Grade 7 Worksheets

Learning Objectives

• Explain how atomic number relates to the number of protons and electrons in common cases.
• Compare particle, ball-and-stick, and lattice representations of atoms in molecules and extended structures.
• Use chemical formula notation to describe how bonding patterns affect properties such as melting point and conductivity.

Learning Objectives

• Explain how carrying capacity and resource availability affect population size and growth rate.
• Interpret logistic growth ideas using examples such as limited food, water, and shelter.
• Connect birth, death, immigration, and emigration to population change in ecosystems.+ Show more

Learning Objectives

• Explain how evidence such as seafloor structures, earthquakes, and volcanoes supports the idea of moving tectonic plates.
• Use fossil distributions and continental margin features to infer past continental positions.
• Describe how magnetic striping and mountain building relate to plate motion and paleogeographic reconstructions.

Learning Objectives

• Explain how kinetic energy depends on mass and speed
• Interpret proportional patterns in kinetic energy graphs
• Relate stored potential energy to future motion through energy conversion

Learning Objectives

• Explain how physical and biological disturbances can change population sizes and community composition.
• Describe mechanisms of resilience, resistance, and ecological succession during ecosystem recovery.
• Interpret observations and longitudinal data to connect specific abiotic or biotic changes to population trends.+ Show more

Learning Objectives

• Explain how potential energy depends on an object’s position or arrangement in a system
• Compare gravitational, elastic, and magnetic potential energy using real-world examples
• Describe how changes in configuration can transform stored energy into motion or work

Learning Objectives

• Explain equilibrium as the condition where the net force is zero.
• Differentiate static equilibrium from dynamic equilibrium using acceleration and motion.
• Identify examples of balanced forces, including normal and gravitational forces and tension.+ Show more

Learning Objectives

• Interpret balanced chemical equations to determine the mole-to-mole relationships between reactants and products.
• Use ratio reasoning and unit consistency to convert between amounts of substances during chemical transformations.
• Scale reactant and product quantities proportionally and predict outcomes using conservation of matter.

Learning Objectives

• Explain how scientists use environmental indicators to monitor human impacts on land, water, and air.
• Describe how remote sensing and land-cover data can reveal changes over time.
• Evaluate mitigation strategies and trade-offs between economic needs and long-term ecosystem resilience.

Learning Objectives

• Explain how microscopy provides evidence that organisms are made of discrete cells.
• Differentiate unicellular and multicellular organization using examples such as protists and onion epidermis.
• Identify major cell boundaries (plasma membrane and cell wall) and describe how they appear in images.+ Show more

Learning Objectives

• Explain how synthetic materials can be produced from natural resources by outlining key steps such as feedstock selection, polymerization, and refining.
• Describe how chemical composition changes during processing and how those changes affect material properties like strength, flexibility, and durability.
• Compare examples (polyethylene, PET, nylon, and metals from ores) and discuss trade-offs involving recyclability and environmental impact.

Learning Objectives

• Analyze historical and instrumental data to identify patterns in frequency, magnitude, and geographic distribution of natural hazards.
• Use ideas like hazard maps and recurrence intervals to assess risk and compare short-term event dynamics with long-term trends.
• Explain how natural hazards can create cascading impacts on infrastructure, ecosystems, and communities in coastal or floodplain areas.

Learning Objectives

• Explain how weathering, erosion, transport, and deposition change Earth’s surface over short and long timescales.
• Differentiate mechanical and chemical weathering and identify their likely effects on landforms and soils.
• Describe how water, wind, ice, and gravity contribute to shaping features such as canyons, coastal cliffs, moraines, and deltas.

