Grade 3 Science Worksheets

Learning Objectives

• Explain how multiple simultaneous forces combine to create a net effect on an object’s motion.
• Use directional arrow ideas to determine whether forces add or cancel when they point the same or opposite directions.
• Compare qualitative force strengths to predict the dominant direction of motion.

Learning Objectives

• Explain why safe tool use helps prevent injuries and protects materials.
• Identify safe workspace behaviors and correct tool handling practices.
• Use safety rules to choose appropriate actions when building or measuring.

Learning Objectives

• Identify how intended function and load paths affect the strength of a simple structure
• Explain how support location and span limitation help prevent sagging and collapse
• Describe common failure modes such as buckling, tension fracture, and joint slippage

Learning Objectives

• Explain that a force is a push or a pull that can change an object’s speed or direction.
• Identify the direction and magnitude of a force in everyday situations.
• Distinguish contact forces and non-contact forces using simple examples.

Learning Objectives

• Explain how a habitat provides shelter, food, water, and environmental conditions for living things.
• Identify examples of shelter in different habitats (forest floor, pond, field).
• Describe how living things in the same habitat interact when their needs overlap.

Learning Objectives

• Describe how plant roots absorb water and dissolved minerals from soil
• Explain how different root shapes help plants survive in different environments
• Identify how roots support anchoring and help transport materials to stems and leaves+ Show more

Learning Objectives

• Describe how conservation practices help keep soil healthy over time
• Identify ways to reduce runoff, erosion, nutrient loss, and chemical pollution
• Explain how vegetation, compost, and buffers can protect water and fertility

Learning Objectives

• Explain how vibrating objects produce sound
• Describe how pitch and volume can change based on vibrations
• Identify examples of sound makers and the vibrations they create+ Show more

Learning Objectives

• Describe the stages of a plant life cycle from seed to adult plant.
• Explain how water, air, and light help plants grow during different stages.
• Identify why adult plants produce seeds to continue the life cycle.

Learning Objectives

• Explain how evidence can support or challenge a model’s predictions.
• Use observations to judge whether a model’s main idea fits real results.
• Revise an explanation when evidence does not match a model.

Learning Objectives

• Explain that animal life cycles follow predictable stages from birth (or hatching) to adulthood
• Describe how animals change form and needs as they grow
• Connect life-cycle stages to how animals survive and reproduce+ Show more

Learning Objectives

• Explain how engineering design steps begin with a need or situation and lead to a workable goal.
• Identify how asking questions and defining the problem help guide a solution.
• Describe how proposed solutions must consider constraints such as size, time, and required function.

Learning Objectives

• Explain the difference between weather and climate using long-term averages and ranges
• Describe how scientists use many years of data to find typical temperature and precipitation conditions
• Identify how variability and extremes can be included using ranges, not just one year’s results+ Show more

Learning Objectives

• Explain what balanced forces are and how they affect an object's motion.
• Identify examples of balanced forces in everyday situations.
• Describe how net force relates to whether an object stays at rest or moves steadily.

Learning Objectives

• Identify major flower parts and describe what roles sepals, petals, stamens, and pistils play in reproduction
• Explain how pollen is produced, how stigma receives pollen, and how fertilization leads to seeds
• Compare wind pollination and animal pollination and describe how nectar, scent, and color can help pollinators

Learning Objectives

• Identify common weather elements such as temperature, precipitation, cloud cover, and wind.
• Explain how weather measurements are recorded and used to look for patterns over time.
• Use weather data to answer questions about short-term conditions and possible seasonal changes.

Learning Objectives

• Identify the different components that make up soil.
• Understand how particle sizes affect soil texture and drainage.
• Compare sandy, silty, and clay soils in terms of permeability and suitability for plants.+ Show more

Learning Objectives

• Understand how human activities affect soil quality.
• Identify practices that help conserve soil health.
• Recognize environmental consequences of soil disturbance.+ Show more

Learning Objectives

• Identify safe tool-use practices that help people avoid injury and damage to materials.
• Explain why using the right tool for a task improves accuracy and results.
• Choose correct actions for an organized, safe workspace during building activities.+ Show more

Learning Objectives

• Identify an external structure on an animal or plant.
• Explain what the structure does in the life of the organism.
• Use clues from a reading passage to answer science questions.

Learning Objectives

• Identify the controlled variables in a fair test.
• Explain why keeping conditions the same helps results make sense.
• Connect test results to design improvements.

Learning Objectives

• Explain what a force is and that forces can act by touching or without touching.
• Identify how balanced forces keep an object’s motion the same.
• Describe how unbalanced forces change an object’s motion.

Learning Objectives

• Explain that magnets can attract and repel without touching
• Distinguish magnetic forces from contact forces like pushing and friction
• Describe how distance and pole orientation can change a magnet’s interaction strength

Learning Objectives

• Explain how weathering can break rocks into smaller pieces.
• Identify cause-and-effect relationships in a science text.
• Describe how small rock pieces can be moved later by water, wind, or ice.

Learning Objectives

• Identify inherited traits in a family by reading and observing similarities.
• Describe how variation can still happen even when traits are inherited.

