Grade 3 Science Worksheets

Learning Objectives

• Understand how living things are connected in a simple ecosystem.
• Identify relationships between predators, prey, plants, and animals.
• Learn how habitats support the survival of plants and animals.+ Show more

Learning Objectives

• Identify safe tool-use practices for measuring, joining, and shaping materials.
• Explain why using a tool for its intended purpose helps prevent accidents and improves results.
• Apply safety rules to a classroom tool-work scenario.

Learning Objectives

• Explain what a prototype is and why testing is important for improving a design
• Identify key observation criteria during prototype testing: strength, fit, stability, and function
• Compare testing results to the intended goal to decide what to improve in a design

Learning Objectives

• Explain how engineers help structures support forces without collapsing
• Identify how shape and connections (such as triangles and cross-bracing) improve stability
• Describe how testing shows whether a structure stays aligned and resists bending

Learning Objectives

• Explain why a science question must be testable and connected to evidence.
• Identify observations and measurements that can provide evidence for a question.
• Choose evidence-based results that match a testable plan.+ Show more

Learning Objectives

• Explain how a model represents ideas that are not directly visible or are too large or small to observe.
• Use models to identify cause-and-effect relationships suggested by evidence.
• Compare what a model shows with what real observations show to decide if the model helps explain them.

Learning Objectives

• Identify different data representations such as tally tables and bar graphs.
• Interpret labels, counts, and scales in simple graphs.
• Choose an appropriate representation to show patterns in data.+ Show more

Learning Objectives

• Explain that models make predictions and evidence can support or challenge them.
• Use observed patterns to decide whether evidence fits a model’s main idea.
• Revise a model-based explanation when new evidence does not match.

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

• Describe how moisture, corrosion, freeze-thaw cycles, and ultraviolet (UV) light can weaken materials over time.
• Explain how material durability affects strength and stiffness in structures.
• Identify maintenance actions and protective treatments that extend a structure’s reasonable lifespan.+ Show more

Learning Objectives

• Identify material properties that affect strength and stability (density, stiffness, tensile strength, compressive strength, brittleness).
• Compare common construction materials (wood, steel, concrete, and selected polymers) based on key properties.
• Connect material properties to real-world choices for loads, spans, connections, and durability.+ Show more

Learning Objectives

• Explain how an organism’s growth can change its survival needs.
• Identify how young vs. adult stages can require different resources within the same habitat.
• Use evidence from a text to determine main ideas about growth-related changes.

Learning Objectives

• Describe how infiltration, percolation, capillary rise, and runoff move water through soil
• Explain how soil texture and structure affect how quickly water moves and how long soil stays wet
• Use evidence from soil and land slope to predict where water will collect, drain, or flow on the surface

Learning Objectives

• Identify rigid and pin connection types and explain how they influence structural stiffness and stability.
• Describe how nails, bolts, welds, and adhesives transfer load through a joint.
• Explain how joint geometry, bearing area, and fastening method affect stress concentration and possible failure.

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

• Understand different ways to organize and represent data, such as drawings, tables, and graphs.
• Identify patterns and relationships within data displays like bar graphs and tally tables.
• Create simple data representations with accuracy and appropriate labels.+ Show more

Learning Objectives

• Explain what resistive forces are and how they oppose motion across surfaces.
• Describe how surface texture and material pairings influence ease of movement.
• Identify real-world examples showing the effects of different surfaces on friction.+ Show more

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

• Compare rocks and soil by appearance and by how they respond to pressure and handling.
• Describe how soil is made from smaller particles and organic matter, while rocks are usually solid pieces.
• Explain how properties of rocks and soil can affect where plants and water are found.

Learning Objectives

• Understand how models are evaluated by comparing evidence to their main ideas.
• Learn how observed results support or challenge scientific explanations.
• Explore examples of model testing, such as shadow shapes and light sources.+ Show more

Learning Objectives

• Understand how Earth's rotation and tilt affect day length across seasons.
• Identify observable changes in sunlight during different times of the year.
• Connect the position of the Sun in the sky with seasonal daylight patterns.+ Show more

Learning Objectives

• Use consistent units to describe how far an object moves
• Measure and compare elapsed time using seconds
• Calculate and compare simple speeds using distance and time+ Show more

Learning Objectives

• Understand what a prototype is and its purpose.
• Identify key criteria used to test prototypes such as strength, fit, stability, and function.
• Learn how to compare test results with design goals to evaluate a prototype.+ Show more

Learning Objectives

• Describe how moisture, corrosion, freeze-thaw cycles, and ultraviolet light can weaken structures over time
• Explain why protective treatments and maintenance help materials last longer
• Use cause-and-effect reasoning to choose materials with compatible durability for a given environment+ Show more

Learning Objectives

• Explain the difference between an opinion and an evidence-supported claim
• Use evidence to support a reasoning statement that answers a question
• Identify how comparisons and repeated observations strengthen explanations+ Show more

Learning Objectives

• Explain the difference between reflection and absorption when light reaches an object.
• Describe how shiny and dark surfaces change how bright an object looks.
• Use observations of brightness to predict whether an object reflects or absorbs more light.

