Grade 7 Science Worksheets

Learning Objectives

• Understand the different types of phase changes and their characteristics.
• Describe how energy transfer causes changes between solid, liquid, and gas states.
• Explain the concepts of melting, freezing, vaporization, condensation, sublimation, and deposition.+ Show more

Learning Objectives

• Explain the processes involved in evaporation and crystallization of solutes.
• Identify factors that influence crystal size, shape, and purity.
• Describe real-world applications of crystallization such as salt production and sugar refining.+ Show more

Learning Objectives

• Explain how protons, neutrons, and electrons determine atomic identity and isotopic variation
• Relate atomic number and mass number to element identity and an isotope’s nucleus
• Describe basic electron arrangements and connect simple atomic models to observable patterns

Learning Objectives

• Understand how air masses and fronts influence weather patterns.
• Identify the characteristics of different air masses and types of fronts.
• Explain how boundaries between air masses lead to weather changes such as storms and precipitation.+ Show more

Learning Objectives

• Identify examples of biotic factors in ecosystems
• Identify examples of abiotic factors in ecosystems
• Explain how biotic and abiotic factors influence habitats+ Show more

Learning Objectives

• Understand how habitat fragmentation affects ecosystems and species.
• Identify the consequences of habitat fragmentation on biodiversity.
• Analyze strategies like corridors to mitigate habitat fragmentation effects.+ Show more

Learning Objectives

• Identify variables that can influence scientific experiments involving plant germination.
• Understand methods to control and manage variables such as randomization, blocking, and replication.
• Explain the importance of systematic variable control for obtaining reliable experimental results.+ Show more

Learning Objectives

• Identify and describe the functions of key organelles in plant and animal cells.
• Understand the differences between eukaryotic and prokaryotic cells.
• Connect cell structure features with their roles in processes like transport, synthesis, and compartmentalization.+ Show more

Learning Objectives

• Explain how habitat fragmentation, pollution, and invasive species change ecosystems.
• Describe how human activities can alter abiotic conditions and shift biodiversity and trophic structure.
• Evaluate how mitigation and restoration actions affect ecosystem recovery over time.

Learning Objectives

• Understand the cause-and-effect relationships in predator-prey interactions.
• Identify how changes in predator or prey populations affect community composition.
• Explain feedback mechanisms in ecological systems.+ Show more

Learning Objectives

• Explain how meiosis produces genetically different reproductive cells
• Describe how crossing over and independent assortment increase genetic variation
• Connect genetic variation from meiosis to why siblings are not identical and to evolution over time

Learning Objectives

• Understand different types of atomic models and their representations.
• Identify the relationship between subatomic particles, atomic number, and chemical formulas.
• Distinguish between molecular structures and extended network structures based on bonding patterns.+ Show more

Learning Objectives

• Understand the process of diffusion across cell membranes
• Identify the differences between passive and active transport mechanisms
• Explain how water moves through osmosis+ Show more

Learning Objectives

• Interpret how slope and curvature in position-time graphs relate to velocity and changing velocity
• Interpret how slope in velocity-time graphs relates to acceleration
• Use correct graph patterns to describe constant velocity and changing motion

Learning Objectives

• Define ecosystem components and distinguish biotic from abiotic factors in a habitat.
• Describe trophic categories (producers, consumers, decomposers) and their general roles.
• Explain how energy flows from sunlight to organisms and how matter cycles through ecosystems.+ Show more

Learning Objectives

• Explain how structural, behavioral, and physiological adaptations help organisms survive and perform life processes.
• Match adaptations to their functions, such as protection, exchange, and water regulation.
• Describe trade-offs and how improving one ability can limit another.

Learning Objectives

• Identify how the atmosphere, hydrosphere, geosphere, and biosphere interact as part of Earth’s system
• Explain how water, gases, and rock surfaces move between spheres and affect living things
• Use evidence to describe cause-and-effect relationships across Earth’s spheres

Learning Objectives

• Define morphological, physiological, and behavioral adaptations and identify examples in real organisms.
• Explain how traits improve survival and reproductive success in specific environments.
• Differentiate adaptations from acclimation and describe adaptive trade-offs.+ Show more

Learning Objectives

• Explain how chromatography separates mixtures using a stationary phase and a mobile phase.
• Describe how molecular polarity and differential partitioning lead to different migration distances.
• Interpret retention factors (Rf) and use resolution ideas to compare separations.+ Show more

Learning Objectives

• Understand the concept of ecological models
• Identify components of ecological models
• Differentiate between conceptual and quantitative models+ Show more

Learning Objectives

• Explain how geologic evidence (fossils, rock types, seafloor structures) supports the theory of plate tectonics.
• Identify key features of tectonic plate boundaries, including trenches, mid-ocean ridges, and earthquake/volcano patterns.
• Describe how magnetic striping and continental reconstructions (such as Pangaea) help infer plate motion.

Learning Objectives

• Explain how net force affects an object's motion (speeding up, slowing down, changing direction, or staying at rest).
• Differentiate between balanced forces (net force of zero) and unbalanced forces (net force not zero).
• Use everyday examples to identify the direction and effect of forces like friction and gravity.

