Grade 8 Science Worksheets

Learning Objectives

• Explain how kinetic energy depends on speed and mass using real-world examples.
• Describe how gravitational potential energy depends on height relative to a reference level.
• Interpret simple data and graphs that relate speed or height to changes in stored energy.+ Show more

Learning Objectives

• Describe how herbivores, omnivores, and carnivores fit into trophic positions in food chains.
• Explain how feeding relationships affect energy transfer through a community.
• Compare how omnivory can blur discrete trophic levels compared with strict herbivory or carnivory.+ Show more

Learning Objectives

• Identify chloroplast regions involved in the stages of photosynthesis
• Explain how electron transport supports ATP and NADPH production
• Describe how ATP and NADPH support carbon fixation+ Show more

Learning Objectives

• Explain how plate tectonics accounts for continental drift, mountain building, volcanism, and sea-floor spreading
• Distinguish convergent, divergent, and transform plate boundaries and relate each to common landforms and hazards
• Connect heat transfer and mantle convection to subduction and long-term crustal recycling

Learning Objectives

• Compare lines of evidence (fossils, anatomy, embryology, and DNA) to infer common ancestry.
• Explain how homologous structures and conserved developmental stages support evolutionary relationships.
• Interpret fossil and molecular patterns to distinguish unity from diversity over deep time.

Learning Objectives

• Distinguish density-dependent from density-independent factors that change population size
• Explain how competition, disease transmission, and social behavior act as density-dependent regulators
• Describe how weather events and habitat fragmentation can affect populations through density-independent or altered density effects

Learning Objectives

• Explain the major processes of the water cycle, including evaporation, condensation, and precipitation.
• Describe how gravity and the Sun drive movement of water through Earth’s systems.
• Use evidence to connect water cycle processes to weather, climate, and habitats.

Learning Objectives

• Identify different types of fossils found in sedimentary rock layers
• Understand what fossils reveal about Earth's ancient environments
• Explore how fossil similarities across regions indicate historical connections+ Show more

Learning Objectives

• Understand how mineral, energy, and groundwater resources form
• Identify geological processes such as plate tectonics, sedimentation, metamorphism, and aquifer formation
• Analyze examples of resource reservoirs like sedimentary basins, oil traps, and aquifers+ Show more

Learning Objectives

• Explain how centripetal force is directed toward the center of a curved path
• Identify how speed, radius, and mass affect the required centripetal force
• Use force-balance reasoning to predict drift when the inward force is insufficient+ Show more

Learning Objectives

• Understand how multiple organ systems coordinate to maintain homeostasis.
• Identify key interactions between respiratory, circulatory, excretory, and endocrine systems.
• Explain the role of cellular structures and signaling in systemic responses.+ Show more

Learning Objectives

• Understand the importance of water reservoirs in global water distribution.
• Identify main ideas from a scientific passage about water reservoirs.
• Develop reading comprehension skills related to environmental science topics.

Learning Objectives

• Explain how criteria guide comparisons between competing design concepts
• Distinguish qualitative from quantitative evidence in design evaluation
• Describe benefits and limitations using trade-off reasoning+ Show more

Learning Objectives

• Explain how aerodynamic drag opposes motion through air as speed increases
• Analyze how vehicle or turbine shape choices change net force and efficiency
• Use drag-related vocabulary to describe practical design decisions

Learning Objectives

• Calculate density using mass and volume and report the correct units.
• Use displacement and overflow ideas to measure the volume of irregular solids.
• Explain how measurement uncertainty, significant figures, trapped air, and temperature can cause density discrepancies.

Learning Objectives

• Identify patterns in historical and instrumental natural hazard data
• Compare hazard magnitude and frequency to explain community risk
• Interpret recurrence intervals in natural hazard data+ Show more

Learning Objectives

• Explain how species interactions such as competition, predation, mutualism, commensalism, and parasitism affect survival and reproduction.
• Describe how interaction outcomes can shift population sizes and influence ecosystem stability.
• Use examples to distinguish mutualism, commensalism, and parasitism based on who benefits and who is harmed.

Learning Objectives

• Explain what invasive species are and how they enter communities.
• Describe the ways invasive species disrupt native ecosystems.
• Identify the impacts of invasive species on energy transfer and nutrient cycles.+ Show more

Learning Objectives

• Understand what fossils are and how they are formed.
• Learn why fossils are important for studying Earth's history.
• Identify how fossils provide evidence for evolution.+ Show more

Learning Objectives

• Analyze how air mass motions influence weather changes using observational datasets.
• Explain the processes of frontogenesis and cyclogenesis in weather systems.
• Identify the interactions between polar, tropical, and maritime air masses and their effects on weather.+ Show more

Learning Objectives

• Model population change using exponential growth concepts
• Interpret population graphs for growth and steady states
• Explain how limiting factors affect population size+ Show more

Learning Objectives

• Describe how negative feedback maintains internal stability
• Explain how positive feedback amplifies an initial change
• Identify sensors and effectors in homeostatic control systems+ Show more

Learning Objectives

• Explain biodiversity at genetic, species, and ecosystem levels and how each level contributes to ecosystem function.
• Describe how scientists measure biodiversity and use biodiversity to evaluate ecosystem services.
• Apply conservation strategies (protected areas, habitat connectivity, and restoration) to real-world scenarios.+ Show more

Learning Objectives

• Identify different types of energy involved in physical processes
• Describe how energy transforms from one form to another
• Illustrate real-life examples of energy transfer and transformation

