Grade 7 Science Worksheets

Learning Objectives

• Understand the analytical indicators used to assess material purity.
• Identify methods to detect contamination in chemical samples.
• Compare different techniques such as melting points, conductivity, and gravimetric analysis.+ Show more

Learning Objectives

• Explain how matter and energy move through ecosystems using producers, consumers, and decomposers
• Describe how energy transfers through food chains and food webs and why less energy reaches higher trophic levels
• Connect the roles of metabolism and heat loss to patterns of energy flow in ecosystems+ Show more

Learning Objectives

• Describe the organization and components of the cell membrane as a fluid mosaic model.
• Explain the functions of phospholipids, proteins, cholesterol, and carbohydrates in the membrane.
• Understand how the membrane's structure contributes to its selective permeability and cellular communication.+ Show more

Learning Objectives

• Explain how energy captured by producers flows through food chains and webs to consumers and decomposers.
• Describe how matter is recycled in ecosystems through decomposition and nutrient return.
• Distinguish between energy transfer (with energy loss as heat) and matter cycling (with elements reused).

Learning Objectives

• Describe the composition of the cell membrane as a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates.
• Explain the fluid mosaic model of cell membrane organization.
• Identify the functions of membrane proteins, cholesterol, and carbohydrate chains.+ Show more

Learning Objectives

• Describe the role of microscopy in analyzing cellular structures.
• Differentiate between unicellular and multicellular organisms.
• Identify key features of plant and animal cells based on microscopy observations.+ Show more

Learning Objectives

• Describe the structure of the cell membrane as a phospholipid bilayer.
• Identify the roles of embedded proteins, cholesterol, and carbohydrates in the cell membrane.
• Explain how the fluid mosaic model contributes to the membrane's functions.+ Show more

Learning Objectives

• Identify major human activities that alter ecosystems, such as habitat fragmentation and pollution.
• Explain how invasive species and pollution affect biodiversity and ecosystem resilience.
• Describe mitigation and restoration strategies for ecosystems impacted by human activities.+ Show more

Learning Objectives

• Describe how heritable variation and environmental pressures influence natural selection.
• Explain how differential survival and reproduction lead to adaptation over generations.
• Identify examples of natural selection, such as antibiotic resistance and beak size variation.+ Show more

Learning Objectives

• Identify the components of the cell membrane.
• Understand the functions of phospholipids, proteins, cholesterol, and carbohydrates in the membrane.
• Explain how the fluid mosaic model maintains cellular homeostasis.

Learning Objectives

• Explain states of matter using a particle model and describe phase changes between states.
• Relate temperature and pressure to when phase changes occur and to measurable properties such as density and viscosity.
• Use water as an example to connect molecular energy to observable behavior, including how boiling point changes with atmospheric pressure.

Learning Objectives

• Understand how microscopy reveals the cellular structure of organisms.
• Differentiate between unicellular and multicellular organization.
• Identify key features such as cell boundaries, plasma membranes, and cell walls.+ Show more

Learning Objectives

• Explain factors affecting solubility such as temperature, pressure, and solvent polarity.
• Interpret solubility curves and understand saturation and supersaturation concepts.
• Predict outcomes of recrystallization and separation processes based on solubility principles.+ Show more

Learning Objectives

• Identify observable indicators that a chemical reaction has occurred.
• Explain how gas production, precipitate formation, color change, and temperature change serve as evidence of new substances.
• Distinguish chemical changes from reversible physical changes using conservation of mass in sealed systems.

Learning Objectives

• Explain how matter and energy move through ecosystems in connected ways (producers, consumers, decomposers).
• Describe how food chains and food webs transfer energy across trophic levels.
• Predict why only a fraction of energy reaches higher trophic levels due to energy loss as heat.