Learning Objectives

• Explain how fitness relates to survival and reproduction in a particular environment
• Describe how environmental changes can change which heritable traits are favored by natural selection
• Connect fitness outcomes to variation within a population and changing selection pressures

Learning Objectives

• Understand how microscopic particles move and what factors influence their speed
• Explain the relationship between particle motion and temperature
• Describe how particle behavior affects thermal energy and pressure+ Show more

Learning Objectives

• Understand the concept of biodiversity and its different types
• Identify methods used to measure biodiversity such as richness, evenness, and habitat heterogeneity
• Explain the significance of biodiversity indices in assessing ecosystem health+ Show more

Learning Objectives

• Describe how engineered timber, fibre-reinforced polymers, and high-performance concrete are made and why they are stronger or more durable.
• Explain how microstructure and manufacturing choices affect strength, stiffness, and durability.
• Evaluate trade-offs among cost, fabrication complexity, and performance in real construction and retrofit situations.+ Show more

Learning Objectives

• Understand how natural records like ice cores provide evidence of past climate conditions.
• Identify different natural indicators used to assess historical climate changes.
• Learn about the impact of long-term climate drivers on Earth's energy balance and circulation.+ Show more

Learning Objectives

• Compare scaled physical models, digital finite-element models, and laboratory load rigs for testing strength, stiffness, and failure modes.
• Explain how strain gauges and displacement transducers are used to measure structural response during prototyping.
• Describe limitations of scaling, including effects of material heterogeneity and joint behavior.

Learning Objectives

• Describe how an inclined plane changes the force needed to move a load.
• Identify the component of force parallel and perpendicular to a ramp surface.
• Calculate mechanical advantage using input force and load (in simple examples).+ Show more

Learning Objectives

• Identify independent, dependent, and controlled variables in real experimental scenarios.
• Create clear operational definitions for variables so measurements are consistent and replicable.
• Design fair tests by controlling confounding variables, using control groups, and planning replication.

Learning Objectives

• Explain the basic concept of gravity and how it pulls objects toward each other.
• Identify how gravity influences the motion of planets, moons, and satellites.
• Recognize observational evidence of gravitational effects in space.+ Show more

Learning Objectives

• Explain how weathering, erosion, transport, and deposition change Earth’s surface over short and long timescales.
• Compare mechanical vs. chemical weathering and identify agent-specific clues in landscapes and soil profiles.
• Describe how water, wind, ice, and coastlines can create or modify landforms such as canyons, moraines, and deltas.

Learning Objectives

• Understand what air masses are and how they form.
• Identify different types of fronts and their features.
• Explain how air masses and fronts affect weather conditions.

Learning Objectives

• Explain how nonliving factors (temperature, light, water availability, soil characteristics, and salinity) limit which species can survive in an area
• Describe how gradients and microclimates affect organisms’ physiological tolerances and seasonal patterns
• Use terrestrial and aquatic examples to connect abiotic variability to habitat suitability and community composition

Learning Objectives

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

Learning Objectives

• Interpret position-time graphs by using slope to determine velocity and curvature to identify changing velocity
• Interpret velocity-time graphs by using slope to determine acceleration
• Use data tables with motion graphs to support conclusions about constant versus changing motion+ Show more

Learning Objectives

• Understand how mathematical representations support explanations of evolutionary processes.
• Interpret statistical analyses related to trait frequencies, selection coefficients, and population dynamics.
• Apply Hardy-Weinberg principles and rate calculations to real-world genetic data.+ Show more

Learning Objectives

• Explain how fossils can preserve remains, traces, and imprints of ancient organisms.
• Describe how fossil assemblages and sediment layers provide evidence about past environments and Earth history.
• Use fossil types and rock-layer clues to make claims about where and when organisms lived.

Learning Objectives

• Understand the concept of exponential population growth
• Identify the characteristics of exponential growth models
• Distinguish between exponential and logistic growth+ Show more

Learning Objectives

• Identify potential and kinetic energy in different situations
• Understand how energy changes during motion and elevation
• Analyze real-world examples of energy transfer and conservation+ Show more

Learning Objectives

• Explain how diffusion happens due to the random motion of particles moving from higher concentration to lower concentration.
• Describe how mixing occurs without particles stopping or changing into new substances.
• Predict how temperature affects the rate of diffusion using the particle model.

Learning Objectives

• Explain how detritivores, fungi, and bacteria contribute to decomposition and nutrient cycling.
• Describe how carbon and nitrogen are transformed during decomposition.
• Evaluate how abiotic factors (temperature, moisture, oxygen, and chemistry of matter) affect decomposition rates and soil fertility.

Learning Objectives

• Understand how seasonal thermal cycles influence energy storage and transfer in regional environments.
• Identify the roles of solar input, albedo variation, and latent heat in climate patterns.
• Explain how radiative, latent, and sensible energy fluxes combine to affect ecosystems and landscapes.+ Show more

Learning Objectives

• Understand the importance of foundations in supporting structures
• Identify different types of structural loads such as compression, tension, and shear
• Recognize the roles of supports in ensuring stability of buildings+ Show more

Learning Objectives

• Explain how variation, heritability, and selective pressures can change allele frequencies across generations.
• Use examples such as pesticide resistance and camouflage to describe differential survival and reproduction.
• Predict how environmental change can shift which adaptive traits become common in a population.

Learning Objectives

• Understand how melting point compares indicate purity
• Identify how conductivity changes are related to purity
• Recognize various methods used to assess material contamination+ Show more

Learning Objectives

• Understand the principles of ecological inquiry and hypothesis formulation.
• Identify measurable variables in ecological studies.
• Interpret ecological data and evidence critically.+ Show more

Learning Objectives

• Explain how exponential and logistic population models describe population change over time.
• Identify how carrying capacity and density-dependent and density-independent factors affect population growth.
• Use models to make predictions about population patterns in real ecosystems.