Grade 6 Worksheets

Learning Objectives

• Explain how gravitational attraction governs planetary and satellite motion.
• Describe how mutual gravity can produce elliptical orbits and changing orbital speed.
• Connect orbital period and orbital path characteristics to relative mass and distance.

Learning Objectives

• Explain how the relative positions of Earth, the Moon, and the Sun produce lunar phases and eclipses.
• Use line-of-sight and shadow geometry to distinguish phase changes from shadowing events.
• Describe the sequence and timing of primary lunar phases and predict when eclipses can occur.

Learning Objectives

• Explain how Earth’s rotation causes day and night.
• Describe how Earth’s 23.5° axial tilt and orbit affect seasonal changes in sunlight and temperatures.
• Use solstices and equinoxes as predictable observational anchors for daylight and solar altitude.

Learning Objectives

• Explain how gravitational attraction depends on mass and distance using Earth–Moon and falling-object examples
• Differentiate gravitational forces from contact forces like friction and how each affects motion
• Use evidence and reasoning to argue why changing mass or separation changes attraction+ Show more

Learning Objectives

• Explain how net force (the vector sum of forces) affects the motion of an object.
• Use the relationship net force equals mass times acceleration to predict changes in acceleration.
• Distinguish between mass (inertia) and forces when reasoning about motion.

Learning Objectives

• Explain how electric forces act between charged objects and how magnetic forces act between magnets and/or current-carrying wires.
• Predict whether an electric or magnetic force becomes stronger or weaker when distance changes.
• Describe how the direction of force depends on charge polarity or magnet orientation and how forces can balance or become unbalanced.

Learning Objectives

• Explain how momentum is conserved in an isolated two-object system during a collision
• Identify action-reaction pairs and the forces acting during contact
• Differentiate elastic and inelastic collisions using how objects move after collision

Learning Objectives

• Interpret surface weather maps using pressure systems, fronts, and temperature changes to predict short-term weather.
• Explain how air masses, pressure gradients, and fronts affect wind shifts and precipitation patterns.
• Use precipitation, temperature, and radar clues to describe likely storm development such as thunderstorms and squall lines.+ Show more

Learning Objectives

• Explain how solar energy and gravity drive the water cycle processes (evaporation, condensation, precipitation, runoff, infiltration, and groundwater storage).
• Identify how water moves between reservoirs (ocean, atmosphere, land/ice, rivers, and aquifers) and how phase changes affect that movement.
• Describe examples such as evapotranspiration, river discharge, aquifer recharge, and seasonal snowmelt and connect them to storage timescales.

Learning Objectives

• Explain how matter and energy move among Earth’s geosphere, hydrosphere, atmosphere, and biosphere using models.
• Describe feedbacks (positive and negative) that change system behavior, such as ice-albedo effects.
• Use examples like sediment transport and nutrient cycling to predict observable patterns over time.

Learning Objectives

• Explain how slow and rapid geologic processes modify Earth’s surface over different time scales.
• Use evidence such as rock strata, fossils, uplifted terraces, and erosion rates to support claims about landscape evolution.
• Compare how rivers and glaciers transport sediment and reshape landforms.

Learning Objectives

• Interpret observational and instrumental data to identify patterns in natural hazards.
• Estimate recurrence intervals from hazard histories to support risk assessment.
• Use data records (e.g., seismic, tsunami, storms, floods) to infer likely locations and magnitudes of future events.+ Show more

Learning Objectives

• Explain how unequal solar heating and Earth’s rotation create global atmospheric circulation patterns.
• Describe how ocean currents and circulation help move heat and moisture around the planet.
• Use climate-cell models and current patterns to predict regional climate zones and related events.

Learning Objectives

• Explain how genetic variation and environmental factors can produce phenotypic variation in organisms.
• Use examples (inheritance, nutrition, and temperature-dependent expression) to describe how traits change across development and populations.
• Connect DNA sequence changes and environmental/epigenetic influences to differences in structure and function.

Learning Objectives

• Explain how cells communicate using chemical and electrical signals
• Describe how receptors and signal transduction pathways connect to specific cell responses
• Compare rapid nervous impulses with longer-lasting endocrine effects using feedback circuits+ Show more

Learning Objectives

• Explain how tissues and organs work together in the circulatory, respiratory, digestive, and nervous systems.
• Describe how organ systems interact to support movement of gases and nutrients in the body.
• Connect cellular processes (like diffusion and energy use) to system-level outcomes.

