Grade 7 Science Worksheets

Learning Objectives

• Understand the principles of relative dating such as superposition, original horizontality, and cross-cutting relationships
• Identify markers in rock layers used for correlating strata
• Explain how fossil assemblages, unconformities, and intrusive contacts help establish the age of rock layers+ Show more

Learning Objectives

• Understand what forces are and how they act on objects
• Identify different types of forces such as push, pull, friction, and gravity
• Learn how forces affect the motion of objects, including speed, direction, and rest+ Show more

Learning Objectives

• Understand the distribution and significance of natural resources in Earth systems.
• Describe the processes of groundwater flow, aquifer recharge, and soil formation.
• Differentiate between renewable and nonrenewable resources in various geologic settings.+ Show more

Learning Objectives

• Differentiate homogeneous mixtures from heterogeneous mixtures based on particle distribution and observable properties
• Describe solubility and concentration using the concepts of unsaturated, saturated, and supersaturated solutions
• Explain how particle size relates to solutions, colloids, and suspensions and how separation methods depend on those differences+ Show more

Learning Objectives

• Understand the role of decomposers in ecosystems
• Identify different decomposers such as fungi and bacteria
• Explain the process of decomposition and nutrient recycling+ Show more

Learning Objectives

• Explain how differences in physical properties such as density and solubility can be used to separate mixtures.
• Distinguish physical changes from chemical changes by describing whether new substances form.
• Predict how matter will separate or change form when conditions like heating or dissolving are applied.

Learning Objectives

• Understand how gears transfer motion and change speed or torque.
• Identify parts of a gear system.
• Explain the function of gears in machines.+ Show more

Learning Objectives

• Explain that acceleration describes how quickly velocity changes, including whether the change is positive or negative relative to a chosen direction.
• Use Newton’s second law (Fnet = m·a) to connect net force, mass (inertia), and acceleration.
• Distinguish constant acceleration from changing acceleration by interpreting patterns on velocity–time descriptions.

Learning Objectives

• Compare thermal conductivity in metals, ceramics, polymers, and composites based on their internal structure.
• Explain how free electrons and lattice vibrations contribute to heat transfer in different materials.
• Describe how density, porosity, and moisture affect a material’s effective thermal conductivity.

Learning Objectives

• Explain how matter and energy move among the geosphere, hydrosphere, atmosphere, and biosphere
• Describe how a change in one Earth system can trigger changes in other systems
• Use examples to predict how Earth system interactions can affect landforms and water availability

Learning Objectives

• Understand how Earth's tilt affects the Sun's apparent position and daylight hours during different seasons.
• Explain the reasons for opposite seasons in the Northern and Southern hemispheres.
• Describe how the distribution of solar energy varies throughout the year due to Earth's tilt and orbit.+ Show more

Learning Objectives

• Identify key durability factors that reduce material performance over time, including corrosion, rot/moisture uptake, freeze–thaw damage, and UV degradation.
• Explain how protective measures (coatings, cathodic protection, and concrete cover) reduce damage in service environments.
• Interpret how maintenance intervals and exposure conditions influence expected lifespan of structures.

Learning Objectives

• Understand different types of graphs used in scientific data presentation
• Recognize when to use bar charts, histograms, line graphs, and scatter plots
• Interpret elements of graphs such as axes, trend lines, and error bars+ Show more

Learning Objectives

• Explain how meiosis creates genetic variation through independent assortment and random fertilization.
• Identify key events in meiosis that lead to differences among offspring.
• Use cause-and-effect reasoning to connect chromosome behavior in meiosis to traits in populations.

