Grade 7 Science Worksheets

Learning Objectives

• Explain how test data can show whether a design meets success criteria.
• Describe specific design changes and connect each change to evidence from results.
• Justify revisions while considering constraints such as safety, available materials, and cost.

Learning Objectives

• Explain how chloroplasts capture light energy and use it to help make energy-rich molecules during photosynthesis.
• Describe where photosynthesis steps happen inside chloroplast structures (thylakoids and stroma).
• Connect how carbon dioxide is used to form sugars and how chloroplasts relate to cellular respiration and energy balance.

Learning Objectives

• Interpret performance test data to identify design weaknesses.
• Understand how design modifications can enhance performance.
• Connect test results to specific design changes and constraints.

Learning Objectives

• Explain how vibrating objects produce sound through pressure waves in a medium
• Relate frequency to pitch and amplitude to loudness
• Describe how sound transmission depends on the presence of a medium+ Show more

Learning Objectives

• Explain how bolted, welded, and bearing connections transfer loads and help maintain continuous load paths.
• Describe shear, bearing, and slip effects at connections and how these influence structural behavior.
• Use bridge truss nodes and column-to-footing assemblies to predict how connection stiffness and detailing affect capacity and failure modes.+ Show more

Learning Objectives

• Explain why the total amount of matter stays the same in a closed system during physical and chemical changes
• Use particle-level ideas (atoms and molecules) to describe dissolving, mixing, and chemical reactions
• Interpret evidence from mass measurements to support conservation of matter

Learning Objectives

• Understand the structure and function of red blood cells
• Identify morphological differences among specialized cells
• Explain how cell structures enable specific tasks in the body

Learning Objectives

• Identify major reaction types (synthesis, decomposition, single/double displacement, acid–base neutralization, combustion) and describe what changes at the particle level.
• Predict the general class of products by recognizing bonds broken and bonds formed in a reaction.
• Explain how conservation of mass and the rearrangement of atoms connect to reaction types.

Learning Objectives

• Explain how torque and the fulcrum affect the mechanical advantage of a lever
• Calculate ideal mechanical advantage for common lever and pulley systems using simple arithmetic
• Relate geometry (lever arm length, pulley rope segments) to the direction and size of input and output forces+ Show more

Learning Objectives

• Understand the concept of a keystone species and its role in ecosystems.
• Identify examples of keystone species and their effects on biodiversity.
• Analyze the consequences of removing a keystone species from an ecosystem.+ 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

• Define physical properties and explain why they are useful for identifying and classifying materials
• Use macroscopic measurements (mass, volume, density, melting/boiling points) as diagnostic criteria for purity
• Connect physical properties (conductivity and optical clarity) to the microscopic behavior of particles

Learning Objectives

• Explain what ecosystem resilience means and how disturbances affect community structure
• Describe how population growth and decline can indicate changes in ecosystem stability
• Use evidence from disturbances to predict whether an ecosystem will recover quickly or undergo longer changes+ Show more

Learning Objectives

• Understand how comparative anatomy provides evidence for evolution.
• Identify homologous and analogous structures among species.
• Analyze morphological features to infer phylogenetic relationships.+ Show more

Learning Objectives

• Define what mitochondria are and their function in energy production.
• Describe the structure of mitochondria and how it relates to their function.
• Explain how mitochondria convert nutrients into energy through cellular respiration.+ Show more

Learning Objectives

• Define what pure substances are and identify their properties
• Differentiate pure substances from mixtures and solutions
• Recognize regional examples of matter classification+ Show more

Learning Objectives

• Explain how energy moves through an ecosystem from producers to consumers and decomposers
• Describe how trophic levels and metabolic processes affect the amount of usable energy available
• Use food-chain and food-web ideas to predict how changes at one trophic level can affect others+ Show more

Learning Objectives

• Describe the main processes involved in the rock cycle
• Identify different types of rocks and how they form
• Explain the role of geological forces such as uplift and erosion+ Show more

Learning Objectives

• Explain the main processes that form igneous, sedimentary, and metamorphic rocks.
• Describe how energy (cooling, heat, pressure) and Earth-surface processes (weathering and deposition) connect in the rock cycle.
• Use the rock cycle to trace how rocks change across geologic time.

Learning Objectives

• Use metric units and prefixes to report measurements with appropriate precision and units.
• Estimate uncertainty by comparing repeated measurements and documenting variability.
• Select suitable measuring tools and calibrate instruments to reduce systematic error.+ Show more

Learning Objectives

• Explain the difference between design criteria and design constraints in a solution design
• Identify examples of measurable criteria and limiting constraints in a real-world problem
• Describe how human needs and environmental impacts influence acceptable design outcomes

Learning Objectives

• Describe how competition, predation, mutualism, and parasitism affect species interactions and ecological niches
• Explain how niche partitioning reduces competition and helps multiple species coexist
• Identify how keystone species influence community composition and stability+ Show more

Learning Objectives

• Explain tradeoffs among freshwater options such as storage, recharge, recycling, and desalination.
• Identify design constraints (quality, infrastructure limits, ecosystem impacts) that affect water-system decisions.
• Use cause-and-effect reasoning to predict how changes in a water system can impact reliability and pollution risk.

Learning Objectives

• Understand the basic quantities used to describe motion: distance, time, and speed.
• Learn how to interpret and represent data related to motion.
• Calculate average speed given distance and time.