Learning Objectives

• Explain how monomers form polymers through condensation reactions and how hydrolysis breaks polymers apart
• Connect molecular structure of macromolecules (proteins, nucleic acids, lipids, carbohydrates) to their functions in cells
• Describe how enzymes and membranes relate to molecular processes

Learning Objectives

• Explain how negative feedback helps maintain internal stability by linking sensors, control centers, and effectors.
• Describe positive feedback and how it can amplify changes in the body.
• Use examples (thermoregulation, blood glucose control, and kidney osmotic balance) to trace cause-and-effect pathways.

Learning Objectives

• Explain how energy is transferred during photosynthesis and respiration in plants and animals.
• Describe how matter cycles between living things and the environment using gases and organic molecules.
• Connect leaf gas exchange (stomata) to measurements of oxygen consumption and energy use.

Learning Objectives

• Explain how key organelles contribute to essential cell functions
• Connect cell structure (nucleus, ribosomes, mitochondria, chloroplasts) to their roles
• Compare plant and animal cell organelles to understand specialization

Learning Objectives

• Explain how microscopy observations and preserved specimens provide evidence that cells are the basic unit of life.
• Distinguish single-celled organisms from multicellular organisms using observable cell features.
• Connect cell characteristics to higher levels of biological organization (cells → tissues → organs → whole organisms).

Learning Objectives

• Identify and describe mutualism, competition, predation, and parasitism as recurring species interaction types.
• Use observations and species traits to predict how interaction strength changes across forest, grassland, and freshwater ecosystems.
• Explain how niche partitioning, resource overlap, and behavioral strategies affect the outcomes of species interactions.

Learning Objectives

• Explain how limiting resources affect individual organisms and population sizes
• Interpret measurement patterns (such as resource gradients) to predict where species will be most abundant
• Connect carrying capacity to population fluctuations in different environments

Learning Objectives

• Construct evidence-based arguments that connect changes in ecosystem components to population increases or declines.
• Use population metrics (birth and death rates, age structure, and population growth curves) to support causal claims.
• Explain how trophic cascades, habitat fragmentation, invasive species, predator reintroduction, and disease outbreaks can lead to recovery or collapse.

Learning Objectives

• Explain how energy moves through food webs from producers to consumers and finally to decomposers.
• Describe how matter cycles in ecosystems and how photosynthesis and cellular respiration support energy budgets.
• Use energy pyramids to predict how energy decreases at higher trophic levels.

Learning Objectives

• Compare conservation strategies, habitat restoration, protected area design, and invasive species management for biodiversity outcomes.
• Analyze trade-offs among effectiveness, feasibility, and economic constraints in maintaining ecosystem services.
• Explain how different solutions can support pollination, water purification, and nutrient cycling under changing environmental pressures.

Learning Objectives

• Explain where common synthetic materials come from by connecting natural resources to manufactured products
• Compare material properties (durability, flexibility, conductivity, and biodegradability) to material selection
• Describe how synthetic materials are processed and how that affects recycling and everyday use

Learning Objectives

• Use particle models to explain how particle motion, spacing, and collisions relate to the physical states of matter.
• Describe how temperature and thermal energy connect to particle kinetic energy and gas pressure in qualitative ways.
• Predict which change of state (melting, freezing, boiling, condensation) matches a given particle-level description.

Learning Objectives

• Use particle models to explain why total mass and atom counts stay the same in a closed system during physical and chemical changes.
• Connect mass measurements before and after reactions to conservation of mass by tracking matter through diagrams and bookkeeping.

Learning Objectives

• Identify evidence of chemical reactions using qualitative indicators such as color change, gas formation, and precipitate formation
• Use quantitative data (mass, temperature, and composition) to decide whether new substances formed
• Explain how pre-interaction and post-interaction measurements support the claim that a chemical reaction occurred

Learning Objectives

• Describe how chemical formulas and models show the relative number and types of atoms in simple molecules and extended structures.
• Use representations (ball-and-stick and space-filling) to explain how atoms combine to form compounds like H2O and NaCl.
• Explain how repeating units build polymer chains and how ionic lattices form from ions.

