Grade 7 Worksheets

Learning Objectives

• Explain how surface area and volume affect the ability of cells to exchange materials.
• Describe how increasing surface area-to-volume ratio improves diffusion and transport.
• Identify examples of structural adaptations that increase exchange surfaces in cells and organisms.

Learning Objectives

• Explain how magma is generated through decompression, volatile addition, and heat transfer
• Describe how cooling rate influences igneous texture and the difference between intrusive and extrusive rocks
• Compare how fractional crystallization and magma mixing change magma composition+ Show more

Learning Objectives

• Differentiate physical, chemical, and biological weathering processes at Earth’s surface
• Explain how freeze-thaw cycles, thermal expansion, oxidation, hydrolysis, and dissolution affect rocks and minerals
• Describe how soil formation and climate influence weathering rates and landscape change+ Show more

Learning Objectives

• Classify chemical reactions as synthesis, decomposition, single displacement, double displacement, acid–base neutralization, or combustion
• Use particle-level reasoning to explain how atoms are conserved during reaction type changes
• Predict the general product type for common reaction patterns using balanced chemical ideas

Learning Objectives

• Identify physical and chemical properties used to select materials for specific applications
• Explain how chemical stability and corrosion resistance affect a material’s suitability
• Use property information (e.g., density, strength, melting point, solubility, reactivity) to justify material choices+ Show more

Learning Objectives

• Explain how the conservation of mass is tested using mass measurements of reactants and products in a closed system.
• Use careful measurement and correct system boundaries to account for gases and dissolved substances.
• Describe how precision and control of experimental conditions affect observed mass changes.

Learning Objectives

• Explain how energy flows through producers, consumers, and decomposers in a food web
• Describe how food webs are more resilient than simple food chains due to redundancy and alternative pathways
• Predict how changes to one species can cascade through multiple relationships in an ecosystem+ Show more

Learning Objectives

• Explain how weathering, transport, deposition, and lithification work together to form sedimentary rocks.
• Compare mechanical and chemical weathering and describe how each contributes to sediment production.
• Interpret how depositional environments influence bedding, fossils, and sedimentary structures.+ Show more

Learning Objectives

• Explain the roles of photosynthesis and cellular respiration in transferring energy in plants
• Use vocabulary correctly to describe gas exchange and energy conversion
• Identify the main idea of scientific paragraphs and choose supporting concepts

Learning Objectives

• Identify biotic and abiotic components of an ecosystem and explain how they interact
• Describe how energy enters an ecosystem through primary producers and moves through food relationships
• Use ecosystem vocabulary (e.g., producer, consumer, decomposer, sunlight, water, soil) to explain ecosystem structure and function

Learning Objectives

• Explain how invasive species spread beyond their native range and why they can outcompete native organisms.
• Describe ecological consequences of invasive species, including impacts on food webs, energy flow, and nutrient cycles.
• Evaluate how long-term changes in ecosystems can result from invasive species becoming established.

Learning Objectives

• Explain how accumulated tectonic stress leads to earthquakes along faults
• Compare normal, reverse, and strike-slip fault motion and how each reflects stress regimes
• Describe how earthquake magnitude, depth, and local geology affect shaking and seismic intensity+ Show more

Learning Objectives

• Define chemical properties and explain how they help predict chemical reactions.
• Identify observable evidence (gas, color change, temperature change, or pH change) that indicates chemical reactions.
• Differentiate reactivity with acids/bases, flammability, oxidation tendency, and pH behavior as chemical properties.

Learning Objectives

• Identify and describe major types of biotic interactions (predation, competition, mutualism, commensalism, parasitism).
• Explain how changes to one species can affect other species and community structure.
• Use evidence from scenarios to determine the type and direction of benefit or harm in an interaction.

Learning Objectives

• Explain how competition, predation, and mutualism affect population sizes and community composition.
• Describe how niches and resource use influence whether species coexist or face competitive exclusion.
• Use evidence from scenarios to identify interaction types and predict possible outcomes.

Learning Objectives

• Explain how heat, pressure, and chemically active fluids change rocks during metamorphism without complete melting
• Compare contact metamorphism and regional metamorphism and predict resulting rock textures
• Describe how metamorphic reactions and index minerals help identify metamorphic grade+ Show more

Learning Objectives

• Explain how erosion detaches sediment and how transport moves sediment by water, wind, ice, and gravity
• Describe how transport energy and distance affect grain size and sorting in sedimentary records
• Interpret landscape history using clues such as graded bedding, till, moraines, loess, and dunes

Learning Objectives

• Explain how chloroplasts capture light energy and convert it into chemical energy during photosynthesis
• Describe the roles of thylakoid membranes and the stroma in the light reactions and Calvin cycle
• Connect how carbon dioxide is fixed into sugars and how stored starch supports cellular energy needs+ Show more

Learning Objectives

• Explain how diffusion and osmosis are passive transport processes driven by concentration differences.
• Describe how a semipermeable membrane affects the movement of water in osmosis.
• Predict how environmental factors (temperature, surface area, concentration gradient) can change the rate of diffusion and osmosis.+ Show more

Learning Objectives

• Explain how producers capture energy through photosynthesis and form the base of energy pyramids.
• Distinguish between primary, secondary, and tertiary consumers based on what they eat.
• Describe why energy transfer between trophic levels is inefficient and how this limits population sizes.+ Show more

Learning Objectives

• Explain how conservation strategies such as protected areas, habitat restoration, invasive species control, and sustainable harvesting reduce human impacts.
• Use ecological ideas (food webs, population dynamics, and abiotic constraints) to predict why conservation actions help ecosystems.
• Evaluate and propose conservation strategies using adaptive monitoring and evidence-based decision-making.

