Grade 3 Science Worksheets

Learning Objectives

• Understand how to plan and conduct fair tests for prototypes.
• Identify variables, failure points, and design modifications in testing.
• Record and analyze outcomes to improve project performance.+ Show more

Learning Objectives

• Understand how soil properties affect water retention, drainage, and aeration.
• Identify the differences among loam, clay, and sandy soils in terms of plant suitability.
• Explain how soil structure influences plant growth and nutrient uptake.+ Show more

Learning Objectives

• Understand environmental factors that affect the strength and stiffness of materials over time.
• Identify different types of material decay such as moisture damage, corrosion, and ultraviolet degradation.
• Learn how maintenance, protective treatments, and material choice influence the lifespan of structures.+ 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

• Explain why shadows form when objects block light along its path
• Describe how light creates darker regions behind an object
• Compare how opaque, transparent, and translucent materials affect what we can see+ Show more

Learning Objectives

• Explain how science models help us understand ideas that are too big, too small, or not directly visible.
• Use models to identify relationships and make cause-and-effect predictions.
• Select evidence that supports a model and describe how the model helps explain observations.

Learning Objectives

• Describe how matter can change state when thermal energy is added or removed
• Compare what happens to solids, liquids, and gases during melting, freezing, evaporation, and condensation
• Explain how shape, volume behavior, and flow help identify different states of matter

Learning Objectives

• Explain how an organism’s survival needs can change as it grows and develops.
• Describe examples of changing needs in plants and animals at different life stages.
• Use evidence from a text to identify relationships between growth and resources.

Learning Objectives

• Explain how classification rules use visible traits to group organisms clearly.
• Use a step-by-step set of features to place organisms into the correct group.
• Evaluate whether a new organism fits a group by checking the same rule features.

Learning Objectives

• Explain how scientists use evidence to check whether a model’s predictions match observed results.
• Describe how evidence can support or challenge a model.
• Revise a scientific explanation so it fits both the model and the evidence.

Learning Objectives

• Explain how temperature and water vapor help form clouds
• Describe how condensation can lead to precipitation (rain or snow)
• Use observations of cloudiness and timing to connect weather to water’s changing forms

Learning Objectives

• Explain how Earth’s rotation causes day and night.
• Describe how sunlight reaches the side of Earth facing the Sun.
• Recognize that Earth’s motion, not the Sun’s motion, creates the daily cycle.

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

• 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 how predators and prey depend on each other within an ecosystem.
• Describe how changes in prey population can affect predator survival and behavior.
• Use evidence to support how food and shelter needs connect different organisms in a habitat.

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

• Explain how Earth’s tilt causes changes in the amount of daylight across the year
• Describe how Earth’s rotation creates the daily cycle of day and night
• Use observations of day length to connect time of year with seasonal daylight

Learning Objectives

• Explain how an evidence-supported claim connects a question to observations or results.
• Identify evidence types such as comparisons, repeated observations, and patterns over time.
• Revise an explanation so that it matches gathered evidence instead of personal opinion.

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 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

• Explain how the properties of rocks and soil make them useful for different jobs.
• Compare how rocks and soil behave with water and movement in the environment.
• Use evidence from a text to match materials to human-built and natural uses.

Learning Objectives

• Explain how weathering slowly changes rocks and soil
• Identify patterns in weathering caused by wind, water, sunlight, and temperature changes
• Distinguish weathering from weather

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

• Explain how plants get water, minerals, air, and light to survive.
• Describe how animals get food, water, air, and shelter to survive.
• Compare how different species can use different body structures to meet the same needs.

Learning Objectives

• Explain how observations and measurements can be organized into clear representations like tally tables and bar graphs.
• Use correct labels and an appropriate scale to make data in a representation easier to compare.
• Identify patterns and comparisons in data representations and explain what they show.

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 observable weather conditions such as temperature, precipitation, and wind.
• Describe how weather can change from day to day using measurements and everyday observations.
• Compare weather conditions across multiple days to notice patterns.

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 what a classification rule is and why it must be based on observable features.
• Use visible traits (such as body covering, leaf shape, number of legs, or seed coat) to group organisms.
• Compare two organisms by describing similarities and differences using shared observable features.

