Grade 7 Science Worksheets

Learning Objectives

• Explain how birth rates, death rates, immigration, and emigration influence population size and distribution
• Describe how abiotic constraints and resource availability can limit population growth in different regions
• Use examples (prairies, boreal forests, disease outbreaks, and human land-use change) to predict how populations can fluctuate+ Show more

Learning Objectives

• Explain how wetlands provide hydrological, chemical, and biological functions in an ecosystem
• Describe how wetlands support water storage, nutrient cycling, and habitat for wildlife
• Compare functional roles of different wetland types (e.g., peatlands and marsh complexes)

Learning Objectives

• Explain equilibrium as the condition where net force is zero and motion does not change
• Distinguish static equilibrium from dynamic equilibrium using examples from structures and motion
• Identify balanced and unbalanced force pairs and describe how they affect safety and design

Learning Objectives

• Explain how beams bend, shear, and deflect when loads are applied
• Describe how span, support conditions, and load types affect beam performance
• Use span-to-depth ratio, material stiffness, and service load ideas to judge stability and comfort

Learning Objectives

• Explain how kinetic and potential energy are related to motion using elevation, mass, and speed.
• Describe energy transfer and conservation in mechanical systems without creating or destroying energy.
• Use qualitative reasoning to predict how changing height or speed affects mechanical energy.+ Show more

Learning Objectives

• Explain how push and pull interactions create forces that can change an object's motion
• Differentiate between contact forces and non-contact forces using examples
• Describe how net force influences acceleration (speeding up, slowing down, or changing direction)

Learning Objectives

• Explain how static and kinetic friction oppose relative motion and affect acceleration and stopping distance.
• Describe aerodynamic drag as a force that opposes motion through air and influences speed of moving objects.
• Connect surface texture and normal force to changes in the frictional coefficient and real-world movement outcomes.

Learning Objectives

• Interpret distance–time and speed–time graphs by relating graph features to motion in real situations.
• Explain how slope and area under a speed–time graph connect to instantaneous and average rates.
• Translate tabulated measurements into graphs and make quantitative conclusions from them.

Learning Objectives

• Use integrated systems analysis to compare design options using mechanical advantage, materials, and structural safety.
• Connect force and motion data to machine function and structural evaluation in real-world scenarios (wind, snow, and load).
• Justify a design choice using evidence from mechanical calculations and safety criteria.

Learning Objectives

• Explain how inclined planes reduce the required input force by increasing the distance over which the force acts.
• Identify and interpret force components parallel to and perpendicular to the slope.
• Calculate and compare mechanical advantage using input force and load.

Learning Objectives

• Describe motion using distance, time, and speed, including correct units
• Calculate average speed using distance and time and interpret results
• Identify common sources of measurement error and explain how they affect motion data+ Show more

Learning Objectives

• Explain how a lever changes force and direction of a push or pull using fulcrum placement and lever arms.
• Describe how pulley systems can increase mechanical advantage and change the direction of force.
• Calculate and compare input (effort) and output (load) forces using simple mechanical advantage relationships.

Learning Objectives

• Explain how strength, stiffness, density, and environmental resilience affect material selection for load-bearing structures.
• Describe how materials behave under compression, tension, and bending and how that impacts long-term performance and maintenance.
• Use evidence from local conditions (frost and snow) to justify material choices for beams, bridges, and foundations.

Learning Objectives

• Draw and interpret free-body diagrams to represent forces acting on an object
• Determine net force direction and magnitude by combining perpendicular force components
• Identify how friction, normal force, and gravity affect motion on an incline

Learning Objectives

• Explain how simple machines change the magnitude or direction of a force to make work easier
• Describe the roles of levers, pulleys, wedges, screws, inclined planes, and wheel-and-axles in everyday tools
• Calculate mechanical advantage from input and output forces and interpret what the result means

Learning Objectives

• Explain how supports and foundations help buildings resist loads through load paths.
• Identify how compression, tension, and shear influence different structural members.
• Describe how stiffness, strength, and durability are used to judge structural safety under wind and snow loads.