Learning Objectives

• Explain the mechanisms that lead to speciation, including reproductive isolation and geographic separation.
• Describe examples of biodiversity arising from speciation, such as cichlid radiations and plant polyploidy.
• Analyze how environmental changes influence the rates and patterns of species formation.+ Show more

Learning Objectives

• Describe the main processes in the water cycle, including evaporation, condensation, precipitation, infiltration, runoff, and groundwater flow.
• Explain how solar energy and gravity drive movement of water among Earth’s spheres.
• Model how water moves through a river basin and into oceans, and how groundwater contributes to springs.+ Show more

Learning Objectives

• Understand the roles of supports, foundations, and load paths in structures
• Learn about compression, tension, and shear forces and their effects on beams, columns, and foundations
• Evaluate material properties such as stiffness, strength, and durability for structural safety under various conditions

Learning Objectives

• Understand the particle model as a framework for explaining matter's properties.
• Describe how particle spacing, motion, and forces relate to observable bulk properties.
• Connect micro-scale particle interactions to measurements like diffusion, expansion, and compressibility.+ Show more

Learning Objectives

• Understand major human-induced alterations to ecosystems and their examples.
• Identify the effects of habitat fragmentation, pollution, and invasive species on biodiversity.
• Describe approaches for ecosystem restoration and mitigation.+ Show more

Learning Objectives

• Understand the basic concepts of mixtures and their separation methods.
• Identify physical and chemical separation techniques used in extracting bitumen.
• Differentiate between physical and chemical processes in mixture treatment.

Learning Objectives

• Explain how microscopic particle motion relates to temperature and average random kinetic energy.
• Differentiate between temperature and thermal energy using particle number and phase.
• Use particle-collision ideas to describe how thermal changes can affect pressure.+ Show more

Learning Objectives

• Understand how fire as a disturbance impacts forest habitats
• Identify both positive and negative effects of forest fires
• Learn about the role of disturbance regimes in ecological succession+ Show more

Learning Objectives

• Understand the iterative nature of the technological design process.
• Identify key steps such as problem definition, criteria setting, brainstorming, prototyping, evaluation, and optimization.
• Recognize examples like water filtration, electrical circuits, and mechanisms to illustrate trade-offs and refinement.+ Show more

Learning Objectives

• Identify different types of friction
• Explain how surface textures influence resistance
• Describe how air resistance affects moving objects+ Show more

Learning Objectives

• Understand the concept of scientific models and how they predict outcomes.
• Identify evidence used to evaluate the accuracy of models.
• Learn how to interpret computational simulations in model evaluation.+ Show more

Learning Objectives

• Describe the processes involved in the water cycle, including evaporation, condensation, and precipitation.
• Explain how water moves through Earth's spheres via processes like infiltration, runoff, and groundwater flow.
• Identify the interactions between different components of the water cycle, such as river discharge and groundwater contributions.+ Show more

Learning Objectives

• Explain how beams and cantilevers respond to loads through bending and shear and how these affect deflection and serviceability.
• Describe how axial force and torsion act in structural members like columns and truss bars, and compare dominant internal-force types.
• Relate geometry (span/shape) and support/load placement to internal force distribution in roof trusses and cantilevered balconies.

Learning Objectives

• Understand how Earth's rotation causes day and night
• Describe the cycle of day and night as observed from Earth's surface
• Identify the tilt of Earth's axis and its role in solar patterns

Learning Objectives

• Describe the three principal boundary types and their characteristic landforms.
• Explain how divergent boundaries create mid-ocean ridges and rift valleys.
• Identify features associated with convergent boundaries, such as subduction zones and folded mountains.+ Show more

Learning Objectives

• Understand how patterns in data can indicate reliability.
• Identify sources of error that affect experimental results.
• Develop reasoning skills to interpret variability and measurement quality.+ Show more

Learning Objectives

• Explain how cells convert the chemical energy in food into usable energy for life functions
• Describe how ATP helps cells transfer and use energy during cellular processes
• Distinguish between conservation of energy and conservation of matter in cellular energy use+ Show more

Learning Objectives

• Identify and describe different trophic levels in a food web
• Explain how energy is transferred between trophic levels
• Understand why energy decreases as it moves through the food chain+ Show more

Learning Objectives

• Classify mixtures as solutions, colloids, or suspensions using particle size and uniformity.
• Explain how light scattering and stability help distinguish mixture types.
• Predict how mixtures behave during simple separation processes.

