Grade 3 Science Worksheets

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 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 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 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 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 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

• Describe the main stages in a plant life cycle from seed to adult plant.
• Explain how water and air help a seed during early germination.
• Explain how light helps an adult plant make energy and grow leaves.

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

• Identify observable physical properties of matter such as color, shape, size, and texture
• Compare objects made from different materials using clear, reliable observations
• Explain how observations help scientists describe and classify materials without changing them+ Show more

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

• Identify key parts of daily weather observations, such as temperature, precipitation, and wind.
• Use daily weather measurements to compare what happens from one day to the next.
• Explain how observable weather conditions affect daily life.

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

• 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

• 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 plant parts (roots, stems, leaves, and flowers) in a vascular plant.
• Describe how each plant part helps the plant survive, grow, and reproduce.
• Connect specific examples (taproots, woody stems, broad leaves, composite flowers) to the functions of plant organs.

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 equal forces in opposite directions can balance to keep an object’s motion unchanged
• Predict whether an object will remain at rest or change speed or direction based on net influence
• Describe net influence as the combined effect of all forces acting at the same time

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

• 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

• 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

• 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 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 that light often travels in straight lines and describe light paths using arrows or lines.
• Identify how openings, edges, and shadows show the direction of light travel.
• Use vocabulary related to light paths (straight line, shadow, opening, blocked).

Learning Objectives

• Use cause-and-effect reasoning to predict how changes in a situation can change outcomes.
• Explain directional influences (increase/decrease) and speed-related consequences using scientific language.
• Compare two scenarios and justify which one will produce a faster, slower, or different result.+ Show more

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

• Identify everyday examples of water phase changes caused by heating and cooling
• Explain how melting, freezing, evaporation, and condensation describe changes between states of matter
• Connect temperature/heat energy to visible changes in water (solid, liquid, gas)

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

• Explain what a habitat is and how it provides shelter, food, and water for living things.
• Describe how different habitats (forest, pond, field) meet the needs of organisms.
• Identify the role of physical surroundings and resources in helping organisms survive.+ Show more

Learning Objectives

• Identify major life cycle stages of common organisms and explain what happens in each stage.
• Describe how needs (food, shelter, and environment) can change from a young stage to an adult stage.
• Explain how life cycles help populations continue from one generation to the next.

Learning Objectives

• Identify the main stages of metamorphosis in insects: egg, larva, pupa, and adult.
• Explain how each stage’s body form helps an organism meet its needs.
• Use vocabulary (larva, pupa, adult) to describe life cycle changes.

Learning Objectives

• Compare motions by interpreting distance-over-time information.
• Identify steady-speed motion versus changing-speed motion using simple data.
• Use numerical ratios and relative language (faster, slower, same speed) to describe which object moves more quickly.

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

• Explain how predators and prey depend on each other within an ecosystem.
• Identify how changes in prey numbers can affect predator survival.
• Describe how prey need habitat and plant life for food and shelter.

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 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

• 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

• Describe how friction affects the motion of objects
• Explain how surface roughness and material change the strength of friction
• Identify everyday examples where friction helps or slows movement

Learning Objectives

• Identify patterns in motion by comparing distance and time for an object
• Describe how friction can cause objects to slow down and how slopes can change speed
• Use simple measurements to make predictions about future motion

Learning Objectives

• Explain how balanced forces help an object stay at rest.
• Describe what happens when unbalanced forces act on an object.
• Use force-and-motion ideas to interpret everyday situations.

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

• Identify common structural forms (arches, beams, frames) and describe how their shapes help them support loads.
• Explain how compressive and bending forces affect different structures in real-world examples.
• Compare span, curvature, and connection types to predict strength and stability.

Learning Objectives

• Explain how pitch is connected to the speed of vibrations.
• Explain how loudness is connected to the strength of vibrations.
• Use examples (strings, drums) to distinguish pitch from loudness.

Learning Objectives

• Identify pushes and pulls as forces that act on objects with a direction
• Describe how forces can start, stop, or change motion
• Use arrows and basic ideas of net force to predict what happens to an object

Learning Objectives

• Explain how temperature affects water vapor and cloud formation
• Describe how condensation and gravity lead to precipitation
• Use observations of weather to connect clouds with when rain (or snow) happens

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

• Compare rocks and soil using appearance and physical properties.
• Explain how rock and soil can be separated or changed by pressure and handling.
• Describe how soil is made from smaller particles and organic matter.

Learning Objectives

• Explain how fair tests control variables to learn whether a prototype change improves results.
• Identify possible failure modes in a prototype and describe how test outcomes guide design modifications.
• Use recorded observations to compare test results from the original model and an improved version.