Grade 7 Science Worksheets

Learning Objectives

• Understand the ecological mechanisms by which invasive species establish and spread.
• Identify the environmental and economic impacts of invasive species on native ecosystems.
• Analyze how invasive species alter food webs, nutrient cycles, and habitat structures.+ Show more

Learning Objectives

• Identify how different measurement tools have varying levels of resolution.
• Understand how repeated measurements estimate uncertainty.
• Learn how graphs and tables can display measurement ranges and error margins.+ Show more

Learning Objectives

• Explain how insulation reduces heat transfer by limiting conduction, convection, and radiation
• Compare common insulating materials (fiberglass, foam, and reflective foils) using thermal resistance ideas and practical thickness
• Describe how thermal bridging and air leakage increase heat loss and why continuous insulation helps

Learning Objectives

• Understand how mantle convection, slab pull, and ridge push influence plate motion.
• Describe the processes of mantle convection and their role in tectonic activity.
• Explain how slab pull and ridge push contribute to plate movement.+ Show more

Learning Objectives

• Differentiate ionic and covalent bonding using evidence from bonding structure and particle interactions.
• Relate bonding type to observable properties such as melting point, solubility, and electrical conductivity.
• Use empirical formulas to describe simple binary ionic salts and molecular compounds.

Learning Objectives

• Understand how relative motions of the Sun, Earth, and Moon produce observable cyclic patterns.
• Describe the causes of lunar phases, solar and lunar eclipses, and seasonal changes.
• Explain how diagrams of orbital geometry and axial tilt relate to day-night cycles and phases.+ Show more

Learning Objectives

• Explain how fitness relates to survival and reproduction in a particular environment
• Describe how environmental changes can change which heritable traits are favored by natural selection
• Connect fitness outcomes to variation within a population and changing selection pressures

Learning Objectives

• Explain how DNA is organized into chromosomes and contains genes.
• Describe how DNA sequence differences contribute to observable trait variation.
• Model chromosome separation during gamete formation.+ Show more

Learning Objectives

• Explain how unequal solar heating drives atmospheric circulation.
• Describe how Earth’s rotation affects prevailing winds.
• Identify Hadley, Ferrel, and polar circulation cells.+ Show more

Learning Objectives

• Identify how igneous, sedimentary, and metamorphic rocks form
• Explain how weathering and erosion move rock materials
• Describe how heat and pressure cause metamorphism+ Show more

Learning Objectives

• Distinguish physical properties from chemical properties
• Describe how density and melting point identify materials
• Explain how solubility and conductivity characterize materials+ Show more

Learning Objectives

• Calculate genotype probabilities from simple monohybrid crosses.
• Calculate phenotype probabilities using dominant and recessive alleles.
• Use Punnett squares to connect allele combinations with probability.+ Show more

Learning Objectives

• Compare strategies used to protect biodiversity and ecosystem services
• Identify benefits and trade-offs of habitat management strategies
• Evaluate ecological, economic, and social evidence+ Show more

Learning Objectives

• Identify conduction, convection, and radiation as energy-transfer mechanisms
• Explain how thermal energy moves between warmer and cooler regions
• Use temperature changes as evidence of thermal energy transfer+ Show more

Learning Objectives

• Identify physical and biological disturbances in ecosystems
• Explain resistance, resilience, and succession after disturbances
• Interpret population changes caused by ecosystem disturbances+ Show more

Learning Objectives

• Identify producers, consumers, and decomposers in food webs
• Explain how photosynthesis captures energy in ecosystems
• Describe how cellular respiration contributes to energy flow+ Show more

Learning Objectives

• Distinguish homologous, analogous, and vestigial structures
• Explain how anatomy provides evidence for evolutionary relationships
• Infer common ancestry from comparative anatomical patterns+ Show more

Learning Objectives

• Explain how heritable variation affects populations over generations
• Describe how environmental pressures influence trait frequencies
• Identify how survival and reproduction contribute to natural selection+ Show more

Learning Objectives

• Analyze test data to identify measurable design improvements
• Compare design results with performance requirements and constraints
• Explain how parameter changes affect design performance+ Show more

Learning Objectives

• Explain how motion energy changes during energy transfers
• Identify transfers from motion energy to thermal energy and sound
• Calculate simple changes in motion energy using joule values+ Show more

Learning Objectives

• Explain how geologic processes create uneven resource distributions
• Connect plate tectonics and sedimentation to resource formation
• Describe how weathering affects minerals, soil, and groundwater+ Show more

Learning Objectives

• Identify human activities that change land, water, and air
• Explain how environmental indicators reveal human impacts
• Interpret monitoring data to identify environmental changes+ Show more

