Grade 7 Science Worksheets

Learning Objectives

• Explain how a keystone species can strongly affect ecosystem structure and biodiversity even when it is not the most abundant organism.
• Describe how removing a keystone species can cause trophic cascades and change energy flow through a food web.
• Use evidence from food webs to identify why keystone species are important for conservation planning.

Learning Objectives

• Use the relationship Q = mcΔT to estimate the thermal energy needed to change a substance’s temperature.
• Explain how specific heat capacity links material identity to temperature change for a given mass and added heat.
• Describe how heat-transfer rate depends on area, temperature gradient, and time.

Learning Objectives

• Explain how the particle model describes matter as atoms and molecules in constant motion.
• Describe how chemical changes involve breaking and forming bonds between particles.
• Use the particle model to justify why mass is conserved in a closed system.

Learning Objectives

• Explain how simple mechanisms transfer motion and force in engineered systems
• Describe how input energy produces output performance in a connected system
• Use examples of gears, pulleys, levers, and linkages to predict changes in speed and force

Learning Objectives

• Interpret symbolic chemical equations and explain what quantitative information they can (and cannot) provide about matter interactions.
• Read and compare graphs of mass or temperature versus time to determine trends such as reaction rate or energy change.
• Use tabulated experimental data and stoichiometric relationships to make quantitative comparisons.+ Show more

Learning Objectives

• Explain how chemical properties affect what happens during chemical changes
• Identify observable indicators (gas, colour change, precipitates) linked to chemical processes
• Compare stability of different materials using reactivity, oxidation, corrosion, and pH-related behaviour+ Show more

Learning Objectives

• Explain how food molecules are broken down and rearranged into molecules needed for growth and repair.
• Describe how chemical energy in food becomes usable energy for life processes.
• Use scientific vocabulary (molecules, energy, chemical energy, growth, repair) to answer questions about digestion and body changes over time.

Learning Objectives

• Explain how groundwater is stored and how it moves through aquifers.
• Describe how recharge and infiltration affect groundwater availability over time.
• Analyze how groundwater pumping can change surface water flow and water quality.

Learning Objectives

• Understand how adaptive traits become common in populations through natural selection.
• Identify factors such as variation, heritability, and environmental pressures that influence trait distribution.
• Apply examples like camouflage and pesticide resistance to illustrate the process of selection.+ Show more

Learning Objectives

• Understand how vibrating objects produce sound waves in a medium.
• Identify how frequency affects pitch and amplitude affects loudness.
• Explain the dependence of sound transmission on a medium like air.+ Show more

Learning Objectives

• Understand what habitat fragmentation is.
• Identify the effects of habitat fragmentation on ecosystems.
• Recognize ways to connect fragmented habitats.+ Show more

Learning Objectives

• Explain how producers, consumers, and decomposers transfer matter and energy in ecosystems
• Describe how energy flows through food chains and food webs and why energy decreases at higher trophic levels
• Use key vocabulary (producer, consumer, decomposer, trophic level, metabolism, heat) to support scientific explanations

Learning Objectives

• Interpret variability and assess the reliability of data sets using measures such as mean, median, and range.
• Analyze graphical representations like histograms and box plots to evaluate data spread and identify possible misconceptions.
• Compare data sets through replicated trials and proportional reasoning to determine consistency and significance of findings.+ Show more

Learning Objectives

• Understand the basic principles of chromatography and its importance in scientific analysis.
• Identify the different components of chromatography, including stationary and mobile phases.
• Explain how molecular polarity affects the separation of compounds.+ Show more

Learning Objectives

• Explain how energy moves through an ecosystem using producers, consumers, and decomposers
• Describe how photosynthesis supplies energy and how each trophic transfer reduces usable energy
• Interpret food chains and trophic levels to predict how changes at one level can affect others

Learning Objectives

• Explain how chloroplasts capture light energy and convert it into chemical energy during photosynthesis.
• Describe the roles of thylakoids and the stroma in forming ATP and NADPH and producing sugars.
• Connect chloroplast energy storage and starch production to plant energy needs and respiration in mitochondria.

