Grade 8 Science Worksheets

Learning Objectives

• Explain how mixtures form and why their properties depend on the components
• Describe solutions as a type of uniform mixture (solute + solvent) and predict observable behavior
• Differentiate physical changes from chemical changes using evidence and particle-level reasoning

Learning Objectives

• Explain how scientific explanations connect evidence to causal mechanisms suggested by data
• Distinguish correlation from causation when interpreting experimental or observational results
• Use observations, patterns in measurements, and models to build and refine a complete scientific explanation+ Show more

Learning Objectives

• Explain how friction acts as a contact force that opposes relative motion between surfaces
• Describe how surface type and normal force affect the size of friction and the rate of slowing
• Connect friction effects to real-world examples such as bicycle brakes and sleds

Learning Objectives

• Understand the key safety features used in electrical system design.
• Identify environmental impacts associated with electrical energy sources.
• Evaluate safety and environmental trade-offs in electrical infrastructure.+ Show more

Learning Objectives

• Understand how predator-prey relationships influence population dynamics.
• Identify behavioral and community adaptations resulting from predation.
• Explain cascading effects caused by changes in top predator presence or recolonization.+ Show more

Learning Objectives

• Understand the processes involved in nutrient cycling within ecosystems.
• Identify the roles of decomposers, nitrogen fixation, and sedimentation in nutrient pathways.
• Analyze how environmental factors such as temperature and moisture influence nutrient cycling rates.+ Show more

Learning Objectives

• Understand the concept of electric charge and its properties.
• Distinguish between static electricity and current electricity.
• Identify real-world phenomena related to electric charge.+ Show more

Learning Objectives

• Explain how DNA stores hereditary information and is used as instructions inside cells
• Describe how genes and chromosomes relate to the production of proteins
• Connect DNA changes (mutations) to changes in protein production and inherited traits+ Show more

Learning Objectives

• Understand how particle motion, pressure, and temperature are interconnected in gases.
• Explain how changes in temperature can affect gas pressure and volume in closed systems.
• Describe real-world examples of gas behaviour, including atmospheric pressure variations and gas handling in agriculture.+ Show more

Learning Objectives

• Explain how genes and alleles determine inherited traits.
• Describe how parents pass alleles to offspring through reproduction.
• Use basic inheritance ideas to predict why siblings may share traits yet differ.

Learning Objectives

• Explain how limiting factors (food availability, predation, disease, and weather) affect population size over time.
• Describe carrying capacity and how populations behave when resources are limited.
• Use real-world examples to predict how changes in conditions can cause populations to grow, stabilize, or decline.

Learning Objectives

• Understand how particle theory applies to environmental processes.
• Classify chemical components and understand mass conservation principles.
• Interpret environmental systems such as nutrient cycling and contamination transport.+ Show more

Learning Objectives

• Identify the differences between physical and chemical changes based on evidence.
• Recognize examples of physical and chemical changes in everyday scenarios.
• Describe the energy transfer, color shifts, and gas production associated with chemical changes.+ Show more

Learning Objectives

• Explain how energy transfer during phase changes affects particle arrangement and motion
• Differentiate melting, freezing, evaporation, and condensation in terms of what happens to particles
• Identify which phase change involves energy being absorbed versus energy being released

Learning Objectives

• Describe the organization and functions of cellular membrane, cytoplasm, and organelles.
• Explain the roles of nucleus, mitochondrion, chloroplast, and other structures in maintaining cell function and homeostasis.
• Understand the relationship between membrane transport, compartmentalization, and overall cell activity.+ Show more

Learning Objectives

• Explain how mutations in DNA can change alleles and affect protein structure or function
• Identify common sources of mutations, including spontaneous copying errors and external factors like radiation
• Describe how natural selection can increase or decrease the frequency of traits caused by mutations

Learning Objectives

• Describe various separation techniques based on physical property differences.
• Explain how filtration, evaporation, distillation, and magnetic separation are used in different contexts.
• Identify examples of separation methods in local Alberta industries such as water treatment and mineral processing.+ Show more