Learning Objectives

• Explain how genes and environment interact to influence phenotype.
• Identify environmental factors that can influence observable traits.
• Distinguish inherited contributions from environmental influences on phenotype.+ Show more

Learning Objectives

• Explain equilibrium using the vector sum of forces.
• Distinguish static equilibrium from dynamic equilibrium.
• Identify balanced gravity, normal force, and tension.+ Show more

Learning Objectives

• Explain how Earth's rotation produces the day-night cycle
• Describe how Earth's axial tilt and orbit produce seasons
• Explain how the Moon's orbit creates repeating lunar phases+ Show more

Learning Objectives

• Describe gravity as an attractive non-contact force between masses.
• Explain how mass and distance affect gravitational attraction.
• Identify attractive and repulsive electric interactions between charges.+ Show more

Learning Objectives

• Explain how limited resources affect population growth rates
• Interpret logistic growth curves and identify carrying capacity
• Describe how births and deaths change population size+ Show more

Learning Objectives

• Define momentum in terms of mass and velocity
• Calculate momentum using mass and velocity
• Explain conservation of momentum during simple collisions+ Show more

Learning Objectives

• Explain how organ systems cooperate to support body functions
• Describe how oxygen and nutrients are transported to cells
• Identify how organ systems contribute to homeostasis+ Show more

Learning Objectives

• Explain how mass affects an object's kinetic energy
• Calculate kinetic energy using mass and speed
• Compare kinetic energy changes caused by mass and speed+ Show more

Learning Objectives

• Explain how gravity governs orbital motion.
• Describe how mass and distance affect gravitational attraction.
• Interpret elliptical orbits and orbital periods.+ Show more

Learning Objectives

• Describe how embryonic similarities provide evolutionary evidence
• Identify conserved developmental features in vertebrate embryos
• Explain the role of transient developmental structures+ Show more

Learning Objectives

• Explain how uneven solar heating creates temperature gradients.
• Interpret wind, temperature, precipitation, and sea-surface temperature patterns.
• Describe how El Niño influences climate patterns.+ Show more

Learning Objectives

• Identify predation, competition, parasitism, mutualism, and commensalism
• Explain how species interactions affect populations and communities
• Trace direct and indirect effects through food webs+ Show more

Learning Objectives

• Explain how solar energy drives evaporation in the water cycle
• Describe how gravity moves water through Earth's systems
• Identify processes that move water into and through groundwater+ Show more

Learning Objectives

• Explain how population growth affects total resource demand
• Describe how per-capita consumption changes resource demand
• Identify ecosystem effects of urbanization and agriculture+ Show more

Learning Objectives

• Compare relative sizes and distances within the solar system
• Use astronomical units to describe distances in the solar system
• Use light-years to describe distances beyond the solar system+ Show more

Learning Objectives

• Apply superposition to determine relative ages of rock layers
• Explain original horizontality using changes to sedimentary layers
• Use cross-cutting relationships to sequence geologic events+ Show more

Learning Objectives

• Identify patterns in the frequency and distribution of natural hazards
• Explain how recurrence intervals support natural hazard risk assessment
• Interpret how hazard maps and forecasts communicate potential risk+ Show more

Learning Objectives

• Explain how digestion makes atoms available for cellular use
• Describe how biosynthesis rearranges atoms into cellular materials
• Trace carbon and nitrogen through organisms and wastes+ Show more

Learning Objectives

• Identify evidence that organisms are composed of cells
• Distinguish unicellular from multicellular organization
• Compare cell boundaries in plant and animal cells+ Show more

Learning Objectives

• Distinguish weathering, erosion, transport, and deposition
• Explain how water, ice, wind, waves, and gravity shape Earth
• Identify landforms produced by different surface processes+ Show more

Learning Objectives

• Identify patterns in fossil records and sedimentary rock layers
• Explain how index fossils help compare rock-layer ages
• Describe how fossil assemblages help correlate rock layers+ Show more

Learning Objectives

• Explain how quantitative models describe population changes
• Calculate simple trait and allele frequencies
• Interpret graphs showing changes across generations+ Show more

Learning Objectives

• Identify gravitational, elastic, and magnetic potential energy
• Explain how object arrangement affects stored potential energy
• Compare potential energy in different system arrangements+ Show more

Learning Objectives

• Define criteria and constraints in an engineering design problem.
• Distinguish measurable performance criteria from design constraints.
• Translate real-world needs into measurable performance targets.+ Show more

Learning Objectives

• Identify evidence supporting continental and tectonic plate movement
• Explain how fossils reveal past continental connections
• Interpret matching rock layers and continental margins as evidence+ Show more

Learning Objectives

• Compare design solutions using consistent measurements.
• Identify trade-offs among competing design features.
• Distinguish predicted behavior from observed prototype behavior.+ Show more