Grade 6 Worksheets

Learning Objectives

• Explain how observable characteristics are used to group organisms in science.
• Use a dichotomous key to identify organisms using step-by-step choices.
• Describe how hierarchical classification categories lead from kingdom to species.+ Show more

Learning Objectives

• Explain the difference between fundamental and realized niches using measurable environmental factors.
• Describe how abiotic factors and interspecific interactions influence resource use and habitat occupation.
• Use examples to explain niche partitioning in space and time among similar species.+ Show more

Learning Objectives

• Explain how environmental conditions affect which traits help organisms survive and reproduce.
• Describe how natural selection can change trait frequencies in a population over generations.
• Connect adaptation to changes in which organisms are present in an ecosystem over time.

Learning Objectives

• Explain how heat transfer changes energy in matter and can change temperature.
• Describe how energy changes lead to phase changes such as melting, evaporation, and boiling.
• Use particle ideas to connect energy with the arrangement and motion of matter.

Learning Objectives

• Explain how free electrons in metals help electrical charge flow
• Describe how material composition and temperature affect conductivity
• Predict how cross-sectional area influences current and resistance in circuits+ Show more

Learning Objectives

• Explain how net force affects changes in speed and/or direction
• Distinguish between balanced forces and unbalanced forces using real-world examples
• Use key science terms (force, net force, balanced, unbalanced, friction, constant velocity)

Learning Objectives

• Explain how behavioral adaptations help organisms survive in changing environmental conditions
• Compare different types of behavioral adaptations (migration, hibernation, timing, nesting, burrowing)
• Use evidence from a text to determine main ideas about behavioral strategies+ Show more

Learning Objectives

• Explain how ocean currents move water and transport heat around Earth.
• Identify how wind patterns and Earth’s rotation influence surface currents.
• Describe how warm and cold currents affect coastal climates compared with inland areas.

Learning Objectives

• Explain how balanced forces lead to a net force of zero and may keep an object’s motion the same
• Describe how unbalanced forces produce a net force that changes an object’s speed or direction
• Connect the direction of net force to the direction of resulting motion changes

Learning Objectives

• Explain how density relates mass and volume and why it is a useful property of matter
• Calculate density conceptually by comparing masses of equal volumes and predicting float/sink outcomes
• Describe how density can change when a material’s state or composition changes

Learning Objectives

• Explain how photosynthesis and cellular respiration transform energy and exchange gases in cells.
• Describe how diffusion moves materials across cell membranes using concentration gradients.
• Compare diffusion with transport mechanisms and explain why both are needed for cell survival.

Learning Objectives

• Match material properties (strength, water resistance, conductivity, porosity, durability) to real-world performance needs.
• Compare design options by considering trade-offs such as cost, availability, and ease of shaping.
• Explain how water filter design choices (membrane thickness and pore size) affect contaminant reduction over time.

Learning Objectives

• Explain cause-and-effect relationships between predator and prey population changes in an ecosystem.
• Use evidence to describe how prey behaviors or traits can reduce predation success.
• Interpret food web interactions using appropriate scientific vocabulary such as predator, prey, and population density.

Learning Objectives

• Explain how angle of attack changes airflow patterns over an airfoil
• Describe how lift production relates to increasing angle of attack in both the linear and post-stall regimes
• Identify factors that shift the critical (stall) angle, including wing incidence, flap settings, and Reynolds number

Learning Objectives

• Identify and describe lift, drag, thrust, and weight and how each affects motion in flight.
• Explain weight as the force of gravity and connect thrust generation to propulsion systems.
• Use equilibrium ideas to describe steady level flight when forces balance.

Learning Objectives

• Explain how thermal energy is transferred by conduction, convection, and radiation
• Identify which mechanism of thermal energy transfer is occurring in everyday situations
• Use evidence from a text or scenario to support claims about heat transfer+ Show more

Learning Objectives

• Explain how uneven heating of Earth creates rising and sinking air that drives global wind patterns
• Describe how warm air behavior differs from cool air behavior in atmospheric circulation
• Connect atmospheric circulation to moisture transport and the development of storms+ Show more

Learning Objectives

• Identify safe lab behaviors and describe when personal protective equipment is needed during investigations.
• Use ethical reporting practices by recording accurate measurements, citing sources when appropriate, and explaining limitations.
• Match safety and reporting choices to real-world science classroom expectations.

