Science Worksheets

Learning Objectives

• Compare physical and chemical changes by describing how energy transfer relates to what happens to particles and bonds.
• Explain endothermic and exothermic processes using the direction of energy flow and the resulting temperature changes.
• Use system–surroundings thinking to predict whether energy is absorbed or released during a change.

Learning Objectives

• Differentiate physical changes from chemical changes by using evidence from observations.
• Identify physical properties and chemical properties and connect them to real-world examples.
• Explain how atoms and bonds relate to chemical change, while state/form changes relate to physical change.

Learning Objectives

• Interpret position–time and velocity–time graphs to determine motion patterns over time.
• Use graph features (slope and area) to reason about speed changes and direction changes.
• Differentiate between constant and varying acceleration based on graph shapes.

Learning Objectives

• Explain how crossing over during meiosis increases genetic variation.
• Describe how independent assortment changes which chromosomes end up in gametes.
• Connect meiosis and fertilization to why siblings can show different observable traits.

Learning Objectives

• Explain how energy can move between objects and change form during physical processes.
• Use examples like friction and household devices to describe transformations between mechanical, electrical, thermal, and light energy.
• Apply the idea of energy conservation by tracking energy changes rather than energy disappearing.

Learning Objectives

• Interpret how temperature, humidity, dew point, wind, and air pressure relate to observable weather patterns.
• Use short-term variability and long-term averages to distinguish typical weather from climate change.
• Analyze how air mass movement and energy exchange near Earth’s surface influence precipitation timing and storm intensity.

Learning Objectives

• Differentiate biotic and abiotic components of terrestrial and aquatic ecosystems
• Explain how boundaries and spatial scales are used to study ecosystems
• Describe how habitat heterogeneity and abiotic gradients influence species distributions and assemblages+ Show more

Learning Objectives

• Use the dot-product idea of work, W = Fd cosθ, to calculate work for forces at an angle.
• Distinguish between work done by constant forces and work done by variable forces.
• Compute work for variable forces by interpreting and approximating the area under a force–distance curve.+ Show more

Learning Objectives

• Understand the dissociation steps and constants of polyprotic acids.
• Interpret titration curves involving polyprotic acids and buffers.
• Calculate stepwise dissociation, cumulative acidity, and analyze environmental relevance of carbonate and phosphate systems.

Learning Objectives

• Describe the roles of the cell membrane, cytoplasm, nucleus, mitochondria, and chloroplast in maintaining cell function and homeostasis
• Explain how compartmentalization helps organize chemical reactions inside cells
• Compare prokaryotic and eukaryotic cell structure and identify key similarities and differences

Learning Objectives

• Explain how cellular respiration and photosynthesis transform energy and exchange matter between cells and their environment
• Describe how diffusion and osmosis move materials across cell membranes based on concentration gradients
• Connect organelle interdependence to ATP production and energy budgets in the cell

Learning Objectives

• Identify the three primary modes of thermal energy transfer: conduction, convection, and radiation.
• Describe the molecular mechanisms that underlie conduction and convection, and explain why radiation does not require a medium.
• Compare typical media (solids, fluids, and space) and relative behavior (how quickly and through what) for each mode using everyday examples.

Learning Objectives

• Explain how negative feedback and positive feedback help maintain internal stability (homeostasis).
• Describe how sensors, control centers, and effectors work together to regulate variables at cellular and body levels.
• Use examples such as blood glucose, temperature, and water balance to connect signals to physiological responses.

Learning Objectives

• Explain how iterative design cycles compare outcomes to criteria and constraints to improve solutions
• Use evidence from testing to make evidence-based design decisions instead of relying on initial assumptions
• Identify trade-offs in engineering designs using examples such as a leak-resistant sports bottle lid

Learning Objectives

• Understand the principles of titration and how to perform calculations involving concentration and volume.
• Apply stoichiometry to determine unknown concentrations and endpoint pH in titration problems.
• Analyze different types of titration systems, including strong acid-strong base and weak acid-weak base.+ Show more

Learning Objectives

• Explain how net force determines whether an object’s velocity changes in speed, direction, or both
• Differentiate between balanced forces and unbalanced forces using the idea of net force
• Predict the direction of acceleration from the direction of the net force+ Show more

