Grade 9 Science Worksheets

Learning Objectives

• Describe the major stages of glycolysis and where they occur in the cell.
• Explain how glycolysis produces ATP and NADH, including the difference between investment and payoff.
• Compare what happens to pyruvate under aerobic versus anaerobic conditions.+ Show more

Learning Objectives

• Define work in terms of force and displacement and understand its relation to energy transfer.
• Differentiate between positive and negative work and their effects on an object's energy.
• Explain how work relates to real-world scenarios like lifting, pushing, and compression.+ Show more

Learning Objectives

• Understand how multiple bodies and forces interact within complex mechanical systems.
• Apply Newton's laws, net force analysis, and energy accounting to predict system motion.
• Identify energy transfer, energy loss, and dominant forces during system events like collisions.+ Show more

Learning Objectives

• Explain the difference between constraints and criteria in engineering design decisions.
• Identify trade-offs among cost, time, materials, safety, and reliability.
• Use criteria weighting and constraint limits to justify a design choice.

Learning Objectives

• Understand the concept of homeostasis and its importance in maintaining internal body conditions.
• Identify the role of sensors, integrating centers, and effectors in feedback mechanisms.
• Describe how various body systems contribute to homeostasis, including respiratory, circulatory, endocrine, renal, and nervous systems.

Learning Objectives

• Explain how frequency, wavelength, and amplitude describe different aspects of a wave
• Use the relationship between wave speed, frequency, and wavelength to interpret changes in wave patterns
• Interpret how amplitude affects the strength and energy associated with a wave signal+ Show more

Learning Objectives

• Explain how eccentricity, axial tilt, and precession change seasonal insolation patterns.
• Describe how tidal forcing from the Moon and Sun arises from gravitational gradients and relative geometry.
• Connect orbital and tidal interactions to observable consequences such as day length, tidal range, and long-term climate variability.

Learning Objectives

• Understand the different types of intermolecular forces and how they affect physical properties.
• Identify the factors that influence the strength of intermolecular forces in molecules.
• Relate molecular structure to properties such as boiling point, viscosity, and surface tension.+ Show more

Learning Objectives

• Describe the roles of innate and adaptive immune responses in maintaining homeostasis.
• Explain how immune cells communicate with other systems like endocrine and circulatory pathways.
• Identify key components and functions of the immune system in defense and tissue repair.+ Show more

Learning Objectives

• Apply patterns of chemical behavior to predict reaction products.
• Use conservation principles to determine likely outcomes of reactions.
• Identify common reaction types and their typical products.+ Show more

Learning Objectives

• Understand the concept of physical changes and how they differ from chemical changes.
• Identify examples of physical changes in everyday life and natural environments.
• Explain the reversibility of physical changes and their significance in scientific and practical contexts.+ Show more

Learning Objectives

• Understand the different types of microscopes and their functions.
• Identify how models help interpret microscopic structures.
• Explain the importance of scale and spatial relationships in cellular observations.+ Show more

Learning Objectives

• Explain conservation of atoms using particle-level rearrangement during chemical reactions.
• Connect conservation of mass in a closed system to evidence from reactants and products.
• Use balanced accounting (atoms and mass) to predict which product quantities are possible.

Learning Objectives

• Understand the basic principles of molecular geometry and electron pair repulsion.
• Identify common molecular shapes such as linear, trigonal planar, tetrahedral, and bent.
• Explain how molecular shape influences polarity and physical properties.+ Show more

Learning Objectives

• Understand the purpose and components of free body diagrams.
• Learn to sketch vectors representing forces acting on an object.
• Calculate net force by vector addition of forces in free body diagrams.+ Show more

Learning Objectives

• Describe the structure of the plasma membrane and its components.
• Differentiate between passive and active transport mechanisms.
• Explain how membrane proteins facilitate specific transport and communication.+ Show more

Learning Objectives

• Explain how subduction zones form and their key features.
• Identify the geological processes associated with subduction zones, including earthquakes and volcanism.
• Describe how variations in subduction parameters influence seismic hazards and topography.+ Show more