Learning Objectives

• Observe plant epidermis cells under a microscope.
• Identify cell boundaries such as plasma membranes and cell walls.
• Differentiate between unicellular and multicellular organisms.+ Show more

Learning Objectives

• Understand what gravity is and how it affects objects.
• Identify the relationship between mass, force, and acceleration.
• Describe the role of support forces like normal force.+ Show more

Learning Objectives

• Describe how the phospholipid bilayer forms a barrier that affects what can pass through a cell membrane.
• Explain how embedded proteins help with transport, signaling, and receptor functions.
• Connect carbohydrate chains to cell recognition and adhesion.

Learning Objectives

• Explain how temperature and solvent polarity affect dissolution and solubility
• Use solubility curve ideas to predict whether a solution is unsaturated, saturated, or supersaturated
• Describe how pressure affects the solubility of gases and apply this to real-world situations+ Show more

Learning Objectives

• Understand how forces have both magnitude and direction and how they combine to form a net force.
• Explain how unbalanced forces change an object's velocity by altering speed and/or direction.
• Differentiate between balanced and unbalanced forces and their effects on objects.+ Show more

Learning Objectives

• Explain how melting point, boiling point, conductivity, refractive index, and gravimetric residue can indicate purity or contamination.
• Use “multiple lines of evidence” to justify whether a sample is likely pure.
• Compare how different tests respond to different kinds of impurities and describe trade-offs.

Learning Objectives

• Distinguish weather from climate and explain how climate is influenced by long-term drivers.
• Describe how solar energy, atmospheric circulation, and the distribution of water shape regional climate.
• Explain how ocean processes affect heat storage and heat release and how that can shift precipitation patterns over time.

Learning Objectives

• Explain how temperature, solvent polarity, and pressure affect dissolution and solubility.
• Use solubility curves to identify unsaturated, saturated, and supersaturated conditions.
• Predict how concentration changes and how recrystallization can improve recovery and purity.

Learning Objectives

• Understand the concept of solubility and what it indicates about a substance.
• Identify common examples of solubility in everyday life.
• Explain how temperature, solvent polarity, and pressure influence solubility.+ Show more

Learning Objectives

• Describe the organization and components of the cell membrane.
• Explain the functions of lipids, proteins, and carbohydrates in the membrane.
• Understand how the membrane maintains selective permeability.+ Show more

Learning Objectives

• Understand the factors affecting solubility such as temperature, solvent polarity, and pressure.
• Interpret solubility curves and concepts of saturation and supersaturation.
• Analyze examples of solubility in real-world applications like salt water and soft drinks.+ Show more

Learning Objectives

• Explain the factors that influence solubility, including temperature, pressure, and solvent polarity.
• Interpret and analyze solubility curves and concepts of saturation and supersaturation.
• Describe how solubility affects separation methods, concentration calculations, and recrystallization outcomes.+ Show more

Learning Objectives

• Explain how gravity produces weight and affects the motion of objects near Earth
• Relate gravitational force and acceleration using the role of mass and inertia
• Describe how support forces (normal forces) balance weight when objects are at rest

Learning Objectives

• Identify observable indicators that a chemical reaction has occurred, such as gas production, precipitate formation, color change, and temperature change.
• Explain irreversibility in chemical reactions and relate it to composition changes.
• Describe examples of chemical reactions, including rusting, combustion, and neutralization, and discuss how mass measurements in sealed systems demonstrate conservation principles.+ Show more

Learning Objectives

• Identify observable indicators that show a chemical reaction has occurred, such as gas production, precipitate formation, color change, and temperature change.
• Explain why mass measurements in sealed systems support the conservation of mass during chemical reactions.
• Distinguish chemical changes from physical changes by linking evidence to changes in composition and reversibility.

Learning Objectives

• Differentiate weather and climate using time scales and typical patterns.
• Explain how solar energy, atmospheric circulation, and water distribution shape climate.
• Describe how ocean heat storage and release can influence regional climate patterns.

