Grade 8 Science Worksheets

Learning Objectives

• Understand the process of ecological succession and its stages.
• Identify differences between primary and secondary succession.
• Analyze factors that influence successional pathways and ecological stability.+ Show more

Learning Objectives

• Explain how the relative positions and motions of the Earth, Moon, and Sun produce lunar phases, eclipses, and seasonal changes.
• Describe the key cycles such as the lunar synodic month and seasonal progression and how they relate to observable sky patterns.
• Identify how orbital geometry and axial tilt influence phenomena like moon phases, eclipses, and insolation differences.

Learning Objectives

• Understand how gravity governs the motions of celestial bodies within the solar system and galaxies.
• Explain the concepts of orbital trajectories, mutual gravitational attraction, and centripetal acceleration.
• Analyze how the balance between inertia and gravity results in elliptical orbits and determine orbital periods.+ Show more

Learning Objectives

• Understand the scale relationships among solar system objects using diameters, distances, and orbital periods.
• Interpret quantitative data to recognize patterns and relationships in the solar system's structure.
• Compare planetary sizes and distances using astronomical units and relative scaling methods.+ Show more

Learning Objectives

• Identify observable indicators of chemical reactions such as color change, gas evolution, precipitate formation, temperature change, and irreversible transformation.
• Understand how these indicators help distinguish chemical changes from physical changes.
• Recognize examples like rusting, combustion, and effervescence as evidence of chemical reactions.+ Show more

Learning Objectives

• Explain how allele combinations produce observable trait patterns through Mendelian inheritance.
• Describe dominant and recessive allele interactions and predict phenotypic ratios using Punnett squares.
• Interpret segregation of alleles, simple probability outcomes, and basic pedigree diagrams.+ Show more

Learning Objectives

• Understand how ballast systems control buoyancy and depth in submarines.
• Explain how water intake and ejection alter a submarine's density and buoyant force.
• Describe the concept of neutral buoyancy and stability during trim adjustments.+ Show more

Learning Objectives

• Explain how ballast tanks control buoyancy by changing displaced volume and overall density
• Describe neutral buoyancy and how submarines maintain stable submerged navigation
• Analyze how pressure and stability concerns affect depth control and hull integrity

Learning Objectives

• Understand how particle-level diagrams illustrate atoms and molecules during reactions.
• Interpret particle diagrams to analyze how atoms are rearranged without changing their identity or count.
• Translate macroscopic observations into atomic explanations using particle models.+ Show more

Learning Objectives

• Explain the principles of conduction, convection, and radiation in heat transfer.
• Identify and describe materials and strategies used to control thermal energy flow.
• Apply concepts of thermal resistance and material properties to real-world systems.+ Show more

Learning Objectives

• Define what genes are and their role in inherited traits.
• Differentiate between dominant and recessive alleles.
• Identify examples of inherited traits in humans and other organisms.+ Show more

Learning Objectives

• Understand the different types of friction and their roles in mechanical systems.
• Analyze how surface texture, normal force, and material selection affect frictional forces.
• Evaluate methods for estimating friction in simple apparatus and their implications for engineering design.+ Show more

Learning Objectives

• Identify different types of slopes on distance-time graphs
• Interpret what flat and steep segments indicate about motion
• Analyze curves to understand changing speed and acceleration+ Show more

Learning Objectives

• Understand the concept of density as mass per unit volume.
• Identify real-world examples of density differences, such as floating objects.
• Apply simple calculations to determine the density of objects using mass and volume.+ Show more

Learning Objectives

• Understand the basic parts of an atom, including protons, neutrons, and electrons.
• Differentiate between elements and compounds based on atomic composition.
• Learn about the organization of the periodic table and how it relates to atomic structure.+ Show more

Learning Objectives

• Understand the process of ecological succession and its stages.
• Differentiate between primary and secondary succession.
• Identify species traits that influence successional pathways.+ Show more

Learning Objectives

• Understand the role of primary producers in ecological energy flow.
• Explain photosynthetic efficiency and factors affecting primary productivity.
• Differentiate between types of vegetation and their productivity in Alberta.+ Show more

