Grade 8 Science Worksheets

Learning Objectives

• Explain how genes and alleles help determine inherited traits.
• Describe how alleles from parents are combined during reproduction to create a child’s genotype.
• Distinguish genotype from phenotype and predict how traits can show patterns of inheritance.+ Show more

Learning Objectives

• Explain how limiting factors like food, predation, disease, and weather affect population size over time
• Describe carrying capacity and how it relates to why populations do not grow indefinitely
• Use cause-and-effect reasoning to predict how changes in conditions can change population growth patterns

Learning Objectives

• Explain how mutations in DNA can change alleles and affect protein structure or function.
• Distinguish between harmful, neutral, and beneficial mutation effects in different environments.
• Describe how low mutation rates can still increase genetic diversity over many generations.

Learning Objectives

• Explain how natural selection requires variation and depends on environmental conditions
• Describe how advantageous traits become more common over successive generations
• Use examples (such as antibiotic resistance) to illustrate changes in trait frequencies

Learning Objectives

• Explain how reproductive isolation can lead to speciation
• Describe how genetic variation and natural selection contribute to divergence
• Identify examples of barriers or behavioral changes that reduce interbreeding

Learning Objectives

• Explain how competition, predation, mutualism, commensalism, and parasitism affect survival and reproduction
• Describe how symbiotic relationships can change growth and population sizes in ecosystems
• Connect species interactions to ecosystem stability and biodiversity

Learning Objectives

• Explain how chromosome separation and recombination during meiosis create genetic variation in offspring.
• Describe how random assortment increases the number of possible allele combinations in gametes.
• Connect genetic variation to the raw material needed for evolution over time.

Learning Objectives

• Explain Newton’s third law using the idea of paired action–reaction forces on two interacting objects
• Identify action–reaction force pairs in real-world scenarios and describe their directions and timing
• Connect an object’s motion response to differences in mass and motion state during an interaction

Learning Objectives

• Explain how atomic composition and particle arrangement relate to observable macroscopic properties of matter
• Use models to describe how different structures made from the same element can show different behaviors
• Connect conductivity, brittleness, and melting point to bonding and atomic-level organization

Learning Objectives

• Compare physical and chemical changes using particle-level reasoning.
• Use observable evidence (gas, color change, precipitate) to identify signs of chemical change.
• Distinguish “new substance formed” evidence from changes in state or shape.

Learning Objectives

• Explain how kinetic energy depends on mass and speed, and how gravitational potential energy depends on height.
• Use graphs and data relationships to describe how changes in speed or elevation affect stored energy.
• Connect energy forms to observable motion using examples such as roller coaster crests and dips.

Learning Objectives

• Explain how gravitational potential energy and kinetic energy change as an object moves up or down.
• Use conservation reasoning to predict how an object's speed changes during vertical motion in a system.
• Interpret energy transfer on a roller coaster model to describe speed and height at key points.

Learning Objectives

• Explain how energy transfer causes changes in temperature of a material.
• Describe how thermal equilibrium is reached in interacting systems.
• Use energy conservation ideas to predict warming and cooling amounts.

Learning Objectives

• Explain how gravitational attraction depends on mass and distance.
• Predict how changing mass or distance affects the strength of gravity.
• Use the idea of gravity as a force of interaction that acts at a distance to describe motion.

Learning Objectives

• Explain how particle models connect molecular structure to observable properties like states of matter and solubility.
• Compare polar and nonpolar molecules and predict how each interacts with water.
• Describe how extended structures (polymers and crystalline solids) lead to different properties based on particle arrangement.

Learning Objectives

• Explain how net force determines whether an object speeds up, slows down, changes direction, or stays at constant velocity
• Use force magnitude and direction to predict the effect of multiple forces on an object
• Describe what happens when forces cancel and the net force is zero

Learning Objectives

• Distinguish physical (often reversible) changes from chemical (usually not easily reversible) changes by observing evidence.
• Explain how state changes like melting, freezing, boiling, and condensation can be reversed under different conditions.
• Use particle and substance ideas (atoms rearrange vs. form/state changes) to justify whether a change is reversible.

Learning Objectives

• Explain how thermal energy transfers through conduction, convection, and radiation
• Use everyday examples to connect heat movement to temperature changes
• Identify which thermal transfer mode best fits a described situation

Learning Objectives

• Explain conservation of energy in a system using energy transfers and conversions.
• Track how kinetic and potential energy change during motion (including gravity).
• Determine how an energy leaving a system affects energy accounting.

Learning Objectives

• Explain how natural selection can change a population’s trait distribution across generations.
• Describe the role of variation, heritability, and environmental pressures in adaptation.
• Use evidence-based reasoning to predict how selection pressures can shift over time.

Learning Objectives

• Explain how matter (water, carbon, and nitrogen) moves through living and nonliving parts of ecosystems
• Describe the role of decomposition in returning nutrients to soil and water
• Model how cycles keep ecosystems functioning over time

Learning Objectives

• Explain how decomposers break down dead matter and waste to return nutrients to ecosystems.
• Describe how decomposition supports biogeochemical cycling and sustained productivity.
• Use scientific vocabulary (decomposer, nutrients, organic matter, recycling) to explain energy and nutrient pathways.

Learning Objectives

• Explain how energy can move through a food web using multiple interconnected feeding relationships.
• Describe indirect effects in ecosystems when one population changes.
• Use food web pathway ideas to predict how changes can influence organisms at different trophic levels.