Learning Objectives

• Explain how solar energy angle and location affect heating patterns on Earth.
• Describe how unequal heating drives air movement and ocean circulation.
• Connect energy transfers in the atmosphere and oceans to daily weather and seasonal climate changes.

Learning Objectives

• Explain what a trade-off decision means in a design problem.
• Identify how a design choice can improve one property while limiting another property.
• Connect material and physical properties (strength, insulation, friction, flexibility) to user needs and real-world constraints.+ Show more

Learning Objectives

• Explain how human activities can change habitats, nutrient cycles, and energy pathways in ecosystems.
• Describe how pollution and invasive species can affect organism health, reproduction, and biodiversity.
• Evaluate ecosystem services that may be reduced by human impacts, such as water filtration and pollination.

Learning Objectives

• Distinguish biotic components from abiotic factors in an ecosystem
• Explain how abiotic conditions (sunlight, water, soil, temperature, minerals) affect organisms
• Describe how interactions among biotic components influence growth, survival, and reproduction+ Show more

Learning Objectives

• Explain how trophic interactions (predation, herbivory, parasitism, competition, and mutualism) affect populations in an ecosystem
• Use evidence from scenarios to identify the type of trophic interaction and predict its likely impact
• Describe how energy and matter flow through ecological networks using food-chain and food-web ideas

Learning Objectives

• Explain how speakers, microphones, and cameras use wave interactions to transfer energy and information
• Describe how wave frequency and intensity affect device performance and fidelity
• Compare how sound waves and light waves are converted into electrical signals in technology

Learning Objectives

• Use particle models to distinguish physical changes from chemical reactions
• Explain how conservation of atoms supports particle-model explanations of matter changes
• Connect observable evidence of change (like new substances) to what particles do during reactions

Learning Objectives

• Explain how systems thinking considers inputs, outputs, pathways, and interacting components in a solution
• Use cause-and-effect reasoning to predict how changing one component can affect overall system performance
• Evaluate real-world design outcomes by tracing component roles within the larger system

Learning Objectives

• Explain how decomposers (fungi, bacteria, and detritivores) break down dead organic matter and return nutrients to ecosystems.
• Describe how environmental conditions (temperature, moisture, and oxygen) affect the rate of decomposition and nutrient cycling.
• Connect decomposition to nutrient availability for plants and to long-term ecosystem balance.

Learning Objectives

• Explain how photovoltaic, wind, and hydro systems transform one form of energy into electrical energy.
• Describe how energy losses (heat and friction) limit the net usable energy from renewable sources.
• Connect storage and conversion choices to conservation of energy and practical limits.

Learning Objectives

• Explain how limiting resources affect population size in an ecosystem
• Identify examples of limiting resources (nutrients, water, space) and describe their effects
• Use evidence from scenarios to predict how populations change when resources become scarce+ Show more

Learning Objectives

• Explain how gas exchange occurs between respiratory surfaces and blood using diffusion
• Describe how adaptations such as moist surfaces, large surface area, and airflow/ventilation improve respiratory efficiency
• Connect respiratory function to circulation and cellular respiration (oxygen delivery and carbon dioxide removal)

Learning Objectives

• Describe how the nervous system collects sensory information, processes signals, and produces responses.
• Explain how neurons transmit signals using electrical impulses and communicate at synapses using neurotransmitters.
• Connect how integration centers coordinate body responses and how nervous regulation works with endocrine signaling for stability.

