Grade 3 Science Worksheets

Learning Objectives

• Describe how to compare motions using distance and time information.
• Distinguish steady-speed motion from changing-speed motion using summaries.
• Use relative language and simple ratios to decide which object is faster.+ Show more

Learning Objectives

• Describe how moisture, freezing, and sunlight can weaken materials over time
• Identify how corrosion affects metal strength and stiffness
• Explain why design choices include safe margins for expected environmental exposure

Learning Objectives

• Explain how soil pore size and structure affect water retention and drainage
• Describe how soil aeration influences oxygen supply to plant roots
• Compare loam, clay, and sandy soils using retention, drainage, and aeration+ Show more

Learning Objectives

• Describe how a sloped surface changes an object's tendency to move by comparing the pull that acts along the slope.
• Compare gentle and steep inclines using the idea of “speed tendency” from gravity along the surface.
• Explain how surface features and object motion (rolling or sliding) can change what happens on an incline.

Learning Objectives

• Identify how rigid and pin connections affect stiffness and movement in structures
• Explain how fasteners and adhesives transfer loads through joints
• Describe how joint geometry and bearing area can change stress concentration+ Show more

Learning Objectives

• Explain how changing one influence affects an outcome using qualitative cause-and-effect reasoning
• Predict how slope incline and additional influences change the speed and direction of motion
• Use comparisons (greater/less) to justify predictions about resistive interactions

Learning Objectives

• Identify the main components of soil: mineral particles, organic matter, water, and air.
• Describe how sand, silt, and clay particle sizes affect soil texture and drainage.
• Explain how organic matter and pore space relate to aeration and nutrient availability.+ Show more

Learning Objectives

• Describe how weathering, deposition, and organic matter help form soil
• Explain how physical, chemical, and biological processes break down rock
• Identify factors that influence the rate of soil formation and the development of fertile topsoil+ Show more

Learning Objectives

• Describe how water moves through soil using infiltration, percolation, capillary rise, and runoff
• Compare how soil texture and structure affect how quickly water spreads and drains
• Explain how slope can change surface runoff and water flow

Learning Objectives

• Describe how human actions can change soil quality over time
• Identify ways soil erosion, compaction, and nutrient loss can happen
• Explain how conservation practices help protect soil health+ Show more

Learning Objectives

• Describe how xylem and transpiration pull move water through stems to support growth
• Explain how phloem translocation moves sugars to different parts of a plant
• Compare herbaceous and woody stems by vascular bundle arrangement and growth over time+ Show more

Learning Objectives

• Identify the main parts of a flower and describe their roles in reproduction.
• Explain how pollen is produced, received by the stigma, and how fertilization leads to seeds.
• Compare wind pollination and animal pollination and describe traits that help flowers interact with pollinators.+ Show more

Learning Objectives

• Identify the main parts of vascular plants: roots, stems, leaves, and flowers.
• Describe how roots, stems, leaves, and flowers help plants grow and reproduce.
• Connect specific structures (like taproots and woody stems) to their functions.+ Show more

Learning Objectives

• Explain how friction is a resistive force that can slow or stop moving objects.
• Compare sliding versus rolling to describe differences in friction effects.
• Predict how different surface textures and materials change how easily an object moves.+ Show more

Learning Objectives

• Explain how distance and elapsed time describe motion
• Calculate and compare speeds using consistent units
• Record motion results using clear numbers and short statements+ Show more

Learning Objectives

• Describe how balanced and unbalanced influences affect an object’s motion
• Explain what net influence means as the combined effect of several pushes or pulls
• Predict whether an object stays at rest or changes speed or direction

Learning Objectives

• Identify structural forms (arches, beams, and frames) and describe their typical uses
• Compare how curvature, span, and connections affect strength and stability
• Distinguish compressive and bending behavior in simple structural examples

Learning Objectives

• Identify common load types acting on structures, including dead loads and live loads.
• Distinguish point loads from distributed loads using everyday examples.
• Describe how internal forces (compression, tension, bending, and shear) relate to common structure parts such as beams, columns, and arches.+ Show more

Learning Objectives

• Describe how different root systems (fibrous and taproot) help plants get water and nutrients.
• Explain how root hairs and mycorrhizal associations increase nutrient and water absorption.
• Compare how storage roots and specialized aerial roots help plants survive in different environments.+ Show more

Learning Objectives

• Identify major seed dispersal strategies (wind, animals, water, and ballistic ejection) and describe how they work
• Explain how dispersal patterns help plant populations colonize new areas over generations
• Describe how seed shape and timing can match dispersal methods to improve seed establishment+ Show more

Learning Objectives

• Explain how forces can combine to create a single net effect on an object
• Use directional arrows to model co-directional and opposite forces qualitatively
• Describe how a dominant force direction affects resulting motion

Learning Objectives

• Identify stewardship practices that protect soil fertility and reduce erosion
• Explain how riparian buffers, reforestation, and compost support soil function
• Compare how urban green spaces and surface sealing affect groundwater recharge

Learning Objectives

• Describe the major stages of seed germination, including imbibition, radicle emergence, hypocotyl/epicotyl growth, cotyledon role, and true-leaf emergence.
• Explain how seed reserves support early plant growth before photosynthesis begins.
• Identify which environmental conditions (moisture, temperature, oxygen) help seeds germinate successfully.

