Grade 8 Worksheets

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

• Distinguish density-dependent factors from density-independent factors using evidence from a text
• Explain how density-dependent factors can change birth rates, death rates, or survival over generations
• Describe how human-made barriers can alter how populations experience density effects

Learning Objectives

• Identify the perpendicular and parallel components of gravity relative to a slope
• Explain how the parallel component relates to motion down the incline
• Describe how friction and gravity components affect whether an object tends to move

Learning Objectives

• Explain what calibration is and how it improves measurement accuracy.
• Identify sources of uncertainty in measurements using instruments.
• Use appropriate units and reasonable significant figures when interpreting data.

Learning Objectives

• Explain how a spring’s restoring force changes when it is stretched or compressed
• Identify the direction of the restorative force in relation to the spring’s deformation
• Describe the proportional (linear) relationship between force and displacement within the elastic limit+ Show more

Learning Objectives

• Describe what makes a homogeneous mixture uniform at the macroscopic scale
• Distinguish homogeneous mixtures from heterogeneous mixtures using observable evidence
• Explain how concentration and solubility relate to forming and measuring solutions

Learning Objectives

• Identify mole ratios from coefficients in a balanced chemical equation
• Use mole ratios to predict relative mass amounts of reactants and products
• Explain how mass conservation helps interpret changes in a closed system

Learning Objectives

• Explain how intermolecular attractions affect melting point, boiling point, and solubility
• Use the ideas of stronger versus weaker intermolecular forces to predict changes in physical properties
• Connect molecular interactions to real Alberta examples such as freeze–thaw cycles and evaporation

Learning Objectives

• Identify how grounding and insulation reduce shock risk in electrical systems
• Explain how protective design and proper material choice lower fire and equipment damage hazards
• Apply safety concepts to everyday scenarios involving electrical devices

Learning Objectives

• Identify the main idea of how circular motion changes direction
• Explain how centripetal force, radius, and mass relate to the needed inward force
• Describe what happens when inward force is not sufficient for a curve

Learning Objectives

• Define speed as the scalar magnitude of motion
• Distinguish speed from velocity and acceleration using a scenario
• Use distance and time to calculate and interpret speed

Learning Objectives

• Define current, voltage, and power in electrical circuits
• Use Ohm’s law and the power equations to relate voltage, current, and resistance
• Identify how series and parallel connections affect equivalent resistance+ Show more

Learning Objectives

• Explain the difference between reaction time and braking time.
• Describe how forces that oppose motion slow a vehicle down.
• Use key details from a text to answer questions about stopping distance.

Learning Objectives

• Explain the relationship between voltage and electric current
• Define current, resistance, and the role of electric potential
• Use key vocabulary from a science passage to answer questions

Learning Objectives

• Identify key cause-and-effect details about collision forces from a science text.
• Explain how contact time and peak force can affect changes in motion.
• Describe how deformation can help absorb collision energy.

Learning Objectives

• Explain the main components of an electric power grid and how electricity moves from generators to homes.
• Identify how supply and demand are balanced in real time.
• Describe how regional resources affect the generation mix in a grid.+ Show more

Learning Objectives

• Identify inertia as an object’s tendency to keep its motion or rest unless a net force acts.
• Explain how net force relates to acceleration in terms of direction and magnitude.
• Use Newton’s laws to predict how motion changes when forces change.

Learning Objectives

• Identify the main idea and key details about predator–prey balance
• Explain how predation affects prey populations and predator populations
• Describe how refuges and compensatory mechanisms influence population outcomes

Learning Objectives

• Define net force as the overall push or pull on an object.
• Explain how net force relates to whether an object speeds up, slows down, changes direction, or stays at rest.
• Distinguish balanced forces from unbalanced forces using net force.

Learning Objectives

• Describe how invasive species spread to new habitats and why they can become established.
• Explain how invasive species compete for resources and affect native species over time.
• Use key vocabulary (non-native, competition, resources, biodiversity, food web) in context.

Learning Objectives

• Define a closed system in terms of matter exchange
• Identify examples of what can change and what stays the same in a closed system
• Use mass conservation ideas to interpret reactants and products in a contained process

Learning Objectives

• Use particle theory to explain how substances can mix and move in environmental systems.
• Interpret chemical signatures (patterns of ions or elements) as evidence for sources and sinks.
• Connect mass conservation ideas to how a closed or semi-closed system can store and transfer matter.

Learning Objectives

• Identify the main idea and key details about how energy enters ecosystems.
• Explain how energy moves from producers to consumers and how some energy is lost at each step.
• Describe the role of decomposers/detritivores in returning matter and supporting energy flow.

Learning Objectives

• Describe particle theory: matter is made of tiny particles.
• Explain how particle motion and spacing relate to the properties of solids, liquids, and gases.
• Use Alberta examples to connect temperature to particle motion and state changes.