Learning Objectives

• Explain how homologous structures, vestigial organs, and conserved DNA sequences can support common ancestry.
• Use similarities and differences among traits to interpret branching relationships on a phylogenetic tree.
• Describe how ancestral-form indicators and morphological gradients can help form hypotheses about lineage splitting.

Learning Objectives

• Interpret allele frequency tables and describe how trait frequencies can change over generations.
• Analyze time-series and frequency information to explain population growth, decline, and stabilizing patterns.
• Use proportional reasoning to compare scenarios such as directional change and population bottlenecks.

Learning Objectives

• Explain how heritable trait differences and environmental pressures can change trait frequencies over time
• Describe the role of differential reproductive success in natural selection
• Use examples (e.g., pollution, island finches, antibiotic resistance) to connect trait advantages to population change

Learning Objectives

• Explain how fossil occurrences in different rock layers (strata) show patterns of change over geologic time.
• Use relative dating ideas to describe how fossils can be ordered, and compare this with radiometric dating.
• Describe how fossil assemblages can change when environments shift, leading to persistence or disappearance of taxa.

Learning Objectives

• Describe how species richness and occurrence patterns can reveal biodiversity trends across space and time
• Explain how comparisons such as island faunas and latitudinal gradients help identify endemism and turnover
• Use ecological and historical factors (like habitat fragmentation and colonization) to interpret why communities differ

Learning Objectives

• Explain how heritable variation and natural selection contribute to adaptation in populations.
• Describe how geographic separation and reproductive isolation lead to speciation.
• Use evidence (morphology, reproductive compatibility, and biogeography) to support claims about speciation.

Learning Objectives

• Explain how organisms compete for limited resources and how that affects survival and reproduction
• Describe how competition can be direct or indirect when organisms share requirements
• Use evidence to predict which species is more likely to persist under different resource conditions

Learning Objectives

• Explain how animals use matter from food to build body parts and grow.
• Describe how animals use energy from food to power life processes.
• Connect how matter enters an animal’s body and how matter leaves as waste or through breathing.

Learning Objectives

• Understand how surface area, porosity, and suspension geometry affect parachute drag and descent rate.
• Explain how mass-to-area ratio influences terminal velocity during parachute descent.
• Analyze how canopy design trade-offs impact descent stability and ground impact in different atmospheric conditions.

Learning Objectives

• Describe the processes of adaptation and how they lead to speciation.
• Identify factors contributing to reproductive isolation in populations.
• Use morphological, genetic, and biogeographical evidence to infer speciation events.+ Show more

Learning Objectives

• Understand how species occurrence and richness reveal biodiversity patterns across ecosystems.
• Compare spatial and temporal biodiversity among different habitats and regions.
• Interpret ecological and historical factors that influence biodiversity distribution.+ Show more

Learning Objectives

• Analyze fossil occurrences and stratigraphic sequences to understand Earth's history.
• Identify morphological transitions and their significance in fossil records.
• Understand methods of dating fossils and interpreting their environmental context.+ Show more

Learning Objectives

• Describe the process of natural selection and how it leads to changes in trait frequencies within populations.
• Explain how environmental pressures influence the survival and reproduction of organisms with different heritable traits.
• Identify real-world examples of natural selection, such as pigmentation changes, beak variation, and antibiotic resistance.+ Show more

Learning Objectives

• Understand how mathematical representations and graphs illustrate changes in population over generations.
• Analyze how environmental and demographic factors influence trait frequencies and population sizes.
• Apply proportional reasoning, interpret frequency charts, and analyze time-series graphs related to population change.+ Show more

Learning Objectives

• Compare and analyze anatomical and molecular traits in taxa.
• Interpret evolutionary relationships using phylogenetic trees.
• Identify homologous and vestigial structures in organisms.+ Show more

Learning Objectives

• Describe how atoms combine to form simple molecules like H2O and NaCl.
• Understand models such as ball-and-stick and space-filling representations used in chemistry.
• Explain how molecules and extended structures are represented with chemical formulas and diagrams.+ Show more

Learning Objectives

• Describe key indicators used to identify chemical reactions, including color change, gas evolution, precipitate formation, and temperature change.
• Interpret data such as mass, temperature, and composition before and after reactions to determine if a new substance has formed.
• Identify and analyze classic examples like acid–carbonate reactions and metal oxidation to understand criteria for chemical change.+ Show more