Learning Objectives

• Explain how semiconservative DNA replication uses parental strands as templates.
• Describe the roles of helicase, primase, DNA polymerase, and proofreading during replication.
• Compare leading and lagging strand synthesis, including Okazaki fragments.+ Show more

Learning Objectives

• Explain how carbon moves between the atmosphere, biosphere, hydrosphere, and geosphere during carbon cycling.
• Compare the roles of photosynthesis and respiration in changing carbon dioxide levels.
• Describe how oceans, sediments, and fossilization sequester carbon over longer timescales.+ Show more

Learning Objectives

• Explain how species composition, relative abundance, and spatial arrangement describe community structure
• Use biodiversity metrics (species richness, evenness, functional diversity, and keystone species) to predict ecosystem functioning and stability
• Describe how succession, spatial heterogeneity, habitat connectivity, and invasive species influence community assembly and resilience+ Show more

Learning Objectives

• Explain how elements cycle among living organisms, soil, water, and the atmosphere using examples from the carbon, nitrogen, and phosphorus cycles.
• Describe key processes (e.g., photosynthesis, respiration, fixation, nitrification, assimilation, ammonification, denitrification).
• Interpret how residence time and pool size affect nutrient availability and ecosystem productivity.

Learning Objectives

• Explain how reflection preserves frequency while reversing wave direction at a boundary.
• Describe how refraction changes wave speed and wavelength while keeping frequency constant.
• Compare ray and wave representations to predict how light or sound paths change across media.

Learning Objectives

• Explain how applied loads create internal forces (bending moment, shear force, axial force, and torsion) in structural members.
• Describe how beam and cantilever support conditions affect deflection and serviceability.
• Compare bending- and shear-dominated members with axial-dominated members such as columns and truss bars.

Learning Objectives

• Identify ethical expectations for data integrity, attribution, and responsible communication in STEM projects
• Explain how technical reports and graphs should present methods, uncertainty, and limitations clearly
• Describe why peer review and public presentation affect reliability and public understanding of findings+ Show more

Learning Objectives

• Explain how cell membranes regulate transport to maintain homeostasis.
• Describe how cells use energy (ATP) to power chemical reactions involved in growth and survival.
• Use evidence such as uptake rates and growth patterns to connect cell structure and function.+ Show more

Learning Objectives

• Explain how water moves through Earth’s reservoirs using evaporation, condensation, precipitation, runoff, and groundwater recharge.
• Describe how carbon shifts among the atmosphere, living things, oceans, and rocks through photosynthesis, respiration, and chemical exchange.
• Connect Earth’s radiation balance (incoming solar energy and outgoing infrared energy) to temperature, weather, and cycle rates.

Learning Objectives

• Explain how genetic drift changes allele frequencies through chance events, especially in small populations
• Compare bottleneck and founder effects and describe how each can reduce genetic variation
• Evaluate why drift can change allele frequencies independently of fitness and how this differs from natural selection+ Show more

Learning Objectives

• Explain how particle motion helps describe gas pressure and temperature
• Describe how increasing temperature changes collision frequency and collision force
• Use the particle model to justify why gas pressure does not depend on one direction of motion

Learning Objectives

• Explain how identifying failure points can guide design improvements
• Connect failure causes to specific design features using evidence
• Evaluate design trade-offs between competing constraints (e.g., strength vs. weight)+ Show more

Learning Objectives

• Explain how measurement accuracy depends on appropriate instruments, calibrated equipment, and consistent units.
• Use significant figures to reflect the precision justified by a measuring device and method.
• Convert between units and record data consistently to reduce misinterpretation.+ Show more

Learning Objectives

• Explain how birth, death, immigration, and emigration affect population size over time
• Describe how biotic interactions (competition, predation, disease) and abiotic limits influence population growth
• Differentiate exponential growth from logistic growth using the idea of carrying capacity+ Show more

Learning Objectives

• Identify when to use a table, bar graph, or line graph to represent different kinds of data.
• Read graphs and tables using correct labels, units, and scales.
• Compare categories and describe change over time using appropriate graph types.

Learning Objectives

• Interpret acceleration from speed–time and distance–time data using graph shape and slope changes
• Determine whether acceleration is roughly constant or changing by analyzing patterns across equal time intervals
• Relate increases and decreases in speed to the direction (sign) of acceleration relative to motion

Learning Objectives

• Identify independent, dependent, and controlled variables in an investigation design.
• Explain how controls and safety procedures improve the reliability of experimental results.
• Use accurate measurement and data recording practices to support valid conclusions.