Learning Objectives

• Explain the roles of thylakoid membranes and the stroma in photosynthesis.
• Describe how light-dependent reactions produce ATP and NADPH that power the Calvin cycle.
• Model how carbon fixation leads to sugar and biomass formation in plants and algae.+ Show more

Learning Objectives

• Explain how the hydrologic cycle moves water through a watershed
• Describe groundwater–surface exchange and its effect on contaminant transport
• Identify how watershed connectivity influences water quality+ Show more

Learning Objectives

• Analyze test results to identify performance trends across design cycles
• Compare iterative modifications using graphs and simple calculations
• Select design characteristics while considering performance trade-offs+ Show more

Learning Objectives

• Describe how water potential determines water movement across membranes
• Compare plant and animal cells in different tonicities
• Explain how turgor pressure changes in plant cells+ Show more

Learning Objectives

• Apply weighted scoring to prioritize competing design criteria
• Compare design options using Pareto-style reasoning
• Estimate costs and benefits using stated assumptions+ Show more

Learning Objectives

• Explain how force and displacement connect to work on a moving object
• Describe how work can change an object’s kinetic and potential energy
• Use examples to identify when energy is transferred by work

Learning Objectives

• Use particle models to explain why atoms are rearranged but conserved during chemical reactions.
• Identify reaction evidence (color change, precipitate, gas formation) that indicates new substances form.
• Explain how conservation of matter applies to closed systems using mass relationships.

Learning Objectives

• Explain how resistance and current behave in series and parallel circuits
• Predict how voltage is distributed across components in series versus parallel arrangements
• Use circuit rules to anticipate brightness and power outcomes in real-world devices

Learning Objectives

• Explain how plate tectonics create mineral and energy resource deposits
• Describe how sedimentation affects resource deposits in specific settings
• Compare confined and unconfined aquifers across different regions+ Show more

Learning Objectives

• Understand the components and functions of innate immune mechanisms
• Identify cellular players involved in the first line of defense
• Explain processes such as phagocytosis and antibody production+ Show more

Learning Objectives

• Distinguish between endothermic and exothermic reactions using energy transfer and temperature evidence
• Explain energy changes using a particle and bonding model (kinetic energy, bond breaking, and bond forming)
• Predict whether a reaction is endothermic or exothermic based on observed temperature changes

Learning Objectives

• Explain how energy is transformed between potential, kinetic, electrical, and thermal forms within a system
• Use conservation of energy to describe why energy changes form even when motion increases or decreases
• Identify real-life examples of energy transformations, including bouncing balls, electric motors, and friction heating

Learning Objectives

• Identify appropriate graph types (scatter plot, line graph, bar graph) for different kinds of relationships in data.
• Interpret graphs by using labeled axes, units, and consistent numerical scales to avoid misleading conclusions.
• Explain how models summarize data patterns without introducing new variables.+ Show more

Learning Objectives

• Understand the basic structure of atoms and how they form molecules.
• Recognize how atoms bond and arrange to create different substances.
• Explain the conservation of atoms during chemical reactions.+ Show more

Learning Objectives

• Understand how climate variability affects water systems such as precipitation, snowpack, and runoff.
• Identify the consequences of changing climate patterns on flood frequency, drought, and groundwater recharge.
• Analyze the interaction between land use change and regional hydrology under climatic changes.+ Show more

Learning Objectives

• Describe the main stages of aerobic respiration: glycolysis, Krebs cycle, and oxidative phosphorylation.
• Explain how mitochondria produce ATP through membrane-based proton gradients and chemiosmosis.
• Compare aerobic respiration and anaerobic fermentation pathways in terms of energy yield and process.+ Show more

Learning Objectives

• Identify dominant and recessive alleles in pea plant traits.
• Understand how simple patterns predict trait inheritance.
• Interpret Punnett squares and phenotypic ratios.+ Show more

Learning Objectives

• Understand the stages of cellular energy production: glycolysis, Krebs cycle, and oxidative phosphorylation.
• Describe the role of mitochondria in ATP generation.
• Explain the differences between aerobic and anaerobic energy pathways.+ Show more

Learning Objectives

• Describe the mechanisms of heat transfer: conduction, convection, and radiation.
• Explain how energy transfer affects temperature changement in different materials.
• Identify examples of energy transfer in real-world thermal processes and phase changes.+ Show more

Learning Objectives

• Explain how human land use and resource extraction can change habitat structure and species interactions in Alberta landscapes.
• Describe how human actions can alter nutrient cycles and water quality in river systems.
• Evaluate mitigation strategies such as reclamation, protected areas, and land-management planning.

Learning Objectives

• Identify major energy forms in mechanical systems, with emphasis on kinetic and potential energy
• Describe how energy transforms between gravitational potential and kinetic energy during motion
• Calculate and compare kinetic and gravitational potential energy using given relationships+ Show more

Learning Objectives

• Understand the concept of tradeoff analysis in engineering decision-making
• Identify common competing constraints such as performance, manufacturability, and sustainability
• Explore basic methods for prioritizing among conflicting project requirements+ Show more

Learning Objectives

• Identify observable evidence indicating chemical or physical changes.
• Distinguish between chemical and physical changes based on observable signs.
• Recognize common examples of chemical and physical changes in everyday life.+ Show more

Learning Objectives

• Explain how DNA coding sequences relate to proteins and traits
• Describe transcription and translation as steps in protein production
• Predict how point mutations can change amino acid sequences+ Show more