Learning Objectives

• Explain how impulse relates force, contact duration, and change in momentum during collisions.
• Differentiate between elastic and inelastic collisions based on energy transformations.
• Analyze force-time profiles in collision scenarios to understand impulse effects.+ Show more

Learning Objectives

• Understand how individual electrical components exhibit characteristic behaviors such as resistance, diode conduction, and temperature dependence.
• Identify real-world examples of component behaviors like filament heating, thermistor sensors, and resistor networks.
• Describe how component curves, power ratings, and operating limits influence circuit stability and longevity.+ Show more

Learning Objectives

• Describe the roles of insulin and glucagon in blood glucose regulation.
• Explain how hormonal feedback loops maintain metabolic homeostasis during fasting and feeding.
• Identify tissues involved in glucose uptake and release during hormonal control.+ Show more

Learning Objectives

• Understand the alignment of the Sun, Earth, and Moon during solar and lunar eclipses.
• Identify the conditions necessary for each type of eclipse.
• Explain how orbital inclinations affect eclipse frequency and paths of totality.+ Show more

Learning Objectives

• Understand how allele frequencies and trait distributions change in populations over time.
• Explain the role of genetic variation, mutations, and natural selection in evolution.
• Connect individual genetic differences to broader evolutionary patterns and trait shifts.+ Show more

Learning Objectives

• Understand the processes of kidney osmoregulation, including filtration, reabsorption, secretion, and concentration.
• Identify the roles of hormones such as antidiuretic hormone and aldosterone in regulating water and ion balance.
• Explain how renal, cardiovascular, and endocrine systems coordinate to maintain homeostasis of blood volume, osmolarity, and electrolyte composition.

Learning Objectives

• Understand the mechanisms involved in thermoregulation and homeostasis.
• Identify responses such as sweating, shivering, and blood flow changes that regulate internal temperature.
• Describe how the hypothalamus detects and orchestrates temperature responses.+ Show more

Learning Objectives

• Explain how prototypes provide evidence to test whether a design meets success criteria.
• Use data from prototype tests to determine if a solution needs refinement or redesign.
• Match evidence to specific criteria (e.g., accuracy, strength under load, temperature change, contaminant reduction).+ Show more

Learning Objectives

• Explain how waves transfer energy and, in many cases, information without transporting matter overall
• Describe the relationships between frequency, wavelength, amplitude, and observable wave behavior
• Use wave property definitions to interpret wave effects in real-world contexts such as sound, sensors, and communication

Learning Objectives

• Differentiate climate from short-term weather and explain why climate varies by region
• Describe how latitude, distance from water, elevation, and atmospheric circulation influence temperature and precipitation ranges
• Analyze how climate shapes ecosystems and surface processes over time+ Show more

Learning Objectives

• Explain how limiting factors affect population growth and carrying capacity
• Differentiate biotic and abiotic limiting factors in an ecosystem
• Analyze how limiting factors influence species interactions and biodiversity+ Show more

Learning Objectives

• Explain how chemical reactions transform reactants into products by breaking and forming chemical bonds
• Use chemical formulas, state symbols, and stoichiometric coefficients to represent reactions accurately
• Interpret symbolic reaction descriptions, including relative amounts and energy changes

Learning Objectives

• Describe the biological organization hierarchy from molecules to organisms
• Explain emergent properties and why higher levels can function differently than lower levels
• Use examples to connect tissue coordination, organ function, and whole-organism outcomes

Learning Objectives

• Explain how tectonic plate motion relates to earthquakes, volcanoes, and mountain building
• Identify major types of plate boundaries and predict typical Earth-surface outcomes
• Use plate-motion ideas to interpret patterns of seismic activity across regions

Learning Objectives

• Explain how VSEPR theory uses electron pair repulsion to predict molecular geometry
• Identify common molecular shapes (linear, trigonal planar, tetrahedral, and bent) from electron regions
• Describe how molecular shape affects polarity and related macroscopic properties such as boiling point and solubility

Learning Objectives

• Explain how a device can be modeled as a system with interacting parts.
• Map a device’s inputs, outputs, energy transfers, and material flow using systems thinking.
• Identify constraints and criteria (such as compatibility) that affect reliability and performance.+ Show more

Learning Objectives

• Explain how engineering design translates scientific understanding into performance requirements for real societal needs.
• Analyze how engineering choices can affect access, reliability, and safety for different communities.
• Use evidence-based reasoning to evaluate trade-offs and long-term usability in engineering solutions.