Learning Objectives

• Explain how filtration separates mixtures using particle size.
• Describe clarification as a cause-and-effect process that reduces suspended solids in water.
• Use evidence from a passage to support claims about separation methods.

Learning Objectives

• Identify evidence in a text that describes a solid’s property
• Explain how particle spacing and packing help solids keep a fixed shape
• Use particle models to distinguish solids from other states of matter

Learning Objectives

• Identify how electrical energy transforms into thermal energy in resistive devices.
• Use efficiency and power ideas to describe energy losses as heat.
• Find key details in an informational passage and summarize the main idea.

Learning Objectives

• Define electric charge and describe how it relates to electrostatic effects and electric current.
• Distinguish static electricity from current electricity by origin, mobility, and typical effects.
• Identify key safety and everyday examples of electric charge.

Learning Objectives

• Identify evidence of chemical change in a text about corrosion
• Explain how moisture and salinity can affect the rate and products of corrosion
• Connect protective measures to the chemical reactions involved in corrosion

Learning Objectives

• Explain the purpose of magnetic fields
• Describe how north and south poles interact
• Use field-line ideas to interpret magnetic field strength+ Show more

Learning Objectives

• Define voltage as electric potential difference and relate it to energy per unit charge.
• Explain how voltage influences electric current using the ideas of energy, charge, and resistance.
• Identify common voltage sources and understand the role of reference points in circuit analysis.

Learning Objectives

• Describe how energy is transferred between trophic levels in a food chain
• Use typical efficiency ranges to explain why less energy reaches higher trophic levels
• Connect energy availability to population size and ecosystem biomass patterns

Learning Objectives

• Identify herbivores, omnivores, and carnivores and their trophic positions
• Explain how feeding relationships form food chains and energy transfer patterns
• Describe how omnivory can blur discrete trophic levels+ Show more

Learning Objectives

• Explain inertia using Newton’s First Law
• Identify evidence of inertia in everyday situations
• Describe how forces change motion in terms of net force and acceleration

Learning Objectives

• Define power, energy, and time and identify the main idea of a scientific text.
• Explain how efficiency compares useful output to input using device examples.
• Describe how common loss mechanisms reduce delivered energy in electrical systems.

Learning Objectives

• Identify clues that show whether a change is physical or chemical.
• Classify described evidence from a text using the properties of matter.
• Explain how physical and chemical changes differ using evidence such as state, new substances, and observable energy or gas effects.

Learning Objectives

• Explain how population growth depends on birth rates and death rates
• Identify cause-and-effect in descriptions of population change
• Describe why exponential growth cannot continue forever

Learning Objectives

• Identify the main idea of an informational text about human effects on ecosystems.
• Describe supporting details about how land use changes habitats, nutrients, and species interactions.
• Explain one ecosystem mitigation approach used to reduce harm.

Learning Objectives

• Explain how nutrients move between biotic and abiotic pools in an ecosystem
• Describe roles of decomposers and processes such as mineralization, nitrogen fixation, and sedimentation
• Connect cycling rates to temperature and moisture+ Show more

Learning Objectives

• Identify the main claim and supporting details in a circuit description.
• Explain how series circuits affect current, resistance, and voltage across components.
• Use key comparisons to predict how brightness and redundancy change in real circuits.

Learning Objectives

• Explain how food webs combine many feeding relationships into a connected system.
• Describe how indirect interactions and redundancy can affect community stability.
• Use the ideas of energy pathways and link strength to predict effects of species loss.

Learning Objectives

• Explain how abiotic factors and biotic factors affect population growth
• Describe carrying capacity and density-dependent limits
• Use cause-and-effect language to interpret population changes

Learning Objectives

• Describe a free-body diagram as a set of forces acting on one object
• Identify common forces (gravity, normal, friction, and applied force) and the direction of each arrow
• Use the idea of net force to reason about likely motion without heavy computation

Learning Objectives

• Identify how ecosystem diagrams represent biomass stocks and energy or nutrient flows.
• Distinguish between assumptions in a model and real observations in an ecosystem.
• Explain, using simple language, how conservation ideas guide ecosystem model structure.

Learning Objectives

• Distinguish between static and kinetic friction
• Explain how surface texture, normal force, and material pairing affect friction
• Describe how friction opposes relative motion and leads to heat and wear

Learning Objectives

• Identify system components in a force problem
• Distinguish internal forces from external forces
• Use force accounting to predict whether a system is in equilibrium or accelerating

Learning Objectives

• Explain how particle motion relates to gas pressure and temperature.
• Describe how gases expand or compress in response to temperature changes.
• Use diffusion to predict how gases spread through air over time.

Learning Objectives

• Explain how producers capture energy to make organic matter
• Describe factors that affect primary productivity
• Compare how different plant types and environments influence energy flow+ Show more