Learning Objectives

• Explain how disturbances such as fire, flood, landslides, and windthrow change habitats and affect populations.
• Describe how frequency, intensity, and spatial scale influence whether disturbances increase diversity or cause declines.
• Identify examples of species responses to disturbance regimes, including rapid rebound and local extirpation.+ Show more

Learning Objectives

• Use physical and chemical properties to predict whether a substance is likely to react in a given situation.
• Identify evidence of chemical change (new substances formed) and relate it to energy changes.
• Apply property trends such as reactivity with oxygen, acid–base behavior, flammability, and solubility to anticipate products.

Learning Objectives

• Explain how evaporation and cooling lead to crystallization and the formation of crystals from solution.
• Describe nucleation and crystal growth and how they affect crystal size and shape.
• Identify how impurities and process conditions (evaporation rate and cooling profile) influence crystal purity and yield.+ 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 mantle convection, slab pull, and ridge push contribute to plate motion
• Describe the role of density differences and buoyancy in driving convection cells
• Use evidence and vocabulary to compare the relative effects of different plate mechanisms

Learning Objectives

• Explain how tectonics, magmatism, weathering, erosion, burial, and metamorphism connect within the rock cycle.
• Use rock cycle terms to describe how rocks change forms over geologic time.
• Interpret how uplift and plate motion create the conditions for recycling crustal materials.

Learning Objectives

• Identify observable indicators of chemical change in real-world examples.
• Explain why multiple indicators together strengthen evidence of chemical change.
• Use measurements and observations to support claims about whether a chemical change occurred.

Learning Objectives

• Explain the law of conservation of mass using particle-level reasoning (atoms rearrange but are not created or destroyed).
• Use the idea of a closed system to predict whether total mass will stay the same before and after a chemical reaction.
• Identify reactants and products at the particle level and describe what happens to bonds during a reaction.

Learning Objectives

• Explain how exothermic and endothermic chemical reactions change temperature through energy transfer
• Describe how bond breaking requires energy and how bond formation releases energy
• Use energy evidence, along with other signs, to distinguish chemical change from physical change

Learning Objectives

• Explain how energy transfer causes phase changes between solid, liquid, and gas
• Identify examples of melting, freezing, vaporization, condensation, sublimation, and deposition
• Use particle motion and arrangement to describe temperature and pressure effects on phases+ Show more

Learning Objectives

• Explain Newton’s third law: forces in interactions are equal in magnitude and opposite in direction.
• Differentiate between action-reaction force pairs and effects on acceleration for objects of different masses.
• Identify action-reaction pairs in everyday contact and noncontact situations, including gravity.

Learning Objectives

• Explain diffusion using the particle model and concentration gradients
• Describe how mixing occurs without chemical change and without stopping particle motion
• Predict how temperature affects the rate of diffusion+ Show more

Learning Objectives

• Explain how gravitational force, weight, and inertia relate to motion near Earth
• Differentiate gravity from support forces (normal forces) and describe when they balance or do not balance
• Use Newton’s ideas of net force to predict how objects move when support forces change

Learning Objectives

• Explain recoil and thrust using Newton’s third law (action–reaction forces).
• Compare how equal and opposite interaction forces can produce different accelerations because of different masses.
• Use ideas about momentum change to describe motion during interactions such as rockets, skateboarders, and skaters.

Learning Objectives

• Explain how air masses form and how their temperature and moisture influence weather
• Describe how fronts create zones where air rises, cools, and can form clouds and precipitation
• Predict how temperature and wind often change near a front

Learning Objectives

• Explain how human decisions create tradeoffs among farming, development, water use, and ecosystem health.
• Use environmental constraints to predict how changing conditions can affect reliability, cost, and long-term sustainability.
• Evaluate multiple outcomes of a resource decision and justify which priorities best fit a specific scenario.

Learning Objectives

• Describe how water moves through the atmosphere, land, and oceans during the water cycle.
• Explain how energy from the Sun and the role of cooling and gravity drive major water-cycle processes.
• Compare pathways such as evaporation, condensation, precipitation, runoff, and infiltration/groundwater storage.+ Show more

Learning Objectives

• Explain how decomposers (fungi and bacteria) break down dead organisms and waste matter in an ecosystem
• Describe how decomposition returns atoms and nutrients to the soil and water for producers to reuse
• Connect decomposition to the cycling of matter and the continued growth of plants and other consumers+ Show more

Learning Objectives

• Explain how energy flows through trophic levels in an ecosystem
• Describe how matter cycles through decomposition and nutrient pathways
• Predict how changes in nutrients or plant growth can affect consumer populations+ Show more

Learning Objectives

• Explain how atoms move through an ecosystem via photosynthesis, respiration, feeding, decomposition, and soil/water transport
• Identify how decomposers return nutrients to the environment and support new plant growth
• Differentiate matter cycling (recycling atoms) from energy flow (one-way movement with heat loss)

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 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

• Identify independent, dependent, and controlled variables in an investigation scenario
• Use measurable quantities to connect an investigation question to evidence
• Explain why controlling variables is necessary for fair tests+ 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 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 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

• 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