Learning Objectives

• Describe common forms of energy and how they change in everyday systems
• Explain energy transformations while conserving total energy
• Identify where energy appears as mechanical, electrical, chemical, and thermal energy in a real-world example

Learning Objectives

• Define net force as the vector sum of all forces acting on an object.
• Describe how unbalanced forces cause changes in an object's motion.
• Use diagrams and reasoning to analyze the effects of forces, including friction and applied forces.+ Show more

Learning Objectives

• Understand the principles of mechanical advantage in design
• Analyze how structural choices affect safety and efficiency
• Evaluate different design options based on quantitative data+ Show more

Learning Objectives

• Define net force as the vector sum of all forces acting on an object and explain the effect of balanced vs. unbalanced forces on motion.
• Use free-body diagrams to identify forces (including applied forces and friction) and determine the direction of the net force.
• Describe how net force relates to acceleration and how mass affects acceleration using proportional reasoning within Grade 7 scope.

Learning Objectives

• Distinguish quantitative observations from qualitative observations in everyday science scenarios.
• Select appropriate metric units and common instruments for measuring length, mass, and volume.
• Describe how a scientific inquiry uses observations, questions, hypotheses, measurements, and evidence.+ Show more

Learning Objectives

• Explain how corrosion, rot/moisture uptake, freeze–thaw cycling, and UV degradation reduce material performance over time
• Identify protective measures (coatings, cathodic protection, concrete cover) and how they affect service lifespan
• Use bridge deck and exterior roofing examples to connect environmental exposure, inspection, and maintenance to long-term reliability

Learning Objectives

• Understand how clouds form through condensation and cooling.
• Identify different types of clouds based on height and appearance.
• Explain the process of precipitation and how water returns to Earth's surface.+ Show more

Learning Objectives

• Organize quantitative and qualitative observations into tables and appropriate graphs
• Interpret graphs by reading axes, scales, and trend patterns
• Use summary statistics (mean and median) to compare data sets and recognize outliers and uncertainty

Learning Objectives

• Describe energy flow and matter cycling within ecosystems using food chains, food webs, and trophic pyramids.
• Explain the roles of decomposers in nutrient recycling and how energy transfer efficiency affects ecosystems.
• Analyze how alterations in inputs or energy pathways can change community composition and ecosystem processes.+ Show more

Learning Objectives

• Explain how energy transfers from higher-energy systems to lower-energy systems.
• Identify ways energy can transform (such as thermal, kinetic, and light energy) during everyday events.
• Connect energy transfer to observable effects like temperature change, motion, and light emission.+ Show more

Learning Objectives

• Explain how optimization uses explicit criteria to compare design changes under constraints
• Identify common optimization metrics such as strength-to-weight ratio, operating cost, and energy conversion efficiency
• Evaluate tradeoffs by describing how improving one metric can affect other performance requirements+ Show more

Learning Objectives

• Explain how symbolic chemical equations, graphs, and tables can represent matter interactions without assuming microscopic causes
• Interpret quantitative relationships in graphs (e.g., mass or temperature vs. time) and connect them to other representations
• Use balanced equations to infer stoichiometric ratios and communicate what changes occur during a reaction

Learning Objectives

• Identify structures that increase surface area in cells
• Understand how surface area influences cell efficiency
• Explore adaptations that enhance material exchange in cells+ Show more

Learning Objectives

• Explain how reliability and variability affect the confidence of scientific conclusions.
• Identify common sources of measurement and interpretation error in experimental data.
• Use patterns in repeated measurements to decide whether evidence supports design changes.

Learning Objectives

• Explain how energy flows through trophic levels in an ecosystem and how that flow decreases across levels.
• Describe how matter cycles through ecosystems and how nutrient availability affects organism survival and biomass.
• Predict how changes in decomposition conditions, plant growth, or resource inputs can cause cascading effects on consumer populations.+ Show more

Learning Objectives

• Explain how momentum depends on mass and velocity and how momentum transfers during collisions.
• Use conservation of momentum to predict motion after one-dimensional impacts.
• Differentiate elastic and inelastic collisions using changes in kinetic energy and the meaning of “equal and opposite” contact forces.