Learning Objectives

• Define weather and climate and explain their differences.
• Identify key factors that influence Earth's climate system.
• Understand how ocean processes affect regional climate patterns.+ Show more

Learning Objectives

• Identify examples of physical changes
• Differentiate between physical and chemical changes
• Observe indicators of chemical reactions+ Show more

Learning Objectives

• Identify major human-induced environmental changes such as habitat fragmentation, pollution, and invasive species.
• Explain the effects of human impacts on biodiversity, ecosystem services, and trophic structures.
• Describe approaches to mitigate and restore ecosystems affected by human activities.

Learning Objectives

• Understand how microscopy reveals cellular structures in plant and animal tissues.
• Identify differences between unicellular and multicellular organisms based on microscopic evidence.
• Compare cellular features such as cell boundaries, plasma membranes, and cell walls in different organisms.+ Show more

Learning Objectives

• Explain how heritable variation and environmental pressures can change trait frequencies in a population over generations
• Describe how differential survival and reproduction lead to adaptation
• Use examples such as antibiotic resistance or island finch beak size to connect traits, selection, and evolution

Learning Objectives

• Identify observations that provide evidence of chemical reactions
• Explain how new substances form during chemical reactions
• Describe conservation of matter using sealed-system mass measurements+ Show more

Learning Objectives

• Describe the basic organization of the cell membrane as a fluid mosaic model.
• Identify the functions of phospholipids, proteins, cholesterol, and carbohydrates in the membrane.
• Explain how the structure of the cell membrane regulates transport and communication.+ Show more

Learning Objectives

• Identify how melting point, boiling point, conductivity, refractive index, and gravimetric residue can indicate impurities in a sample.
• Explain why different purity tests may give different results and how using multiple lines of evidence improves confidence.
• Apply purity concepts to evaluate whether a suspected substance is likely pure or contaminated.

Learning Objectives

• Identify observable indicators that a chemical reaction has occurred, such as gas production, precipitate formation, color change, and temperature change.
• Explain why chemical reactions are often irreversible in composition, using evidence from reaction outcomes.
• Use mass measurements and the conservation of mass to distinguish chemical changes from physical changes.

Learning Objectives

• Define the different states of matter as distinct particle arrangements and energy levels.
• Identify and explain phase changes such as melting, freezing, vaporization, condensation, and sublimation.
• Understand how temperature and pressure influence phase transition points.+ Show more

Learning Objectives

• Understand how microscopy reveals basic cellular structures in plants and animals.
• Identify differences between unicellular and multicellular organisms using examples.
• Describe key cellular features such as cell boundaries, plasma membranes, and cell walls.+ Show more

Learning Objectives

• Explain how biodiversity contributes to ecosystem stability
• Describe how overlapping ecological roles can buffer ecosystems against disturbances
• Identify ways habitat loss and invasive species can reduce biodiversity and increase vulnerability+ Show more

Learning Objectives

• Explain how temperature and solvent polarity affect how much solute dissolves in a solvent.
• Use solubility curves and saturation concepts to predict whether a solution will be unsaturated, saturated, or supersaturated.
• Describe how gas solubility changes with pressure and how that relates to everyday situations.+ Show more

Learning Objectives

• Understand the differences between physical changes and chemical changes in matter
• Identify examples of physical changes in everyday life
• Recognize indicators of chemical changes such as color change, gas production, precipitates, and temperature change

Learning Objectives

• Differentiate physical changes from chemical changes based on observable evidence.
• Identify indicators of chemical change such as color change, gas production, precipitate formation, and temperature change.
• Apply particle and matter concepts to predict whether a process is likely physical or chemical.

Learning Objectives

• Identify independent, dependent, and controlled variables in a science investigation
• Explain why controlled variables make comparisons fair
• Use tables and graphs to connect changes in the dependent variable to the independent variable

Learning Objectives

• Understand how fossils provide evidence of ancient life and evolutionary patterns.
• Identify key features of fossil records, including transitional forms and stratigraphy.
• Analyze how fossils help infer common ancestry and macroevolutionary trends.