Learning Objectives

• Explain how the particle model uses discrete particles, spaces, and motion to describe matter
• Connect particle behavior to observable properties and state changes (such as density, diffusion, evaporation, and condensation)
• Differentiate physical rearrangements from chemical transformations using particle interactions

Learning Objectives

• Explain how truss members form internal force paths of tension and compression
• Use the method of joints concept to reason about forces in individual truss members
• Compare common truss forms (e.g., king post, queen post, and Pratt) by their structural efficiency and redundancy+ Show more

Learning Objectives

• Explain how physical separation can separate components of oil sands using density and particle size.
• Describe how chemical treatment and temperature changes affect emulsions and dissolved organics.
• Classify processing steps as physical versus chemical changes in bitumen extraction.

Learning Objectives

• Explain how phase changes relate to particle kinetic energy and potential energy
• Describe how energy is absorbed or released during melting, freezing, evaporation, and condensation
• Interpret latent heat as an energy change that occurs without changing chemical identity+ Show more

Learning Objectives

• Identify observable evidence that a chemical change has occurred.
• Explain, using a particle-level model, how bonds can break and form during a chemical change.
• Distinguish chemical changes from physical changes based on whether new substances form.

Learning Objectives

• Use mass conservation to build simple mass budgets for closed or near-closed science systems.
• Explain how reaction stoichiometry and waste/environmental accounting apply conservation of mass.
• Analyze measured versus expected masses and suggest plausible reasons for differences.

Learning Objectives

• Explain conservation of mass in terms of atoms being conserved in a closed system.
• Predict whether total mass changes by comparing masses of reactants and products when nothing enters or leaves.
• Use sealed-container observations to support claims about conservation of mass during physical or chemical changes.

Learning Objectives

• Classify matter as a pure substance (element or compound), a mixture, or a solution based on its properties and uniformity.
• Explain how fixed composition and characteristic melting points help identify elements and compounds.
• Describe how mixtures and solutions differ in composition and particle scale (visible vs molecular level).

Learning Objectives

• Explain how conservation of mass applies to closed-system chemical reactions.
• Use mass accounting to relate reactant masses to product masses.
• Interpret theoretical vs. measured mass distributions to assess reaction completeness.+ Show more

Learning Objectives

• Identify signs of a physical change by linking particle behavior to observable properties.
• Explain how phase transitions and dissolving can occur without changing chemical identity.
• Use mass conservation in closed systems to support whether a change is physical.

Learning Objectives

• Explain why pure substances have uniform composition and characteristic properties such as fixed melting/boiling points.
• Differentiate elements and compounds using physical and chemical evidence.
• Identify how impurities and multiple constituents change observed properties when comparing to pure substances.

Learning Objectives

• Identify common observable indicators of chemical reactions, such as gas production, heat exchange, colour changes, and precipitate formation.
• Describe reaction evidence using clear scientific language and connect observations to possible particle interactions and mass changes.
• Interpret qualitative evidence to make reasonable predictions about reaction types and the extent of a reaction.

Learning Objectives

• Explain what it means for a solution to be saturated at a specific temperature and pressure
• Describe how solubility limits determine whether solute stays dissolved or forms a solid
• Differentiate saturated and supersaturated conditions and predict what happens when conditions change+ Show more

Learning Objectives

• Explain how physical properties (particle size, solubility, magnetism, boiling point) can be used to separate mixtures without changing chemical identity
• Match common separation techniques to the physical property differences they exploit
• Interpret separation efficiency by linking observations (what remains vs. what is removed) to the type of material in a mixture

Learning Objectives

• Explain how solubility depends on the nature of the solute and solvent.
• Describe how temperature, pressure (for gases), and surface area affect dissolving.
• Connect particle size and agitation to the rate and extent of dissolution.

Learning Objectives

• Explain how conduction transfers kinetic energy in solids through particle-to-particle collisions
• Compare how different materials conduct heat using conductivity ideas
• Describe how interfaces, material contact, and contact resistance influence heat flow and temperature gradients+ Show more

Learning Objectives

• Explain how building orientation, the thermal envelope, and mechanical systems affect heat flow and seasonal energy use.
• Identify design strategies that improve comfort and reduce thermal bridges in cold Alberta climates.
• Describe trade-offs between upfront materials and ongoing energy/comfort needs.