Learning Objectives

• Understand key concepts related to Science
• Apply knowledge through practice questions
• Demonstrate comprehension of the material

Learning Objectives

• Understand how to interpret slopes and areas in distance–time and velocity–time graphs.
• Apply graphical analysis to determine speed and acceleration in uniform and accelerated motion.
• Calculate displacement from area under velocity–time graphs.+ Show more

Learning Objectives

• Describe the phases of the Moon and how their positions relate to lunar illumination.
• Explain the causes and conditions of solar and lunar eclipses based on orbital alignments.
• Understand tidal forces, including spring and neap tides, and how gravitational pull affects Earth's oceans.+ Show more

Learning Objectives

• Explain how gear ratios affect torque and angular velocity in simple and compound gear trains.
• Determine direction changes and overall gear ratio in gear trains that use spur gears and idler gears.
• Use tooth counts to predict mechanical advantage and describe speed–torque trade-offs.

Learning Objectives

• Identify different types of magnetic materials and their properties
• Understand the interaction of materials with magnetic fields
• Explain the concepts of coercivity and remanence in magnetic domains+ Show more

Learning Objectives

• Identify different trophic levels in a food chain.
• Explain how energy flows from producers to consumers.
• Describe the concept of energy transfer efficiency between trophic levels.+ Show more

Learning Objectives

• Explain energy conservation in closed systems by tracking kinetic energy changes and energy transfers.
• Distinguish elastic vs. inelastic collisions using energy accounting.
• Describe how friction and work/heat move energy between objects and surroundings.

Learning Objectives

• Explain the principle of mass conservation in chemical reactions with microscopic and macroscopic perspectives.
• Understand how atoms are conserved at the particulate level during chemical changes.
• Relate symbolic equations to the conservation of mass in closed systems.+ Show more

Learning Objectives

• Analyze and interpret data related to natural hazards such as earthquakes, volcanoes, and tsunamis.
• Understand the techniques used to assess hazard recurrence intervals and spatial distribution.
• Evaluate the impacts of natural hazards and the importance of monitoring, modeling, and forecasting.+ Show more

Learning Objectives

• Explain how net force is determined when forces act in opposite directions
• Describe how nonzero net force causes a change in velocity (speed and/or direction)
• Relate the direction of acceleration to the direction of the larger (net) force

Learning Objectives

• Explain how fixed, movable, and compound pulley systems affect force and motion
• Calculate ideal mechanical advantage using the number of rope segments supporting a moving pulley block
• Describe how friction and rope stretch reduce mechanical advantage compared to ideal systems+ Show more

Learning Objectives

• Understand how multiple organ systems work together to maintain homeostasis.
• Identify key functions of respiratory, circulatory, excretory, and endocrine systems.
• Explain how cellular structures support systemic functions.+ Show more

Learning Objectives

• Identify and describe different types of energy including kinetic, potential, elastic, thermal, chemical, and electrical.
• Understand how energy transforms from one form to another in everyday systems.
• Apply basic equations to compare kinetic and potential energy quantitatively.+ Show more

Learning Objectives

• Explain how an inclined plane changes the direction of an applied force and relates it to the components of gravitational force.
• Calculate ideal mechanical advantage for ramps using the ratio of slope length to height.
• Describe how friction and surface finish affect the input force needed on real inclined planes and wedges.+ Show more

Learning Objectives

• Explain how hydrostatic pressure changes with depth using p = ρgh
• Compare pressure at different depths in liquids of different densities
• Interpret how communicating vessels relate to equal pressure at the same level+ Show more

Learning Objectives

• Explain how demand management, source protection, riparian buffers, agricultural best management measures, and wetland preservation protect freshwater resources.
• Analyze trade-offs between water supply, ecological integrity, and economic uses at the catchment (watershed) scale.
• Describe how community-scale and household actions influence flow regimes, pollutant loads, and long-term sustainability of freshwater services.