Learning Objectives

• Explain how atoms are conserved while matter cycles through organisms during digestion, biosynthesis, and respiration
• Trace the flow of carbon and nitrogen from food into cellular biomolecules and then into waste or the environment
• Describe how biochemical pathways build and break down macromolecules to recycle matter

Learning Objectives

• Explain how devices convert energy from one form to another using energy transfer and conservation ideas
• Describe unavoidable thermal (heat) losses and relate them to efficiency in real systems
• Complete and interpret simple energy accounting across a transformation sequence

Learning Objectives

• Explain how gravitational attraction influences motion in orbits and other curved paths
• Use relationships involving centripetal effects, orbital velocity, and orbital periods to describe motion
• Interpret observational evidence such as orbital trajectories and patterns to support ideas about gravity and stability+ Show more

Learning Objectives

• Explain how momentum changes when objects collide using the conservation of momentum idea
• Describe how forces act during collisions through Newton’s third law (equal and opposite reactions)
• Distinguish elastic from inelastic collisions and predict likely outcomes

Learning Objectives

• Explain how plate tectonics, weathering, sedimentation, and biological activity help form uneven distributions of Earth resources.
• Interpret geologic maps and cross sections to connect processes and time scales to mineral, fossil fuel, and groundwater locations.
• Describe how extracting resources can affect ecosystems and regional sustainability, including differences between renewable and nonrenewable resources.

Learning Objectives

• Use models to predict how alternative design solutions will behave.
• Compare solutions using consistent metrics such as performance, cost, durability, and manufacturability.
• Identify and quantify trade-offs between competing design choices.+ Show more

Learning Objectives

• Explain how unequal solar heating and Earth’s rotation drive global atmospheric circulation (Hadley, Ferrel, and polar cells).
• Describe how the Coriolis effect shapes prevailing winds and helps form jet streams.
• Connect large-scale ocean circulation (gyres and major currents like the Gulf Stream) to regional climate patterns.

Learning Objectives

• Explain how allele frequencies can change over generations using quantitative models.
• Use probability and simple genotype frequency ideas to predict inheritance outcomes.
• Interpret basic Hardy-Weinberg expectations and compare them to observed trait frequencies.+ Show more

Learning Objectives

• Compare distances and sizes in space using astronomical units, planetary diameters, and light-years
• Interpret orders of magnitude and explain how scale affects what we can observe
• Use scaled representations to reason about relative positions of the Sun, planets, and nearby stars

Learning Objectives

• Explain how reproductive isolation and geographic separation can lead to speciation.
• Describe how polyploidy and adaptive radiation can create new species.
• Interpret biogeographic and diversification patterns to understand biodiversity over time.

Learning Objectives

• Explain how photosynthesis transforms light energy into chemical energy stored in sugar molecules
• Describe how cellular respiration converts chemical energy in food into ATP that cells can use
• Compare energy use in active versus resting tissues and interpret how limits affect energy transformation rates+ Show more

Learning Objectives

• Describe how pharyngeal pouches and limb buds develop early in vertebrates and why they can be evolutionarily informative
• Compare embryonic development across taxa using evidence from developmental timing and patterning
• Explain how conserved developmental stages can support reconstruction of phylogenetic relationships

Learning Objectives

• Explain how uneven solar heating and ocean surface conditions influence atmospheric circulation and regional climate.
• Use temperature gradients, wind vectors, sea-surface temperature, and precipitation records to interpret climate patterns such as El Niño and monsoons.
• Describe how topography and ocean currents can change local temperature, rainfall, and prevailing wind belts.+ Show more

Learning Objectives

• Explain how population growth and per-capita consumption increase demand for water, energy, land, and raw materials
• Analyze how increased demand affects ecosystems, biodiversity, and resource cycles
• Use cause-and-effect reasoning to connect urbanization, waste production, and environmental impacts

Learning Objectives

• Identify observable indicators that a chemical reaction has occurred.
• Explain how gas production, precipitate formation, color change, and temperature change serve as evidence of new substances.
• Distinguish chemical changes from reversible physical changes using conservation of mass in sealed systems.

Learning Objectives

• Distinguish physical properties from chemical properties using measurable and observable descriptors.
• Interpret property data (e.g., density, melting point, solubility, conductivity, reactivity, flammability) to support material identification.
• Use quantitative and qualitative evidence to predict how materials respond to temperature changes and chemical contact.

Learning Objectives

• Explain how homologous and analogous structures provide evidence for evolution
• Use comparative anatomical features (limb bones, skull shape, vestigial organs) to infer evolutionary relationships
• Connect morphological comparisons with basic genetics and paleontology evidence to support phylogenetic ideas

Learning Objectives

• Use energy bookkeeping to track how motion energy changes when energy is transferred into or out of an object.
• Explain qualitatively how braking, collisions, and bouncing involve redistribution of energy, including transfers to thermal and sound energy.
• Calculate and interpret simple quantitative energy changes related to speed and energy transfer.