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

• Describe how forces move from where they act to supports through structural members.
• Identify how axial force, bending moment, and shear can appear in beams and trusses.
• Explain what supports and foundations do when they receive combined loads.

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

• Understand the basic needs of plants and animals for survival.
• Identify resources plants and animals obtain from their environment.
• Describe how different species meet the same needs using different body structures.+ Show more

Learning Objectives

• Identify common simple machines and describe what each one changes about force or direction of motion
• Compare effort and force needs for different simple machines such as levers, pulleys, and inclined planes
• Use information about a machine to predict how it helps people do work

Learning Objectives

• Understand how simple forces cause objects to vibrate.
• Learn how vibrations produce sound and how sound travels through media.
• Identify different types of forces and their effects on objects.+ Show more

Learning Objectives

• Identify the main stages of metamorphosis: egg, larva, pupa, and adult.
• Explain how body form changes during metamorphosis to fit different needs.
• Describe how adult animals may require different resources than larvae.+ Show more

Learning Objectives

• Explain that sound is made by vibrating objects
• Describe how a vibrating object transfers energy to a medium that carries sound
• Identify examples of sound sources such as stretched strings and struck surfaces+ Show more

Learning Objectives

• Explain how water changes form (liquid, vapor, and solid) during the water cycle
• Describe the roles of evaporation, condensation, and precipitation in moving water through air, clouds, and the ground
• Use temperature changes to predict whether water will become vapor, liquid droplets, or ice

Learning Objectives

• Explain how simple machines help people do work by changing force or direction
• Identify examples of levers, pulleys, and inclined planes and describe what each one changes
• Use simple machine vocabulary (effort, load, force, direction) to answer science questions

Learning Objectives

• Understand how models represent ideas that are not directly visible.
• Identify different types of models like diagrams, physical representations, and drawings.
• Explain how models show relationships and cause-and-effect connections.+ 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

• Understand how multiple forces can combine to produce a net effect on an object.
• Identify scenarios where forces add, oppose, or dominate each other.
• Apply cause-and-effect reasoning to determine the result of combined forces.+ Show more

Learning Objectives

• Understand how heating and cooling cause observable phase changes in water.
• Identify examples of melting, freezing, evaporation, and condensation.
• Describe how the same material can appear in different states.+ Show more

Learning Objectives

• Compare annual, biennial, perennial, and woody plant life cycles by timing of germination, flowering, seed set, and dormancy.
• Explain how seed banking and seasonal cues help plant populations survive through unfavorable seasons.
• Describe how environmental variability and human land-use can favor certain life histories and affect population persistence.

Learning Objectives

• Understand different types of structural forms such as arches, beams, and frames.
• Identify how shape, span, and connection types affect the strength and stability of structures.
• Learn vocabulary related to compression, bending, and load distribution in structures.+ Show more

Learning Objectives

• Understand how objects reflect and absorb light.
• Identify the differences between shiny and dull surfaces.
• Observe how light interactions affect the appearance of objects.+ Show more

Learning Objectives

• Explain how vibrations produce sound.
• Identify common sound sources and describe how they vibrate.
• Classify sound effects using cause-and-effect reasoning.

Learning Objectives

• Identify examples of water changing phases when heated or cooled.
• Explain solid, liquid, and gas changes using everyday observations.
• Match phase changes (melting, freezing, evaporation, condensation) to states of matter.

Learning Objectives

• Identify sunny, rainy, windy, snowy, and stormy weather conditions
• Plot and read simple weather charts and monthly temperature graphs
• Compare weather and climate using graphic organizers+ Show more

Learning Objectives

• Identify major flower parts (sepals, petals, stamens, and pistils) and explain what each part does in reproduction
• Describe how pollen production, stigma reception, and fertilization lead to seed formation
• Compare wind pollination and animal pollination and explain how flower traits help attract pollinators+ Show more

Learning Objectives

• Understand how simple classification rules help organize organisms.
• Identify observable features used in classification.
• Apply classification rules to sort new organisms.+ Show more