Learning Objectives

• Explain how cells, tissues, organs, organ systems, and organisms relate to each other in levels of organization
• Use examples to show how changes at one level can affect higher levels of life
• Identify the main idea of passages about biological organization

Learning Objectives

• Describe how the heart pumps and how blood moves through arteries, veins, and capillaries.
• Explain how circulation delivers oxygen and nutrients and removes carbon dioxide and wastes.
• Identify how circulation supports thermoregulation and helps the immune system respond to infection.+ Show more

Learning Objectives

• Explain what a food web shows about energy flow and feeding relationships in an ecosystem.
• Describe how changes to one species can cascade through a food web.
• Use food-web vocabulary (producer, consumer, predator, prey, decomposer) to interpret relationships.+ Show more

Learning Objectives

• Identify physical properties of matter such as mass, volume, density, conductivity, melting point, and hardness
• Explain how physical changes differ from chemical changes using evidence from physical property observations
• Use measurements and descriptions to classify and compare materials based on physical properties

Learning Objectives

• Distinguish mixtures from compounds using particle models and descriptions of atomic arrangement
• Explain how physical separation methods relate to mixture composition
• Identify properties of compounds that result from consistent atomic bonding

Learning Objectives

• Explain how current and voltage behave differently in series versus parallel circuits
• Predict how changing a circuit arrangement affects brightness, energy flow, and circuit reliability
• Use basic circuit reasoning to determine what happens when a branch or component is broken

Learning Objectives

• Explain how decomposers break down dead organisms and waste in an ecosystem.
• Describe how atoms and nutrients move during decomposition and become available to producers again.
• Connect decomposition to ecosystem stability and the cycling of matter in soil and water.

Learning Objectives

• Explain how animals use matter from food to build and repair body tissues and organs.
• Describe how animals use energy from food to power life processes.
• Distinguish between matter that becomes part of the body and matter that leaves the body as waste or through breathing.+ Show more

Learning Objectives

• Explain how photosynthesis helps plants build new biomass using carbon-based molecules.
• Describe how carbohydrates can become cellulose and how other molecules become proteins and fats.
• Use evidence to support the idea that plant growth requires a continuous supply of matter and energy.

Learning Objectives

• Explain how invasive species spread and why they can grow rapidly in new environments
• Describe how invasive species can change food webs, habitats, and nutrient cycles
• Identify real-world impacts of invasive species on biodiversity and ecosystem services

Learning Objectives

• Describe reactants and products as the starting materials and the substances formed in a chemical reaction.
• Identify evidence that a chemical reaction occurred by comparing properties of reactants and products.
• Use particle diagrams to explain how atoms are rearranged during a reaction.+ Show more

Learning Objectives

• Explain how rocks, sediments, water, and living things are connected through material cycling
• Describe physical and chemical weathering as first steps in the cycling of Earth materials
• Use evidence from processes to explain how deposition and biological activity affect soil and landscapes+ Show more

Learning Objectives

• Use proportional reasoning to connect voltage, current, and resistance in simple circuits.
• Predict how changing resistance affects current when voltage stays constant.
• Apply proportional relationships to compare circuit behavior in series and parallel arrangements.+ Show more

Learning Objectives

• Use particle diagrams and atom counting to show that atoms of each element are conserved in a chemical reaction.
• Explain how rearranging atoms into new combinations can produce new substances without changing the total number of atoms of each element.
• Use evidence from reactant and product particle models to make accurate claims about reaction outcomes.

Learning Objectives

• Identify the four Earth system spheres: geosphere, hydrosphere, atmosphere, and biosphere.
• Explain how matter and energy move between Earth spheres using examples such as weathering and evaporation.
• Describe how gravity influences the movement of materials within and between spheres.+ Show more

Learning Objectives

• Explain how mechanical and chemical digestion work together in the mouth and stomach
• Describe how enzymes and acids help break down proteins, carbohydrates, and fats
• Explain how absorbed nutrients enter blood or lymph and support metabolism and growth+ Show more

Learning Objectives

• Explain how condensation forms when rising air cools and water vapor changes state
• Describe how cloud droplets and ice crystals collect to create clouds
• Connect cloud formation to precipitation timing and location