Learning Objectives

• Explain how phenotype can result from interactions between genes and environmental factors.
• Identify examples where nutrition, ultraviolet light, or temperature influence visible traits.
• Distinguish inherited genetic contributions from environmental modulation of traits.

Learning Objectives

• Analyze patterns in the fossil record, including diversity, extinction events, and morphological change over geologic time
• Explain how stratigraphy and index fossils support correlation and inferences about ancestry
• Describe how transitional fossils provide evidence for evolutionary continuity

Learning Objectives

• Explain how heritable variation and environmental pressures can change trait frequencies in populations over generations.
• Describe how differential survival and reproduction lead to adaptation.
• Use examples (such as antibiotic resistance and island finch beak variation) to interpret natural selection.

Learning Objectives

• Explain how DNA forms genes and how genes influence observable traits.
• Describe how DNA is organized into chromosomes inside cells.
• Model how chromosomes are segregated during gamete formation and recombined at fertilization.

Learning Objectives

• Define a design problem using clear criteria for success and measurable constraints.
• Translate real-world needs (societal, environmental, and safety) into quantitative targets and acceptable limits.
• Distinguish between criteria (what success looks like) and constraints (what limits the design).+ Show more

Learning Objectives

• Explain how gravity, electric, and magnetic forces can act at a distance without direct contact.
• Describe the qualitative relationship between gravity and mass and between gravity and distance.
• Identify when electric and magnetic forces can be attractive or repulsive using real-world examples.

Learning Objectives

• Explain how the circulatory, respiratory, digestive, and nervous systems interact to support homeostasis in multicellular animals
• Describe how oxygen and nutrients move through organ systems and how those movements affect body tissues
• Use examples to compare how transport systems work in humans and plants+ Show more

Learning Objectives

• Explain how predation, competition, parasitism, mutualism, and commensalism affect populations in terrestrial and aquatic ecosystems.
• Use food webs and trophic diagrams to describe direct and indirect (cascading) effects of species interactions.
• Interpret evidence-based claims about interaction strength changes, including examples of predator–prey cycles and invasive species.+ Show more

Learning Objectives

• Identify different types of symbiotic relationships in ecosystems.
• Describe mutualism, commensalism, and parasitism using regional examples.
• Understand ecological impacts of these relationships on community dynamics.

Learning Objectives

• Define contact and non-contact forces.
• Explain how net force influences the acceleration of an object.
• Identify examples of push and pull forces in everyday life.

Learning Objectives

• Explain how the kinetic motion of particles affects temperature.
• Describe the differences between heat and temperature.
• Identify the methods of thermal transfer: conduction, convection, radiation.+ Show more

Learning Objectives

• Define what simple machines are and describe their basic functions.
• Identify different types of simple machines including lever, pulley, wedge, screw, inclined plane, and wheel-and-axle.
• Explain the concept of mechanical advantage and how it is achieved using simple machines.+ Show more

Learning Objectives

• Understand the criteria used to evaluate species' conservation status.
• Interpret evidence related to species population trends, threats, and recovery potential.
• Analyze regional examples of conservation status assessments.+ Show more

Learning Objectives

• Understand the concept of radiant energy transfer through electromagnetic waves
• Identify factors affecting radiative heating and cooling
• Recognize how solar angles and surface properties influence local microclimates

Learning Objectives

• Define what solution concentration means in chemistry.
• Identify different measures of concentration such as mass percent and grams per litre.
• Understand how concentration affects physical properties like boiling point and freezing point.+ Show more

Learning Objectives

• Understand the importance of oral histories in ecological knowledge.
• Identify how traditional place-based knowledge informs environmental understanding.
• Recognize examples of stewardship practices in Indigenous communities.

Learning Objectives

• Identify particles and describe their arrangement in solids, liquids, and gases.
• Explain how particle motion affects the state of matter.
• Relate microscopic particle behavior to macroscopic observations such as diffusion, condensation, and evaporation.