Learning Objectives

• Explain how a force can cause an object to vibrate
• Describe how vibration size affects the loudness of sound
• Identify how sound travels through a medium

Learning Objectives

• Explain how living things in a simple ecosystem are connected through food and habitat needs.
• Identify producers, consumers, and predators/prey relationships in a shared habitat.
• Describe how animals and plants affect each other through seed spreading and growth.

Learning Objectives

• Explain that organisms go through distinct life cycle stages (such as germination, growth, and adulthood).
• Describe how an organism’s needs change from one life cycle stage to another.
• Use examples to connect life cycle stages to how populations continue from one generation to the next.

Learning Objectives

• Explain that many light paths can be described as straight lines.
• Identify how light behaves when it meets an opening, a barrier, or an edge.
• Use evidence from simple observations to describe where light can and cannot reach.

Learning Objectives

• Explain how gases spread out to fill the space of their container.
• Describe how gas behavior changes when the container space changes.
• Identify key properties of gases, including having no fixed shape and taking up the container’s volume.+ Show more

Learning Objectives

• Identify the major stages of metamorphosis in monarch/butterflies and frogs
• Explain how an animal’s structures and behaviors change from one stage to the next
• Use science vocabulary related to life cycles to answer questions accurately+ Show more

Learning Objectives

• Identify living components of an ecosystem (producers, consumers, and decomposers).
• Describe how nonliving factors (sunlight, air, water, soil, temperature, moisture, and space) affect organisms.
• Explain how changes in one part of an ecosystem can affect other organisms.

Learning Objectives

• Explain how scientists use measurements to compare properties of matter.
• Identify what mass, volume, temperature, and size measurements describe.
• Use appropriate units and measurement tools to support fair comparisons.

Learning Objectives

• Describe how life cycles progress through stages from early growth to adulthood
• Compare plant life cycles (seed-to-seed) with animal life cycles (youth stages and adult stages)
• Explain how different life cycle stages help organisms survive, grow, and reproduce

Learning Objectives

• Explain how animal body structures help them survive in their environments.
• Identify how body coverings, limbs, and other protective features support movement and safety.
• Use evidence from short texts to describe the main idea about adaptations.

Learning Objectives

• Identify the main stages of a flowering plant’s life cycle from seed to new seeds.
• Explain how germination, growth, and reproduction help plants continue their species.
• Describe how plant structures (roots, leaves, stems, flowers, fruit, seeds) support survival in a local environment.

Learning Objectives

• Explain how energy and matter move through an ecosystem using producers, consumers, and decomposers.
• Identify relationships in simple food chains and describe how changes in one organism can affect others.
• Use evidence from a passage to determine main ideas and evaluate statements about food relationships.

Learning Objectives

• Make reasoned claims about how design solutions reduce impacts of weather-related hazards.
• Use observational evidence, simple models, and community-style maps to compare the effectiveness of hazard solutions.
• Explain trade-offs (cost, durability, and local topography) when choosing among hazard-reduction designs.

Learning Objectives

• Identify observable features (such as body covering, leaf shape, number of legs, and seed coat type) used to classify organisms.
• Use simple, consistent classification rules that are based on visible traits.
• Compare organisms by describing how they are similar or different using shared observable features.+ Show more

Learning Objectives

• Explain the basic survival needs of plants and describe how plants get them from the environment.
• Describe the basic survival needs of animals and give examples of how animals meet those needs.
• Compare how different body structures help plants and animals access the same basic needs.+ Show more

Learning Objectives

• Define design criteria and explain how they guide engineering decisions.
• Identify success measures and constraints in a design problem.
• Describe trade-offs when multiple requirements compete.

Learning Objectives

• Identify common external and internal structures of plants and animals
• Explain how structures help organisms survive, grow, and reproduce
• Use models or drawings to show how body parts are arranged and connected

Learning Objectives

• Explain how distance and elapsed time help describe motion.
• Use consistent units (such as metres and seconds) to record motion accurately.
• Compare speeds using simple numerical information from measurements.+ 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.