Learning Objectives

• Explain how Earth’s axial tilt and orbital motion influence seasons and long-term changes in sunlight received.
• Describe how the Moon’s synodic cycle produces predictable lunar phases.
• Connect gravitational interactions among Earth, Sun, and Moon to patterns in tides.+ Show more

Learning Objectives

• Explain what electron configuration shows about the distribution of electrons in energy levels and orbitals
• Use valence electrons to predict common ion charges and typical bonding patterns
• Describe how shell filling order relates to periodic trends in atomic size and ionization energy+ Show more

Learning Objectives

• Identify diagnostic physical and chemical properties of common rock-forming minerals
• Explain how crystal structure and atomic bonding relate to hardness, cleavage, lustre, streak, and specific gravity
• Connect mineral composition to formation environments and predict stability under changing temperature and pressure+ Show more

Learning Objectives

• Identify reactants and products in a chemical equation and interpret chemical formulas using subscripts
• Explain why chemical equations must be balanced to reflect conservation of atoms and mass
• Use coefficients to represent relative quantities of reactants and products in a reaction+ Show more

Learning Objectives

• Explain how body systems coordinate to maintain homeostasis through feedback, set points, and physiological regulation
• Describe coupling between circulation and respiration and how it supports oxygen delivery and carbon dioxide removal
• Analyze how renal regulation of blood volume and neural modulation of cardiac output influence internal stability during changing conditions+ Show more

Learning Objectives

• Identify the correct forces acting on an isolated object and represent them on a free-body diagram using standard vector conventions.
• Choose an appropriate coordinate system and determine the component form needed to compute net force.
• Analyze conditions for equilibrium (net force equals zero) and for acceleration using Newton’s second law.

Learning Objectives

• Define mechanical work as the scalar product of force and displacement and explain when work is zero
• Describe different forms of energy (kinetic and potential) and how energy changes during motion
• Use units and relationships to calculate work and connect work to changes in energy+ Show more

Learning Objectives

• Explain how lifestyle and environmental factors can affect human health at cellular and system levels
• Interpret epidemiological correlations using supporting physiological mechanisms to evaluate possible causation
• Describe key mechanisms such as oxidative stress, chronic inflammation, altered membrane transport, and disrupted hormonal signaling+ Show more

Learning Objectives

• Identify Newton’s third-law action–reaction force pairs acting on different objects
• Explain that forces in a third-law pair have equal magnitude and opposite direction but act on different bodies
• Choose an appropriate system boundary to distinguish internal vs. external forces in multi-object interactions+ Show more

Learning Objectives

• Describe how glycolysis, the citric acid cycle, and oxidative phosphorylation work together to produce ATP
• Explain how mitochondrial structure supports a proton gradient and ATP synthase activity
• Compare aerobic and anaerobic pathways and relate them to tissue energy demands+ Show more

Learning Objectives

• Explain Newton’s third law using force pairs acting on different objects.
• Identify action–reaction forces in real scenarios such as recoil and collisions.
• Connect paired forces to changes in momentum for each object.

Learning Objectives

• Explain how gravity provides the centripetal force needed for curved orbital motion.
• Describe how orbital speed and distance from a star change during a planet’s revolution.
• Use observed patterns in the sky to connect recurring positions to orbital periods.

Learning Objectives

• Explain how light can be modeled as a wave and as a particle, depending on the phenomenon.
• Use the photoelectric effect concept to connect light frequency with electron emission.
• Interpret and apply wave ideas such as interference, diffraction, and polarization to real observations.+ Show more

Learning Objectives

• Differentiate weather from climate and explain why climate requires long-term observations.
• Describe how Earth’s energy balance and atmospheric composition affect temperature over time.
• Use examples of natural records (ice cores, ocean sediments) to explain how scientists build climate evidence.+ Show more