Learning Objectives

• Explain how green infrastructure manages stormwater using nature-based and engineered features.
• Identify key functions of green infrastructure, including infiltration, runoff slowing, and pollutant capture.
• Describe design parameters (soil media, slope, vegetation, storage volume) that influence effectiveness.+ Show more

Learning Objectives

• Describe the major freshwater and saline water reservoirs on Earth and compare their relative proportions.
• Explain how climate, topography, and geology influence where freshwater is stored and where it can be extracted.
• Analyze why access to potable water is uneven across regions and connect this to water security and transboundary concerns.

Learning Objectives

• Trace an energy pathway through coupled mechanical subsystems and identify where energy conversions occur.
• Quantify useful output energy and explain how losses at interfaces reduce net energy transfer.
• Use energy-pathway reasoning to evaluate design implications for reliability and performance.

Learning Objectives

• Explain linear momentum and conservation of momentum for closed systems
• Describe impulse and connect impulse to change in momentum using force–time ideas
• Distinguish elastic vs. inelastic collisions and predict post-interaction velocities at classroom scales

Learning Objectives

• Explain how watershed boundaries determine where water flows and how drainage basins are organized.
• Describe how land cover, slope, and soil type affect infiltration and overland runoff.
• Identify how storage elements (lakes, wetlands, floodplains) modulate streamflow over time.+ Show more

Learning Objectives

• Explain torque using lever arm and moment of force, and interpret how direction is set by the turning effect.
• Use conditions for rotational equilibrium to determine when the net torque on an object is zero.
• Connect net torque to angular acceleration and apply simple calculations involving rotational inertia and applied torque.+ Show more

Learning Objectives

• Explain how hydrostatic pressure increases with depth and how that creates forces on submerged surfaces.
• Determine the net hydrostatic force and its line of action (centre of pressure) for simple depth-pressure relationships.
• Use hydrostatic force concepts to predict effects on dam faces and bulkheads and suggest anchoring/material strategies.

Learning Objectives

• Define power as the rate of doing work and the rate of energy transfer
• Use SI units of watts (W) and connect power to mechanical performance
• Explain how motor torque and rotational speed relate to output power+ Show more

Learning Objectives

• Explain the three core ideas of cell theory and how they describe both unicellular and multicellular organisms
• Describe how historical scientists and modern microscopy/imaging supported the development of cell theory
• Use evidence from cell structure and cell reproduction to make claims about how cells function and arise

Learning Objectives

• Explain how gear ratios determine angular velocity and direction in simple and compound gear trains
• Calculate overall gear ratio for spur gear interactions and predict speed and torque trade-offs
• Describe how idler gears change direction without changing overall gear ratio+ Show more

Learning Objectives

• Classify levers as first-, second-, or third-class based on the positions of fulcrum, input force, and output force.
• Calculate mechanical advantage (MA) of a lever using distances from the fulcrum to the forces.
• Explain how force amplification involves trade-offs in range of motion and practical limitations like friction and deformation.

Learning Objectives

• Explain how surface water and groundwater interact, including gaining and losing reaches and baseflow.
• Describe how permeability, hydraulic gradients, and recharge zones influence exchange rates.
• Connect river stage and seasonal variability to changes in spring discharge, hyporheic flow, and water chemistry.+ Show more

Learning Objectives

• Explain how solar energy and gravity drive the hydrologic cycle processes.
• Describe evaporation, condensation, precipitation, infiltration, runoff, and groundwater movement.
• Compare the role of major water reservoirs (oceans, glaciers/ice, aquifers) using mass balance ideas and residence time.

Learning Objectives

• Explain how advection, dispersion, and diffusion move contaminants through surface and subsurface water.
• Describe how sorption and biodegradation/redox reactions can reduce contaminant concentrations over time.
• Predict how contaminant plumes form and migrate using ideas about preferential flow and aquifer transport.+ Show more

Learning Objectives

• Understand the concept of inertia and its importance in physics.
• Identify real-world examples demonstrating Newton's first law.
• Explain how forces affect motion and predict outcomes in different scenarios.