Grade 8 Science Worksheets

Learning Objectives

• Understand how matter cycles through ecosystems involving living and nonliving components.
• Identify processes such as decomposition, gas exchange, and nutrient transformation that return elements to the environment.
• Explain how producers and consumers transfer matter within ecosystems.+ Show more

Learning Objectives

• Understand how matter moves through ecosystems
• Identify processes such as decomposition, gas exchange, and nutrient transformation
• Explain how atoms cycle through different organisms and environmental components+ Show more

Learning Objectives

• Analyze interactions among organisms, abiotic factors, and human activities in ecosystems.
• Evaluate how environmental changes affect keystone species and food webs.
• Understand the concept of ecosystem resilience and the trade-offs in conservation decisions.

Learning Objectives

• Identify the main components of a simple electric circuit and their functions.
• Understand the schematic symbols used for circuit components.
• Explain the difference between series and parallel circuits.+ Show more

Learning Objectives

• Understand the differences between elastic and inelastic collisions and their energy transfer mechanisms.
• Analyze how momentum and energy conservation influence collision outcomes.
• Describe energy transformations during different types of collisions between objects like balls, cars, or pucks.

Learning Objectives

• Differentiate speed, velocity, and acceleration using precise scientific definitions.
• Interpret motion using direction and rates of change from distance and time information.
• Use kinematics concepts to explain changes in velocity magnitude and direction in everyday travel examples.

Learning Objectives

• Explain what power and efficiency mean in electrical and everyday systems
• Identify common energy loss mechanisms and how they affect delivered energy
• Use device specifications to compare efficiency and estimate impacts on cost and emissions

Learning Objectives

• Understand the structure and function of the respiratory system.
• Explain how the respiratory system facilitates gas exchange.
• Identify the key organs involved in breathing and gas exchange.+ Show more

Learning Objectives

• Explain how erosion, transport, and deposition shape Earth’s surface
• Describe how runoff and groundwater contribute to landforms such as valleys, deltas, and springs
• Connect tectonic uplift and drainage changes to where sediment accumulates+ Show more

Learning Objectives

• Understand how water movement shapes Earth's surface through erosion, transport, and deposition.
• Identify the roles of runoff, groundwater, and tectonic uplift in landscape evolution.
• Describe models that combine reservoir flow with surface pathways to explain water and landform interactions.+ Show more

Learning Objectives

• Explain how multiple organ systems work together to maintain homeostasis.
• Identify key functions of respiratory, circulatory, excretory, and endocrine systems.
• Describe how cellular specialization contributes to organ function.+ Show more

Learning Objectives

• Explain how particle motion and spacing relate to solids, liquids, and gases.
• Describe how temperature affects particle motion and how state changes occur.
• Use particle ideas to predict changes in shape and volume during heating and cooling.

Learning Objectives

• Explain how a force can change an object’s motion by changing its speed and/or direction.
• Describe how forces combine to form a net force and how net force affects motion changes.
• Use qualitative and proportional reasoning to compare how larger and smaller net forces can produce different motion changes.+ Show more

Learning Objectives

• Understand the difference between pure substances and mixtures
• Identify examples of pure substances and mixtures from everyday life
• Learn classification criteria for substances and mixtures

Learning Objectives

• Define electric charge and explain how it leads to electrostatic effects and electric current
• Compare static electricity and current electricity in terms of charge mobility and typical effects
• Predict what happens when charged objects interact using basic charge ideas+ Show more

Learning Objectives

• Explain how chemical reactions rearrange atoms to form new substances while conserving atoms.
• Use particle models to connect reactants and products to observable evidence (gas, color change, temperature change).
• Describe how energy models explain whether a reaction releases or absorbs thermal energy.

Learning Objectives

• Explain how energy transfer affects particle motion during melting
• Describe the difference between solid and liquid at the particle level
• Predict whether melting is occurring based on energy changes

Learning Objectives

• Explain why energy transfer between trophic levels is inefficient using ideas of heat loss and incomplete digestion.
• Use typical ecosystem energy-efficiency ranges to describe how biomass changes from producers to top predators.
• Apply energy-efficiency concepts to real Alberta examples and predict effects on population size and species richness.

Learning Objectives

• Explain how predator and prey populations affect one another through direct mortality and behavior changes.
• Describe how refuges and functional responses shape predator–prey interactions.
• Analyze cascading trophic effects when top predators are absent or return to an ecosystem.

Learning Objectives

• Identify clear scientific claims from opinions.
• Distinguish between evidence types used in scientific arguments.
• Understand how reasoning connects evidence to claims.+ Show more

Learning Objectives

• Describe the hierarchical levels of cell organization in multicellular organisms.
• Explain the roles of tissues, organs, and organ systems in maintaining organismal functions.
• Understand how similar cells join to form tissues and how tissues work together in organs.+ Show more

Learning Objectives

• Explain the principle of mass conservation in a closed system during physical or chemical changes
• Use evidence from mass measurements to determine whether matter is escaping a system
• Apply mass conservation to interpret reactants, products, and mass budgets in real contexts+ Show more

Learning Objectives

• Explain how engineering models link inputs to expected outputs.
• Describe how comparing prototype measurements with model predictions leads to model adjustment and design refinement.
• Use evidence from testing to improve explanations of system behavior.