Learning Objectives

• Explain how negative feedback helps maintain stable internal conditions in homeostasis.
• Identify key parts of a negative feedback system (sensors, control center, and effectors).
• Describe how homeostatic control supports blood chemistry, water balance, and oxygen levels.

Learning Objectives

• Explain how genes and alleles influence inherited traits in offspring.
• Describe dominant and recessive allele patterns using examples.
• Use observations from a population to support the role of inherited variation in survival.

Learning Objectives

• Explain how internal body structures help organisms survive, grow, and reproduce.
• Describe how structure and function are connected in circulatory, digestive, and respiratory systems.
• Compare external features with internal needs related to feeding and protection.

Learning Objectives

• Explain how invasive species can disrupt an ecosystem by outcompeting native species, changing food webs, or spreading disease.
• Describe how shifts in community composition can alter energy transfer and nutrient use in ecosystems over time.

Learning Objectives

• Explain how membrane structure helps control the movement of substances into and out of cells.
• Describe diffusion, osmosis, and facilitated transport using concentration differences and transport proteins.
• Compare active transport and bulk transport in terms of energy use and direction control.

Learning Objectives

• Explain how patterns in the fossil record can support natural selection over time.
• Describe how similarities in structures among related organisms provide evidence for common ancestry and evolution.
• Connect genetic differences to functional traits and survival/reproduction in a changing environment.+ Show more

Learning Objectives

• Explain how multiple organ systems work together to maintain conditions cells need to function.
• Describe how nervous and endocrine signaling coordinate body responses.
• Use examples to connect circulatory, respiratory, and digestive systems to transport and processing of materials.

Learning Objectives

• Explain how interactions among organisms affect population sizes in an ecosystem.
• Describe how predation, competition, disease, and mutualism can change ecosystem stability over time.
• Connect population changes to changes in energy flow and matter cycling.

Learning Objectives

• Explain how ecosystems respond to disturbances and why some communities return to functional conditions.
• Describe how changes in population size can affect resource availability and later ecosystem development.
• Use evidence-based reasoning to distinguish stability from the idea that nothing changes.

Learning Objectives

• Explain how intermolecular forces affect melting and boiling points.
• Describe the regional effects of molecular interactions, like freeze–thaw cycles and vapor pressures in Alberta.
• Relate intermolecular forces to regional phenomena such as humidity influence on evaporation rates.

Learning Objectives

• Describe the basic principles of the particle theory of matter.
• Explain how particle motion and arrangement influence the properties of solids, liquids, and gases.
• Connect microscopic particle behavior with observable macroscopic traits such as rigidity, flow, and compressibility.+ Show more

Learning Objectives

• Explain how DNA mutations can change alleles and influence protein structure or function
• Distinguish between harmful, neutral, and beneficial mutation effects in different environments
• Describe how mutation rates and natural selection can increase trait diversity over generations

Learning Objectives

• Identify observable signatures of chemical change such as temperature change, precipitate formation, color change, and gas release.
• Explain the significance of reaction signatures in environmental and industrial contexts.
• Analyze examples involving corrosion, effervescence, and combustion residues to understand chemical transformations.

Learning Objectives

• Understand the different types of phase transitions and the energy changes involved.
• Describe how pressure and temperature influence phase changes such as melting, freezing, vaporization, and condensation.
• Identify real-world examples of phase transitions in Alberta phenomena affecting hydrology and infrastructure.+ Show more

Learning Objectives

• Understand the chemical and environmental factors contributing to material corrosion.
• Identify evidence of corrosion and how environmental conditions influence degradation.
• Explore protective measures and materials science approaches to prevent corrosion.+ Show more

Learning Objectives

• Understand how to connect measurable masses of reactants and products using proportional reasoning.
• Apply mass conservation principles to interpret chemical reactions in real-world systems.
• Use stoichiometric thinking to estimate material balances and assess reaction outcomes.+ Show more

Learning Objectives

• Understand the various separation techniques based on physical property differences.
• Identify the applications of filtration, evaporation, distillation, and magnetism in real-world scenarios.
• Describe the purpose of each separation method and how they are used in industry and environmental management.+ Show more

Learning Objectives

• Understand the classification of substances as pure elements, compounds, or mixtures.
• Identify different types of mixtures and their characteristics.
• Apply classification criteria to interpret material behavior in environmental and industrial contexts.+ Show more

Learning Objectives

• Describe the particle arrangement and energy differences in solids, liquids, and gases.
• Explain how particle bonding strength affects the state of matter.
• Identify examples of each state of matter in Alberta and regional contexts.+ Show more

Learning Objectives

• Understand the components and functions of electric power grids.
• Identify regional characteristics influencing energy generation.
• Explain grid operations including conversion and voltage management.+ Show more

Learning Objectives

• Understand the principles of circuit analysis and conservation laws.
• Apply systematic methods to determine voltages, currents, and power in electrical networks.
• Use schematic diagrams and equivalent resistance reduction to simplify complex circuits.+ Show more

Learning Objectives

• Explain how variation, inheritance, and environmental pressures affect survival and reproduction
• Describe how trait frequencies change over successive generations through natural selection
• Use an example (such as antibiotic resistance) to support claims about adaptation

Learning Objectives

• Identify the main components of a simple electric circuit.
• Explain the functions of sources, conductors, loads, and control elements.
• Recognize schematic symbols for common circuit components.+ Show more

Learning Objectives

• Describe the concept of electric charge and its intrinsic properties.
• Explain the differences between static electricity and current electricity.
• Identify real-world phenomena related to electrostatic effects and electric currents.+ Show more

Learning Objectives

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