Learning Objectives

• Explain how biogeochemical cycles move and transform key elements (carbon, nitrogen, phosphorus, and water) among Earth’s systems.
• Describe how biological processes (photosynthesis, respiration, and decomposition) interact with physical and chemical processes in nutrient recycling.
• Analyze how human activities can alter nutrient availability and affect ecosystem productivity.+ Show more

Learning Objectives

• Explain energy conservation using the idea of a system and its surroundings.
• Describe how energy can change form while the total energy of the combined system stays constant.
• Use the roller coaster example to predict where energy transfers and how forms change.

Learning Objectives

• Describe the major structural features of DNA, including nucleotides, antiparallel strands, and the sugar-phosphate backbone.
• Explain how complementary base pairing (A–T and C–G) and hydrogen bonding stabilize the double helix.
• Connect DNA’s structure to its biological functions: replication and information transfer to RNA.

Learning Objectives

• Explain how promoters, enhancers, and transcription factors control RNA polymerase binding during transcription
• Describe how post-transcriptional mechanisms such as alternative splicing and RNA interference change mRNA outcomes
• Summarize how epigenetic modifications (DNA methylation and histone changes) affect chromatin accessibility and long-term gene expression

Learning Objectives

• Explain how uncertainty can be displayed on graphs using error bars, uncertainty bands, and annotated ranges in tables.
• Interpret whether differences between conditions are meaningful by comparing overlaps (or lack of overlap) in uncertainty.
• Use uncertainty reasoning to support or question conclusions about trends in scientific data.

Learning Objectives

• Explain how mining can alter landscapes and affect water, soil, air, and ecosystems.
• Describe key long-term risks such as tailings leakage and acid rock drainage (ARD).
• Identify how impact assessment and reclamation plans reduce environmental and social harm.+ Show more

Learning Objectives

• Explain how ATP stores and releases energy through phosphate bond hydrolysis.
• Describe how cells produce ATP via substrate-level phosphorylation and oxidative phosphorylation.
• Connect ATP energy use to endergonic processes such as active transport and mechanical work.

Learning Objectives

• Explain ecological succession as predictable change in community composition after a disturbance
• Distinguish primary succession from secondary succession using examples
• Identify key drivers of succession, including soil development, seed dispersal, competition, and facilitation+ Show more

Learning Objectives

• Explain how exponential growth differs from logistic growth in real populations
• Identify limiting factors and distinguish density-dependent from density-independent influences
• Interpret population curves and relate curve patterns to resource limits and environmental variability

Learning Objectives

• Explain how distance affects sound amplitude and perceived loudness
• Connect frequency to pitch and amplitude to perceived volume
• Describe how reflection creates echoes and absorption reduces sound intensity+ Show more

Learning Objectives

• Explain energy conservation in terms of transfer and transformation within a closed system
• Use qualitative energy accounting to relate initial and final energy forms in real scenarios
• Describe how nonconservative forces reduce mechanical energy by transferring energy to thermal energy

Learning Objectives

• Explain the iterative design process (conceptual design, prototyping, measurement, and refinement).
• Use performance specifications and trade-offs involving lift, drag, weight, and stability.
• Describe how scaled models and computational approximations help predict aerodynamic performance.+ Show more

Learning Objectives

• Explain the relative roles of the Sun, Earth, and Moon by comparing their masses and dominant gravitational influence
• Describe how the Earth–Moon system’s mutual gravity creates a barycenter and affects their shared motion
• Relate gravitational balance and mutual motion to stable orbits and everyday evidence such as Moon phases and tides

Learning Objectives

• Explain how robotic missions to the solar system can be designed using mission types such as flyby, orbiter, lander, and sample-return.
• Describe major engineering constraints (distance, communication delay, and planetary environments) that affect robotic spacecraft design.
• Identify how propulsion, gravity assists, instrumentation, and data return work together to achieve mission goals.+ Show more

Learning Objectives

• Identify common sources of uncertainty in scientific measurements and models (instrument limits, human judgment, environmental variation, and simplifications).
• Explain how uncertainty affects conclusions by relating uncertainty size to observed differences.
• Interpret uncertainty using measurement reasoning such as repeated trials, range/spread, and confidence in results.