Learning Objectives

• Identify the desired function of a design problem.
• Name measurable success measures for a design.
• Recognize constraints that can limit a solution.

Learning Objectives

• Use evidence from a text to make a reasoned claim about a solution for flood risk.
• Compare benefits and trade-offs of hazard solutions using details from a short passage.
• Explain why a chosen design would work better during strong rain in a specific setting.

Learning Objectives

• Identify criteria in a problem.
• Compare solution ideas using evidence from simple models.
• Use measurements and observations to explain trade-offs.

Learning Objectives

• Identify the main idea of a science passage about group survival.
• Find key details that explain how groups help organisms survive.
• Use evidence from the passage to answer questions about traits and resources.

Learning Objectives

• Identify a repeating motion pattern using time comparisons.
• Use distance and time ideas to describe how rolling motion changes.
• Predict what might happen next in a rolling motion pattern.

Learning Objectives

• Explain how root structures help plants take in water
• Identify evidence that links form (root features) to function (water uptake)
• Describe cause-and-effect relationships in plant survival

Learning Objectives

• Identify the main idea and key details from a short weather-data description.
• Use notes and simple data to describe daily weather changes.
• Explain how clouds and temperature can vary from day to day.

Learning Objectives

• Explain how balanced forces can result in no change in motion
• Predict whether an object will stay at rest or move, based on net influence
• Describe how a stronger pull or push can change an object's speed or direction

Learning Objectives

• Explain how forces combine to create a net effect on an object’s motion
• Use directional arrows and qualitative magnitude words (stronger/weaker) to predict net direction
• Identify when forces add, reduce, or cancel each other

Learning Objectives

• Explain how rigid and pin connections differ in how they transfer loads.
• Describe how fasteners and adhesives affect joint stiffness and stability.
• Identify factors in joint design that influence stress concentration and joint failure.

Learning Objectives

• Explain how a sloped surface changes an object's tendency to move by comparing the gravity component along the slope to the force of friction.
• Compare how gentle and steep inclines affect how fast a sliding or rolling object tends to move downward.
• Use examples of sliding or rolling objects on slopes to predict motion on different incline angles.

Learning Objectives

• Use qualitative cause-and-effect reasoning to predict what happens when an influence changes
• Describe how slope and added influences affect the speed and direction of an object’s motion
• Explain predictions using clear directional and comparative language

Learning Objectives

• Explain how soil pore size and structure affect water drainage and water retention
• Describe how aeration and oxygen supply help roots grow and take in nutrients
• Compare loam, clay, and sandy soils using trade-offs among retention, drainage, and root oxygen

Learning Objectives

• Identify different seed dispersal strategies such as wind, animal, water, and ballistic ejection.
• Explain why dispersal helps plants colonize new areas over generations.
• Describe how dispersal patterns can affect gene flow and the spatial distribution of plant populations.

Learning Objectives

• Describe steady-speed motion and changing-speed motion using distance-over-time ideas
• Use relative language or simple ratios to explain which object is moving faster
• Interpret short distance-over-time records to order motions and estimate which is faster+ Show more

Learning Objectives

• Explain how human activities can reduce soil quality and cause erosion, compaction, nutrient loss, and pollution.
• Describe how conservation actions like keeping ground cover and reducing disturbance help protect soil and water.
• Connect soil health to food production, water quality, and ecosystem resilience.

Learning Objectives

• Identify how material properties such as density, stiffness, tensile strength, compressive strength, brittleness, and corrosion resistance affect structural stability.
• Match common construction materials to key property descriptions and choose the best material for a given load or environment.
• Explain, using evidence from a short passage, how material choice involves trade-offs among strength, durability, weight, and cost.

Learning Objectives

• Describe how xylem moves water using transpiration pull and how phloem moves sugars to support plant growth.
• Compare herbaceous and woody stems, including vascular bundle arrangement and secondary growth in trees.
• Explain how lignified tissues strengthen stems and how structure helps plants handle mechanical stress.

Learning Objectives

• Identify common types of loads on structures, including dead and live loads, and point and distributed loads
• Explain how compression, tension, bending, and shear forces affect beams, columns, and arches
• Match structural members to the main internal reactions they experience

Learning Objectives

• Identify common structural forms (arches, beams, frames) and describe how their shapes help carry loads.
• Compare compressive and bending behavior using simple, real-world construction examples.
• Explain how span and connections affect strength and stability in basic structures.

Learning Objectives

• Compare fibrous and taproot root systems and explain how each helps a plant survive.
• Describe how root hairs and mycorrhizal associations improve water and nutrient uptake.
• Explain how storage and aerial roots support plant survival in different environments.+ Show more

Learning Objectives

• Explain how soil, light, water, temperature, and nutrients affect germination and plant growth
• Describe how soil compaction and salinity can reduce plant survival
• Use real-world examples to show how agricultural practices like crop rotation and irrigation change where plants can grow

Learning Objectives

• Identify key parts of soil and describe how they affect plant growth
• Compare sand, silt, and clay based on particle size and water behavior
• Explain how pore space, air, and organic matter affect soil aeration and nutrients