Learning Objectives

• Use microscopy observations to explain how cells provide direct evidence that organisms are made of discrete cellular units
• Compare unicellular and multicellular organization using cell boundaries, tissues, and examples such as onion epidermis and protists
• Interpret cell structures (cell walls, plasma membranes, nuclei, cytoplasm, vacuoles) and connect them to what is seen under a microscope

Learning Objectives

• Explain the role of calorimetry and energy conservation in predicting heat transfer.
• Use q = m · c · ΔT to relate temperature changes to energy transfer in joules.
• Identify how heat flows during melting, heating, and heat losses in real-world thermal scenarios.

Learning Objectives

• Understand the principle of conservation of mass in closed systems.
• Identify how mass is conserved during chemical reactions.
• Calculate mass relationships between reactants and products.+ Show more

Learning Objectives

• Differentiate weather from climate and explain why climate is based on long-term patterns
• Identify major climate drivers such as solar energy, atmospheric circulation, and the distribution of water
• Explain how ocean heat storage and release can influence regional climate trends+ Show more

Learning Objectives

• Identify the main idea and key details about ecological inquiry.
• Explain what makes an ecological question testable.
• Describe measurable variables and how evidence supports conclusions.

Learning Objectives

• Explain how producers use light, carbon dioxide, and water to make sugars during photosynthesis
• Describe how the products of photosynthesis store energy in chemical bonds within biomass
• Connect photosynthesis to energy flow and matter transfer through food chains+ Show more

Learning Objectives

• Explain the process of convection and how it transfers heat in fluids.
• Identify natural and forced convection examples in real-world scenarios.
• Describe boundary layers, buoyancy forces, and flow patterns related to convection.+ Show more

Learning Objectives

• Explain how engineering designs respond to intended function and real-world constraints.
• Describe how loads and forces distribute through structural and mechanical systems (e.g., bridges and pulleys).
• Identify how circuits transfer electrical energy and how design choices affect safety and reliability.+ Show more

Learning Objectives

• Understand predator and prey relationships
• Identify examples of predator-prey interactions in ecosystems
• Explain the importance of predator-prey dynamics in maintaining ecological balance

Learning Objectives

• Explain how cells convert chemical energy in food into usable energy for life processes
• Describe how energy changes form during cellular activities without creating or destroying matter
• Use examples such as movement, active transport, and maintaining body temperature to connect energy use to cellular processes

Learning Objectives

• Understand how shear force is distributed along beams under various loads.
• Identify the effects of shear forces on structural stability.
• Learn to interpret shear diagrams and their implications for design.

Learning Objectives

• Identify and distinguish mutualism, commensalism, and parasitism using key features
• Explain how symbiosis relationships affect population size, resource use, and survival
• Use examples from Alberta habitats to describe real-world ecological consequences

Learning Objectives

• Identify the main idea and key details about ecological organization at the organism level
• Distinguish traits of individual organisms from patterns that show up at higher levels
• Explain how a trait in an individual may or may not predict what happens in a population

Learning Objectives

• Explain how calibration and traceable reference standards improve the accuracy of temperature measurements.
• Identify common sources of measurement error, including response time, spatial placement, radiation effects, and thermal contact.
• Use uncertainty and resolution concepts to interpret temperature readings appropriately.+ Show more

Learning Objectives

• Identify the main components of a cell
• Understand the functions of cell membranes, nuclei, mitochondria, and organelles
• Recognize the diversity of cell structures in plants and animals

Learning Objectives

• Explain how food molecules are broken down and rearranged into new molecules needed for growth and repair.
• Describe how chemical energy in food becomes usable energy for life processes.
• Connect nutrition choices to changes in body condition over time.