Learning Objectives

• Identify and classify variables into independent, dependent, and controlled groups within experiments.
• Understand the importance of controls and procedural constraints in scientific investigations.
• Describe how to establish fair tests by appropriate variable management.+ Show more

Learning Objectives

• Explain how kinetic energy depends on speed and mass
• Explain how gravitational potential energy depends on height relative to a reference level
• Use simple relationships and graphs to predict how energy shifts during motion

Learning Objectives

• Understand the proportional relationship between force and displacement in springs and elastic materials.
• Identify real-world examples of elastic components in mechanical systems.
• Explain the concept of linear elastic behavior limits and the direction of restorative forces.+ Show more

Learning Objectives

• Describe the major tissue types: epithelial, connective, muscle, and nervous tissues, including cellular and extracellular components.
• Explain the structural and functional relationships within tissues such as contractility in muscle, synaptic connections in nervous tissue, and tensile strength in connective tissue.
• Illustrate how tissue-level arrangements contribute to organ functions like transport, movement, signaling, and support.

Learning Objectives

• Explain the law of conservation of energy in terms of energy transfer and transformation
• Identify where mechanical energy goes when friction slows an object
• Use energy accounting (before-and-after reasoning) to track energy changes in a system

Learning Objectives

• Understand the concept of conservation of mass in closed systems through experimental observations.
• Recognize that mass remains constant in sealed reactions despite internal changes.
• Learn how collecting gases in closed traps preserves mass measurements.+ Show more

Learning Objectives

• Understand the principles of measurement accuracy and instrument calibration.
• Estimate and interpret measurement uncertainties and errors.
• Apply concepts of significant figures and units in data recording.+ Show more

Learning Objectives

• Explain how reaction time and braking time combine to determine stopping distance.
• Describe how tire-road friction affects decelerating force and stopping distance in different road conditions.
• Compare how unbalanced forces and brake fade can increase the distance needed to stop.

Learning Objectives

• Explain why an object moving at constant speed can still require a net inward (centripetal) force
• Analyze how centripetal force depends on mass, speed, and turn radius
• Predict what happens when the inward force is insufficient during a turn

Learning Objectives

• Explain how intermolecular forces affect melting point, boiling point, and vapour pressure.
• Connect intermolecular forces to solubility by comparing attractions between different particles.
• Use real-world Alberta examples to describe how force strength influences phase change and evaporation.

Learning Objectives

• Explain how corrosion involves chemical change and forms new substances on materials.
• Describe how moisture and salinity (salt) influence the rate and location of corrosion.
• Identify evidence that corrosion has occurred, based on mass change and observable changes.+ Show more

Learning Objectives

• Describe how phase transitions change particle arrangement and energy without forming new substances
• Differentiate melting, freezing, vaporization, and condensation and identify the direction of energy flow
• Explain how phase transitions influence real-world systems such as river flow, snowpack melt timing, and condensation in cities

Learning Objectives

• Interpret temperature, precipitation, and storm-frequency data to identify long-term climate trends.
• Distinguish between short-term weather events and longer-term climate variability using evidence.
• Explain how El Niño and La Niña can shift rainfall patterns and influence climate indicators.

Learning Objectives

• Explain how adaptations help organisms survive in specific environments.
• Describe natural selection as a process involving variation, inheritance, and differential survival.
• Use evidence from an example to predict how traits may change over generations.

Learning Objectives

• Explain how the water cycle moves water through Earth systems (atmosphere, land, oceans, and organisms).
• Use cause-and-effect reasoning to describe how temperature and energy influence evaporation and precipitation.
• Compare natural water pathways (runoff and infiltration) with human impacts on local water availability.

Learning Objectives

• Explain energy transformations by tracing how energy changes form within a system.
• Identify examples of potential, kinetic, electrical, mechanical, and thermal energy in real-world situations.
• Describe how energy is conserved as it moves even when motion changes.