Learning Objectives

• Understand the importance of electrical grounding for safety
• Identify safety features used in electrical system design
• Recognize environmental impacts associated with electrical generation and infrastructure

Learning Objectives

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

Learning Objectives

• Understand how engineering models predict system behavior and guide design refinement.
• Identify the process of adjusting models based on measurement discrepancies.
• Explain the role of testing evidence in refining engineering explanations.+ Show more

Learning Objectives

• Explain how particle motion relates to gas pressure and temperature in a confined system.
• Describe how changes in temperature can cause expansion, compression, and changes in pressure.
• Use the idea of diffusion to predict how gases mix over time under different conditions.+ Show more

Learning Objectives

• Identify the components of physical systems
• Understand how forces are decomposed in complex systems
• Distinguish between internal and external forces+ Show more

Learning Objectives

• Understand the concept of homeostasis and its importance.
• Identify key components involved in homeostatic mechanisms.
• Recognize how the body maintains stable internal conditions.

Learning Objectives

• Understand the concept of balanced and unbalanced forces
• Identify static equilibrium in real-world objects
• Analyze force vectors to determine net force+ Show more

Learning Objectives

• Explain how collisions transfer and transform energy between objects.
• Distinguish elastic collisions from inelastic collisions in terms of kinetic and mechanical energy.
• Use momentum and energy ideas to predict what happens during collisions.

Learning Objectives

• Understand how energy flows through ecosystems from the Sun to different trophic levels.
• Identify the concept of energy decrease at each trophic level in a food chain.
• Explain the difference between food chains and food webs.+ Show more

Learning Objectives

• Explain how simple machines redirect forces and trade force for distance to gain mechanical advantage.
• Identify and describe different types of simple machines such as levers, pulleys, and gears.
• Analyze energy transfer and conservation of work in ideal mechanical systems.+ Show more

Learning Objectives

• Construct a Claim–Evidence–Reasoning (CER) argument using measurements, trends, and comparisons as evidence.
• Explain how scientific principles connect evidence to a claim through clear reasoning.
• Evaluate CER arguments by checking whether evidence is sufficient, relevant, and consistent with the proposed mechanism.

Learning Objectives

• Identify the parts of a CER argument: claim, evidence, and reasoning.
• Use measurements, trends, and comparisons as evidence instead of opinions.
• Write scientific reasoning that explains how evidence supports a claim using scientific principles.+ Show more

Learning Objectives

• Explain how igneous, sedimentary, and metamorphic rocks form from changing Earth materials.
• Describe how minerals form and how their composition affects physical properties.
• Connect the rock cycle to long-term Earth changes driven by tectonic activity.

Learning Objectives

• Define and calculate speed as distance divided by time.
• Differentiate between constant speed and average speed.
• Apply proportional reasoning to relate speed, distance, and time.+ Show more

Learning Objectives

• Explain how matter cycles between living organisms and nonliving parts of an ecosystem.
• Describe how decomposition, gas exchange, and soil nutrient transformation return matter to the environment.
• Trace how producers and consumers transfer matter through feeding and growth over time.

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

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

Learning Objectives

• Explain observable reaction outcomes by combining particle (atom/arrangement) and energy (temperature) perspectives.
• Use particle models to describe how atoms rearrange to form new substances during chemical reactions.
• Interpret temperature changes as evidence of energy changes in a reacting system.+ Show more

Learning Objectives

• Describe how energy moves through trophic levels in an ecosystem.
• Explain why energy decreases as it transfers from producers to consumers.
• Use food web ideas to predict how changes in one species can affect other trophic levels.

Learning Objectives

• Explain the basic structure and components of electric power grids.
• Identify regional influences on power generation methods.
• Describe how power grids manage supply, demand, and losses.

Learning Objectives

• Understand the concept of power as energy transfer per unit time.
• Learn how efficiency measures the useful output versus input in electrical devices.
• Identify common causes of energy loss in electrical systems.+ Show more

Learning Objectives

• Understand the importance of proper instrument calibration.
• Learn how to estimate measurement uncertainty.
• Recognize the significance of significant figures and units in data accuracy.+ Show more

Learning Objectives

• Understand how to evaluate whether evidence supports a causal relationship or just correlation.
• Identify variables, alternative causes, and patterns across different conditions or trials.
• Analyze media claims to determine if they match the strength and limitations of available data.+ Show more

Learning Objectives

• Understand what makes a claim testable through observations and measurements.
• Identify variables and observations in scientific hypotheses.
• Differentiate between a hypothesis and an observation based on evidence.+ Show more

Learning Objectives

• Explain voltage (electric potential difference) as energy per unit charge available to move charges in a circuit
• Describe how voltage sources (cells, batteries, generators) relate to current and resistance in everyday circuits
• Use reference points to compare potential differences in multi-source circuit situations