Grade 6 Science Worksheets

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

• Describe how habitat fragmentation creates isolated habitat patches and reduces effective habitat area
• Explain how fragmentation can increase edge effects and limit movement between populations
• Identify ways corridors and habitat preservation can reduce negative impacts+ 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

• Explain how different types of pollution enter ecosystems and affect living things
• Describe processes such as bioaccumulation, biomagnification, and eutrophication
• Identify evidence of ecosystem damage caused by pollutants, including dead zones+ Show more

Learning Objectives

• Explain how birth and death rates, immigration, and emigration affect population size over time
• Differentiate exponential growth from logistic growth using the ideas of resources and carrying capacity
• Identify how density-dependent and density-independent factors influence populations+ 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 chemical energy in food is transformed to power life processes in organisms.
• Describe energy transfer and the idea that energy changes form rather than being created or destroyed in the body.
• Connect chemical bond breaking to energy release and cellular work.+ Show more

Learning Objectives

• Explain how food molecules provide building materials and stored energy in the body.
• Describe how digestion breaks large food molecules into smaller molecules for absorption.
• Identify examples of different food molecules (carbohydrates, proteins, fats) and the body uses they support.

Learning Objectives

• Explain how energy moves through an ecosystem using trophic levels and feeding relationships in a food web
• Describe the roles of producers, consumers, and decomposers in transferring energy and cycling matter
• Interpret how multiple energy pathways differ from a single food chain

Learning Objectives

• Explain how carbon atoms cycle through an ecosystem, including photosynthesis, feeding, respiration, and decomposition.
• Distinguish between the flow of energy through trophic pathways and the conservation of matter.
• Identify reservoirs and processes that move matter between air, water, and living organisms.

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

• Identify producers, consumers, and decomposers in food webs and explain how each gets energy.
• Describe how energy decreases across trophic levels and how matter cycles through decomposers.
• Use food-web relationships to predict the effects of removing or increasing a species.

Learning Objectives

• Explain how atoms of multiple elements combine in fixed proportions to form compounds
• Use particle models to identify which element counts appear in a compound
• Relate the atomic composition of a compound to observable properties such as density and chemical behavior

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

• 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 precipitation returns water to Earth and connects the atmosphere to the hydrosphere and geosphere.
• Describe how infiltration allows water to enter soil and how it can help recharge groundwater.
• Compare factors that increase infiltration versus factors that increase runoff.

Learning Objectives

• Explain how gravity moves water downhill through interconnected pathways in a watershed
• Describe how infiltration, storage, and surface cover affect runoff speed and erosion
• Use watershed-scale ideas to predict how upstream conditions influence downstream water+ Show more

Learning Objectives

• Explain how Earth’s water is stored in different reservoirs in different forms
• Describe how water moves between reservoirs when it changes state
• Use reservoir connections to predict how water availability changes over time

Learning Objectives

• Explain how scientists turn explanations into testable predictions that can be checked with observations.
• Identify evidence that supports or conflicts with a model and describe how mismatches lead to refining assumptions.
• Use measurement criteria and uncertainty language to evaluate results and compare predictions to new data.

Learning Objectives

• Explain the difference between structural and physiological adaptations and how each supports survival
• Link specific organism traits to advantages such as feeding, defense, camouflage, and reproduction
• Use natural selection ideas to describe how helpful traits can become more common over generations

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 how barrier defenses, innate inflammation, and adaptive immune responses work together
• Describe how the circulatory and lymphatic systems help immune cells respond to pathogens
• Use key vocabulary (antigens, lymph nodes, antibodies, memory cells) to support immune system explanations

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 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 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

• Identify the four main tissue types in multicellular animals and describe what each tissue type mainly does
• Match tissue types to their key functions and characteristic structures
• Explain how epithelial, connective, muscle, and nervous tissues work together in organs+ Show more

Learning Objectives

• Identify common circuit diagram symbols for sources, conductors, loads, and meters.
• Explain how voltage and current labels help interpret energy flow in a circuit.
• Translate a simple real-world electrical setup into a circuit diagram and compare configurations.

Learning Objectives

• Explain energy efficiency as the ratio of useful output energy to total input energy.
• Identify common sources of energy loss in machines, lighting, and heating.
• Use efficiency ideas to compare technologies and suggest practical improvements.

Learning Objectives

• Explain how energy is transferred by conduction, convection, and radiation
• Use examples to identify which energy-transfer process is occurring
• Describe how energy transfer affects temperature in everyday situations

Learning Objectives

• Explain what current, voltage, and power measure in an electric circuit
• Use relationships between voltage, current, power, and energy to interpret measurements
• Describe how energy use can be calculated over time and expressed in joules and kilowatt-hours+ Show more

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 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

• 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

• Identify common chemical indicators and connect them to evidence of chemical reactions.
• Distinguish evidence of chemical change from evidence of physical change.
• Use observations and reactant information to make stronger claims about chemical transformation.

Learning Objectives

• Explain how particle arrangement in crystalline solids differs from amorphous solids
• Describe how bonding strength and packing affect mechanical properties and melting behavior
• Connect microscopic structure to macroscopic observations such as brittleness and cleavage

Learning Objectives

• Explain gas pressure using the particle model (collisions and particle motion).
• Describe how temperature, particle speed, and volume affect gas pressure.
• Connect microscopic particle ideas to macroscopic examples such as tires and altitude.

Learning Objectives

• Differentiate heterogeneous mixtures from homogeneous mixtures (solutions) based on particle distribution
• Identify methods used to separate mixture components using physical properties
• Explain how solubility, density, and particle size affect separation and solution formation+ Show more

Learning Objectives

• Explain the law of conservation of mass for closed systems
• Identify reasons mass can appear to change in open systems
• Use the idea of system boundaries to interpret physical and chemical changes

Learning Objectives

• Explain how roles, shared documentation, and versioning improve teamwork in science investigations
• Use evidence-based critique to resolve conflicting observations during group work
• Apply peer review and standardized reporting templates to make results transparent and reproducible+ Show more

Learning Objectives

• Explain the difference between a habitat and a niche using examples.
• Describe how overlapping niches can lead to competition and how resource partitioning can support coexistence.
• Use niche and habitat ideas to predict how species distributions may change when resources or conditions shift.

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

• Identify the roles of producers and consumers in a food web
• Explain how energy moves through trophic levels and why it decreases
• Classify organisms as primary, secondary, or higher-level consumers+ Show more

Learning Objectives

• Distinguish primary succession from secondary succession based on the presence of soil and type of disturbance
• Explain how pioneer species change an environment and enable later species to establish
• Describe how succession affects biodiversity, habitat structure, and community dynamics

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 cellular respiration converts energy in food into usable energy for cells
• Describe the roles of oxygen and waste products during cellular respiration
• Connect cellular respiration to matter and gas exchange between organisms and their environment+ Show more

Learning Objectives

• Explain how competition occurs when organisms need limited resources
• Describe direct and indirect competition and how each can affect survival
• Connect changes in resource availability to changes in population size+ Show more

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.