Learning Objectives

• Explain the conservation of mass rule for a closed system during physical and chemical changes.
• Use the idea that atoms are conserved to predict whether total mass changes after a reaction in a sealed container.
• Identify key details about reactants, products, and the role of the closed system.

Learning Objectives

• Understand the concept of friction and how it affects motion
• Identify different types of friction in everyday situations
• Explain how surface texture influences friction+ Show more

Learning Objectives

• Define what a closed system is in scientific terms.
• Explain why mass appears to stay constant in a closed system during reactions.
• Distinguish between open and closed systems based on matter transfer.+ Show more

Learning Objectives

• Explain how cell structures match specific cell functions.
• Identify examples of specialized cells and describe what makes each one effective.
• Relate cell specialization to how tissues and organs perform their tasks.

Learning Objectives

• Describe the Earth system spheres (atmosphere, hydrosphere, geosphere, biosphere) and how they interact
• Explain how movement of water and gases connects the spheres and affects weather and ecosystems
• Predict how a change in one sphere can cause effects in other spheres

Learning Objectives

• Explain the principle of conservation of mass at the particle level in chemical reactions.
• Describe how atoms are conserved and rearranged during chemical processes.
• Recognize that in a closed system, the total mass remains the same before and after a reaction.+ Show more

Learning Objectives

• Explain how fair testing keeps all conditions the same except the intended design variable.
• Choose appropriate measurement tools and describe measurements using correct units and scales.
• Interpret results by attributing differences to the design rather than to the testing setup.

Learning Objectives

• Identify inputs, outputs, and energy transfers in an energy system model.
• Explain how energy accounting reflects conservation of energy.
• Interpret simple energy flow ideas using useful output energy and waste heat.

Learning Objectives

• Explain how a keystone species can strongly affect ecosystem structure and biodiversity even when it is not the most abundant organism.
• Describe how removing a keystone species can cause trophic cascades and change energy flow through a food web.
• Use evidence from food webs to identify why keystone species are important for conservation planning.

Learning Objectives

• Explain how the particle model describes matter as atoms and molecules in constant motion.
• Describe how chemical changes involve breaking and forming bonds between particles.
• Use the particle model to justify why mass is conserved in a closed system.

Learning Objectives

• Explain how simple mechanisms transfer motion and force in engineered systems
• Describe how input energy produces output performance in a connected system
• Use examples of gears, pulleys, levers, and linkages to predict changes in speed and force

Learning Objectives

• Interpret symbolic chemical equations and explain what quantitative information they can (and cannot) provide about matter interactions.
• Read and compare graphs of mass or temperature versus time to determine trends such as reaction rate or energy change.
• Use tabulated experimental data and stoichiometric relationships to make quantitative comparisons.+ Show more

Learning Objectives

• Explain how groundwater is stored and how it moves through aquifers.
• Describe how recharge and infiltration affect groundwater availability over time.
• Analyze how groundwater pumping can change surface water flow and water quality.

Learning Objectives

• Interpret variability and assess the reliability of data sets using measures such as mean, median, and range.
• Analyze graphical representations like histograms and box plots to evaluate data spread and identify possible misconceptions.
• Compare data sets through replicated trials and proportional reasoning to determine consistency and significance of findings.+ Show more

Learning Objectives

• Understand the basic principles of chromatography and its importance in scientific analysis.
• Identify the different components of chromatography, including stationary and mobile phases.
• Explain how molecular polarity affects the separation of compounds.+ Show more

Learning Objectives

• Explain how energy moves through an ecosystem using producers, consumers, and decomposers
• Describe how photosynthesis supplies energy and how each trophic transfer reduces usable energy
• Interpret food chains and trophic levels to predict how changes at one level can affect others

Learning Objectives

• Explain how chloroplasts capture light energy and convert it into chemical energy during photosynthesis.
• Describe the roles of thylakoids and the stroma in forming ATP and NADPH and producing sugars.
• Connect chloroplast energy storage and starch production to plant energy needs and respiration in mitochondria.

Learning Objectives

• Define net force as the vector sum of all forces acting on an object.
• Describe how unbalanced forces cause changes in an object's motion.
• Use diagrams and reasoning to analyze the effects of forces, including friction and applied forces.+ Show more

Learning Objectives

• Distinguish quantitative observations from qualitative observations in everyday science scenarios.
• Select appropriate metric units and common instruments for measuring length, mass, and volume.
• Describe how a scientific inquiry uses observations, questions, hypotheses, measurements, and evidence.+ Show more

Learning Objectives

• Understand how clouds form through condensation and cooling.
• Identify different types of clouds based on height and appearance.
• Explain the process of precipitation and how water returns to Earth's surface.+ Show more

Learning Objectives

• Understand the principle of conservation of mass in closed systems.
• Identify how mass is conserved during chemical reactions.
• Calculate mass relationships between reactants and products.+ Show more

Learning Objectives

• Differentiate weather from climate and explain why climate is based on long-term patterns
• Identify major climate drivers such as solar energy, atmospheric circulation, and the distribution of water
• Explain how ocean heat storage and release can influence regional climate trends+ Show more

Learning Objectives

• Explain how engineering designs respond to intended function and real-world constraints.
• Describe how loads and forces distribute through structural and mechanical systems (e.g., bridges and pulleys).
• Identify how circuits transfer electrical energy and how design choices affect safety and reliability.+ Show more

Learning Objectives

• Understand predator and prey relationships
• Identify examples of predator-prey interactions in ecosystems
• Explain the importance of predator-prey dynamics in maintaining ecological balance