Learning Objectives

• Explain how scientific inquiry uses observations and questions to build evidence-based explanations
• Identify appropriate methods for investigating a question and describe how to record results carefully
• Use evidence to decide whether a new explanation fits existing knowledge or needs revision

Learning Objectives

• Explain how limiting factors like food, predation, disease, and weather affect population size over time
• Describe carrying capacity and how it helps explain why populations do not grow indefinitely
• Analyze how changes in conditions can cause populations to grow, stabilize, or decrease

Learning Objectives

• Explain how mutations in DNA can change proteins and affect traits.
• Identify different sources of mutations and describe how they impact populations over generations.
• Distinguish between harmful, neutral, and sometimes beneficial mutation effects under environmental conditions.

Learning Objectives

• Explain how climate variation and change can alter temperature, precipitation, and extreme-event frequency.
• Describe how these changes can shift species ranges and phenology (timing of life-cycle events).
• Analyze how climate-driven mismatches can disrupt ecological interactions and reduce reproductive success.

Learning Objectives

• Explain how genetic diversity within and among populations supports adaptation to changing conditions.
• Describe how mutation, gene flow, population size, genetic drift, and natural selection shape genetic variation.
• Predict how low genetic diversity can increase disease vulnerability, inbreeding depression, and extinction risk.+ Show more

Learning Objectives

• Explain how habitat fragmentation and edge effects can change conditions for native species
• Analyze how land use (agriculture, urban development, infrastructure) alters hydrology, soil properties, and connectivity
• Use cause-and-effect reasoning to predict how fragmentation may isolate populations and reduce gene flow+ Show more

Learning Objectives

• Describe biodiversity at genetic, species, and ecosystem levels
• Explain how species richness, evenness, and diversity indices are used to measure biodiversity
• Evaluate how sampling methods and environmental variation can change biodiversity estimates+ Show more

Learning Objectives

• Distinguish primary succession from secondary succession and give an example of each
• Explain how species traits and dispersal ability influence which organisms appear first during succession
• Describe how disturbances affect the timing and pathways of ecological succession+ Show more

Learning Objectives

• Explain the difference between atoms and molecules and how molecules form from atoms.
• Describe how chemical bonds change during reactions while individual atoms are conserved.
• Interpret simple chemical diagrams and formulas for reactants and products.

Learning Objectives

• Explain how coefficients in a chemical equation preserve conservation of atoms and conservation of mass
• Identify the difference between changing coefficients and changing subscripts in formulas
• Balance simple equations by adjusting coefficients and checking atom counts+ Show more

Learning Objectives

• Explain how mechanical and chemical digestion work together to break food into absorbable molecules
• Describe how tissue specialization (microvilli and enzyme-secreting cells) improves digestion and absorption
• Connect digestive processes to circulatory transport of nutrients for cellular energy, growth, and repair

Learning Objectives

• Explain how neurons convert stimuli into electrical signals and transmit them through axons and synapses
• Describe how myelination and synaptic vesicle release increase the speed and reliability of nervous signaling
• Connect cellular-level processes to organism-level responses such as reflexes, voluntary movement, and gland secretion

Learning Objectives

• Differentiate mixtures and compounds using the ideas of physical combination versus chemical bonding.
• Explain how properties of components in mixtures compare to properties of compounds.
• Use evidence from separation methods (physical vs chemical) to classify an unknown sample.

Learning Objectives

• Explain how simple machines redirect forces and change input/output force and distance
• Relate mechanical advantage and efficiency to conservation of work in ideal conditions and losses in real systems
• Compare levers, pulleys, and gears in terms of force direction and motion changes

Learning Objectives

• Explain speed as distance divided by time and identify appropriate units
• Distinguish constant speed from average speed using distance-time reasoning
• Use proportional reasoning to predict how changes in distance, speed, or time affect the others+ Show more