and pH) affect where organisms can live.
• Describe how daily and seasonal abiotic changes can influence survival and population growth.
• Use the ideas of tolerance, carrying capacity, and resilience to predict how populations respond to extreme events.

Learning Objectives

• Explain how density differences and buoyancy drive convective heat transfer in fluids.
• Describe how convection produces circulation cells in air and water and identify real-world examples.
• Compare convection at different scales, from small boundary layers to large atmospheric circulation.+ Show more

Learning Objectives

• Identify independent, dependent, and controlled variables in real experimental scenarios.
• Create clear operational definitions for variables so measurements are consistent and replicable.
• Design fair tests by controlling confounding variables, using control groups, and planning replication.

Learning Objectives

• Explain how sound waves affect loudness and how distance changes perceived intensity.
• Describe how reflection and absorption of sound influence echoes and intensity.
• Connect amplitude and frequency to the brain’s perception of volume (loudness) and pitch.

Learning Objectives

• Explain how control methods reduce the influence of unrelated variables in an experiment.
• Identify control and comparison conditions and describe what must stay the same across groups.
• Use consistent timing, tool calibration, and standardized handling to support credible conclusions.

Learning Objectives

• Use data and observations to support a science claim with specific references.
• Explain why evidence implies a claim using appropriate relationships and units.
• Evaluate alternative explanations by comparing which evidence supports one explanation more strongly.

Learning Objectives

• Explain how evidence supports a scientific claim using a clear chain from observations to reasoning.
• Identify when an argument uses specific data values, graph features, or direct observations rather than unsupported statements.
• Revise scientific arguments to improve accuracy by addressing limitations and avoiding incorrect cause-and-effect claims.

Learning Objectives

• Explain how model evaluation compares predictions to evidence
• Identify common reasons a model may fail, such as incorrect assumptions or missing factors
• Describe how changing input parameters in a simulation can reveal which assumptions matter most+ Show more

Learning Objectives

• Explain how disturbances affect ecosystem structure and community relationships
• Describe how populations change during recovery and long-term shifts after disturbances
• Use evidence from population growth and decline to predict effects on ecosystem stability

Learning Objectives

• Explain how predator-prey interactions create population feedback loops in ecosystems.
• Use cause-and-effect reasoning to predict how changes in predator or prey populations affect other species.
• Identify the main idea of short ecological paragraphs and match them to appropriate captions.+ Show more

Learning Objectives

• Interpret position-time graphs by using slope to determine velocity and curvature to identify changing velocity
• Interpret velocity-time graphs by using slope to determine acceleration
• Use data tables with motion graphs to support conclusions about constant versus changing motion+ Show more

Learning Objectives

• Explain how structural adaptations help organisms carry out life processes such as respiration, protection, and water regulation
• Compare behavioral and morphological adaptations and describe how each can improve survival or reproduction
• Identify trade-offs in adaptations and explain how improving one function can limit another

Learning Objectives

• Identify common physical properties of matter and explain how they can be observed or measured
• Use physical property clues to distinguish between substances and to reason about separating mixtures
• Connect changes in behavior (heat response and dissolving) to specific physical properties

Learning Objectives

• Explain how vibrating objects produce sound waves in a medium
• Compare how frequency and amplitude affect pitch and loudness
• Describe how sound transmission depends on the presence of a medium

Learning Objectives

• Use consistent units, labels, and scales to organize measurement data in tables and graphs.
• Interpret graphs by describing trends, clusters, and comparisons between groups.
• Use relationships (direction and shape) to explain what the data suggest, not just single values.

Learning Objectives

• Explain how changes in temperature, rainfall, light, and habitat structure affect ecosystems and species survival.
• Describe how water quality and pollution can influence growth, reproduction, and mortality in organisms.
• Analyze how changes in one species can shift predator-prey, competition, and symbiotic relationships.

Learning Objectives

• Explain how energy transfers through a food web from producers to consumers.
• Describe how decomposition helps cycle matter (nutrients) within an ecosystem.
• Use evidence from food web relationships to predict how changes affect organisms.

Learning Objectives

• Explain how matter cycles through ecosystems using carbon, nitrogen, and phosphorus as examples
• Describe key processes that move nutrients between the air, organisms, soils, and water
• Connect nutrient availability to ecosystem productivity and limiting growth

Learning Objectives

• Explain how internal systems (transport, digestion, coordination) help organisms survive in their environments
• Describe how external structures (shells, spines, coloration, beaks) increase survival, feeding, and movement
• Use functional relationships to predict how a trait increases an organism’s chance of obtaining resources and reproducing

Learning Objectives

• Explain how scientists use long-term natural records and modern measurements to study climate change.
• Identify major climate drivers and describe how they can affect Earth’s energy balance and circulation.
• Compare evidence from ice cores, sediment layers, and tree rings to understand past temperature and precipitation patterns.

Learning Objectives

• Identify how the atmosphere, hydrosphere, geosphere, and biosphere interact as part of Earth’s system
• Explain how water, gases, and rock surfaces move between spheres and affect living things
• Use evidence to describe cause-and-effect relationships across Earth’s spheres

Learning Objectives

• Explain how plate tectonics can cause rapid geologic hazards such as earthquakes and volcanic eruptions
• Describe how weathering, erosion, and deposition reshape Earth’s surface over longer timescales
• Use evidence (fault features, lava flows, ash layers, sediment layers) to connect geologic processes to landforms+ Show more