Learning Objectives

• Explain how convection transports heat through fluid motion caused by temperature and density differences.
• Distinguish natural convection from forced convection and describe real-world examples.
• Use boundary-layer and buoyancy ideas to predict how heat transfer patterns can change with conditions.

Learning Objectives

• Explain how natural selection changes the frequency of traits in a population over many generations.
• Distinguish inherited variation from traits gained during an individual’s lifetime.
• Use evidence from examples (like antibiotic resistance) to describe survival and reproduction differences.

Learning Objectives

• Explain how energy can change forms (mechanical, chemical, electrical, and thermal) while total energy is conserved.
• Use cause-and-effect reasoning to describe energy transformations in everyday systems.
• Identify examples of energy transformations, including hydroelectric and wind power, and combustion for heating.+ Show more

Learning Objectives

• Explain the meaning of specific heat capacity and how it relates to thermal energy changes.
• Use the heat equation Q = m c ΔT with correct units (grams, degrees Celsius, Joules or kilojoules).
• Convert between Joules and kilojoules and interpret temperature-change measurements.

Learning Objectives

• Explain how births, deaths, immigration, and emigration change population size over time
• Describe limiting factors and how they can slow or speed population growth
• Connect predator-prey relationships to changes (oscillations) in population numbers

Learning Objectives

• Explain how insulation reduces heat transfer between inside and outside environments.
• Relate R-value, thickness, and construction details to thermal resistance and comfort.
• Describe how thermal bridges and air leaks can increase heat flow even when insulation is present.+ Show more

Learning Objectives

• Use an energy budget to connect conduction, convection, and radiation to system energy performance
• Apply conservation of energy to compare net heat gain and required fuel energy in building or district heating systems
• Interpret how storage and conversion losses affect predicted temperature responses

Learning Objectives

• Explain how thermal conductivity and specific heat capacity affect heat flow through common building materials
• Use material properties such as density and porosity to predict how moisture and temperature change in building assemblies
• Compare trade-offs between insulation performance and structural considerations for Alberta climates

Learning Objectives

• Explain how seasonal solar energy input and surface properties (like snow cover) affect temperatures and energy budgets.
• Describe how energy transformations (radiative, sensible, and latent heat) drive freeze-thaw dynamics, snowpack insulation, and lake stratification.
• Interpret how energy storage and release during the seasons influences ecosystems in different regions.

Learning Objectives

• Explain how average particle kinetic energy is related to temperature.
• Describe how thermal energy depends on both particle motion and number of particles.
• Use the particle model to connect microscopic motion to pressure and thermal changes.

Learning Objectives

• Use specific heat, mass, and temperature change to quantify energy transfer in Joules and kilojoules.
• Explain how thermal energy calculations connect to practical situations and energy budgets.
• Interpret basic claims about heating, melting, and energy units using quantitative reasoning.

Learning Objectives

• Explain how energy inputs, useful outputs, and losses can be traced in system models
• Use energy flow ideas (including waste heat) to discuss conservation of energy in real systems
• Interpret simple Sankey-style energy pathways and calculate or compare conversion efficiency

Learning Objectives

• Explain how radiant transfer moves energy using electromagnetic waves without needing matter contact.
• Describe how solar radiation intensity, surface absorptivity, and emissivity affect net radiative heating and cooling.
• Apply emissivity and absorptivity ideas to predict daytime warming and nocturnal cooling of landscapes and buildings.

Learning Objectives

• Explain how temperature relates to average kinetic energy and how heat relates to energy transfer.
• Describe how heat moves from warmer to cooler objects through conduction, convection, and radiation.
• Use Alberta winter/practice examples to connect thermal transfer to real-world situations.

Learning Objectives

• Explain what acceleration means in terms of changing velocity over time.
• Identify constant vs changing acceleration from patterns in velocity values.
• Describe how net force and mass affect acceleration using the idea of inertia.