Learning Objectives

• Explain how different temperature measurement instruments work and what ranges they are most suitable for.
• Use Celsius scale conventions, including fixed points and interval meaning, to interpret temperature readings.
• Describe how calibration, thermal contact, and environmental factors affect measurement accuracy and uncertainty.+ Show more

Learning Objectives

• Explain how internal (endogenetic) processes such as uplift, deformation, earthquakes, and volcanism can reshape Earth’s surface.
• Describe how external (exogenetic) processes such as erosion and sediment transport can build landforms like deltas and floodplains.
• Interpret surface-process evidence using rock strata, landform patterns, and connections to hazard histories.

Learning Objectives

• Construct evidence-based scientific arguments using claims, evidence, and reasoning that are logically coherent.
• Critique and compare argumentation models by evaluating data quality, graphical representations, and limits of inference.
• Use quantitative results and model-based explanations to support or refute a hypothesis while citing sources of information.

Learning Objectives

• Understand how measurement tools have resolution limits affecting data accuracy.
• Explain the concept of uncertainty in repeated measurements and data interpretation.
• Interpret graphs and tables that include ranges or error estimates to evaluate data significance.+ Show more

Learning Objectives

• Distinguish between physical and chemical properties of materials using quantitative and qualitative descriptors.
• Identify examples of properties such as density, melting point, solubility, electrical conductivity, reactivity, and flammability.
• Analyze property data to support material identification and separation strategies.+ Show more

Learning Objectives

• Define trophic levels and understand their roles in ecosystems
• Explain the concept of energy transfer between trophic levels
• Describe why energy diminishes at higher trophic levels+ Show more

Learning Objectives

• Evaluate tradeoffs among freshwater sources and treatment options using cost, reliability, energy use, water quality, and environmental impacts.
• Identify constraints that affect water system design, such as infrastructure limits, pollution risk, and altered flow patterns.
• Explain how designs can reduce risk from scarcity and contamination while supporting long-term sustainability.

Learning Objectives

• Analyze test data and parameters to refine and improve design solutions.
• Use quantitative comparisons to evaluate design modifications.
• Apply iterative adjustment techniques based on performance data.+ Show more

Learning Objectives

• Explain how plate tectonics can cause rapid geologic hazards such as earthquakes and volcanic eruptions
• Describe how weathering, erosion, and deposition reshape Earth’s surface over longer timescales
• Use evidence (fault features, lava flows, ash layers, sediment layers) to connect geologic processes to landforms+ Show more

Learning Objectives

• Understand the importance of wetlands for biodiversity
• Learn management strategies like wetland restoration and habitat corridors
• Evaluate benefits and potential unintended consequences of conservation methods+ Show more

Learning Objectives

• Explain how births, deaths, immigration, and emigration change population size over time.
• Describe limiting factors and how competition for resources affects population growth.
• Use predator–prey relationships and resource availability to interpret changes in population size.+ Show more

Learning Objectives

• Understand how matter is conserved during physical and chemical changes.
• Identify examples of physical vs. chemical changes.
• Explain the importance of mass conservation in scientific observations.+ Show more

Learning Objectives

• Explain how models use abstraction and assumptions to represent real-world systems.
• Identify how parameters and units affect numerical models.
• Describe how to validate a model by comparing predictions with empirical observations.+ Show more

Learning Objectives

• Describe the steps of the design process from requirements and constraints to generating and selecting concepts using criteria.
• Explain how performance objectives such as load capacity, stiffness, and serviceability guide engineering decisions.
• Use decision matrices, sketches, and trade-off reasoning to compare design alternatives and choose preferred solutions.

Learning Objectives

• Identify major parts of a cell (membrane, cytoplasm, nucleus, mitochondria, and other organelles) and describe their general functions.
• Explain how cells’ structures help them carry out specialized roles in living organisms.
• Compare plant and animal cell characteristics using evidence from cell structures.