Learning Objectives

• Compare common building materials using density, stiffness, and strength properties.
• Explain how brittleness, corrosion resistance, and load type affect structural stability.
• Choose suitable materials for a simple construction scenario based on trade-offs.

Learning Objectives

• Describe how soil, light, water, temperature, and nutrients affect plant germination and growth
• Explain how human practices and environmental stresses can change where plants survive and establish
• Use evidence from scenarios to predict how a change in conditions may affect plant survival

Learning Objectives

• Compare how annuals, biennials, perennials, and woody plants differ in germination, flowering, seed set, and dormancy timing.
• Explain how seeds use dormancy and how seasonal cues help plants begin growth when conditions improve.
• Describe how seed banking and multi-year survival strategies help plant populations persist after unfavorable seasons.+ Show more

Learning Objectives

• Identify common soil horizons and describe how they differ in color and texture
• Explain how water movement and soil processes affect soil layers over time
• Use landscape position and vegetation to predict which horizons may be thicker or more fertile+ Show more

Learning Objectives

• Describe how forces move from where they act to structural supports through a load path.
• Identify how trusses, beams, and columns share axial forces, shear, and bending moments.
• Explain how supports and foundations accept combined loads to help structures stay stable.

Learning Objectives

• Identify design choices that improve strength and stability in simple structures
• Explain how intended function, load paths, supports, and span affect structural performance
• Describe common failure modes such as buckling, tension fracture, and joint slippage+ Show more

Learning Objectives

• Define force as a push or a pull
• Explain how a force can change an object's speed or direction
• Distinguish between contact forces and non-contact forces in everyday examples+ Show more

Learning Objectives

• Observe and identify patterns in different types of motion.
• Use simple measurements to predict future movement of objects.
• Recognize common motion trends such as constant speed, acceleration, and deceleration.+ Show more

Learning Objectives

• Describe the difference between magnetic and contact forces.
• Identify examples of magnetic attraction and repulsion.
• Explain how distance and pole orientation affect magnetic forces.+ Show more

Learning Objectives

• Generate two or more solution ideas using simple sketches or models.
• Compare solutions using measurements and stated criteria.
• Explain trade-offs by citing evidence from a model or test.

Learning Objectives

• Explain how a fair test controls variables to compare prototype designs.
• Identify common failure points and describe what happened during a test.
• Propose targeted design changes based on recorded evidence.+ Show more

Learning Objectives

• Define design criteria and constraints for a given engineering problem
• Identify desired function, measurable success measures, and limits in a design scenario
• Describe trade-offs between competing requirements when choosing a solution

Learning Objectives

• Identify whether an interaction is magnetic (at a distance) or a contact interaction (touching).
• Explain how magnet poles can cause attraction or repulsion.
• Describe how changing distance can affect the strength of magnetic attraction or repulsion.+ Show more

Learning Objectives

• Explain how an external or internal structure helps an organism survive and reproduce.
• Identify evidence that links structure (form) to the job it performs (function).
• Compare how different species have different structures for similar life needs.+ Show more

Learning Objectives

• Explain how groups of organisms can increase survival through shared defense, foraging, or care of young.
• Describe how competition for limited resources affects which traits help a population survive.
• Use observable traits and ecological context to support a claim about group survival.

Learning Objectives

• Make a reasoned claim about which design solution best reduces flooding or strong-wind impacts
• Use observational evidence and simple models to compare solution effectiveness under different weather scenarios
• Explain trade-offs among cost, durability, and fit to local topography

Learning Objectives

• Explain how balanced forces can keep an object’s motion the same
• Describe how unbalanced forces change an object’s motion
• Compare contact forces and the effect of net force on motion

Learning Objectives

• Explain how adaptations help organisms survive by matching their needs to habitat conditions.
• Describe examples of adaptations in deserts and in forests/grasslands.
• Use evidence from a habitat scenario to predict how an organism might survive when conditions change.

Learning Objectives

• Identify common external structures in plants and animals and explain how they help living things survive.
• Describe how internal structures (such as hearts and digestive tracts) support body functions.
• Use a model or drawing to show how structures are arranged and connected to body systems.

Learning Objectives

• Observe repeated motions and identify regular patterns in speed and direction.
• Use distance and time information to compare and predict future motion.
• Describe how ramps and surface friction can change motion over time.

Learning Objectives

• Explain how climate summaries use long-term averages and ranges instead of daily observations.
• Interpret temperature and precipitation information presented in tables and graphs.
• Describe a region’s usual climate using evidence from a data representation.

Learning Objectives

• Explain how test results provide evidence for improving a design.
• Describe how specific changes (shape, support, or materials) can improve performance.
• Match outcomes from a test to the original problem goal and revise a solution.

Learning Objectives

• Identify how classification rules use observable features to group organisms
• Use a given rule to place a new organism into the correct group
• Explain why classification creates clear categories and helps compare organisms

Learning Objectives

• Explain how producers, prey, predators, and habitats are connected in a simple ecosystem.
• Describe how habitat conditions affect plant growth and animal survival.
• Use cause-and-effect reasoning to show how changes in one part of an ecosystem can affect other parts.

Learning Objectives

• Explain how offspring can inherit traits from parents
• Describe variation among individuals in a population using examples
• Use simple trait data to identify inherited characteristics and variation+ Show more