Grade 9 Science Worksheets

Learning Objectives

• Identify the basic components of DNA and RNA
• Understand the structural differences between DNA and RNA
• Explain how nucleic acid structures relate to their functions in heredity and cellular processes

Learning Objectives

• Explain how hydrophilic and hydrophobic parts of phospholipids form a bilayer
• Describe how membrane structure supports selective permeability
• Identify how the bilayer acts as a barrier to some substances and allows others to pass

Learning Objectives

• Explain how the nephron forms urine through glomerular filtration, selective reabsorption, secretion, and urine concentration
• Describe how hydrostatic and oncotic pressures influence the glomerular filtration rate
• Use countercurrent multiplication and ADH to predict how urine concentration changes+ Show more

Learning Objectives

• Explain how alleles form genotypes and how genotypes determine observable traits (phenotypes).
• Use dominant and recessive relationships to predict which traits appear in offspring.
• Interpret heredity evidence across generations using genotype–phenotype reasoning.

Learning Objectives

• Identify series and parallel components within a mixed (combined) circuit
• Calculate equivalent resistance and use it to find total current and voltage relationships
• Trace how current and voltage distribute across parallel branches in combined circuits+ Show more

Learning Objectives

• Understand the structure of the plasma membrane.
• Explain how molecules move across the membrane through passive and active transport.
• Identify different proteins involved in membrane transport and their functions.

Learning Objectives

• Identify different types of epithelial tissues
• Understand the functions of epithelial tissues in the body
• Recognize example structures of epithelial tissue in organs+ Show more

Learning Objectives

• Draw a correct free body diagram by identifying all external forces acting on a single object
• Resolve forces into components and determine the net force and direction of acceleration
• Use Newton’s second law (net force = mass × acceleration) to predict motion qualitatively and quantitatively

Learning Objectives

• Understand what coefficients in balanced chemical equations represent
• Interpret ratios of coefficients to determine relative amounts of reactants and products
• Relate symbolic coefficients to real-world mass relationships in chemical reactions+ Show more

Learning Objectives

• Define physical properties and understand their importance
• Identify common physical properties such as density, melting point, boiling point, colour, hardness, and conductivity
• Differentiate between intensive and extensive properties+ Show more

Learning Objectives

• Understand how sunlight interacts with Earth's surface
• Identify the different ways energy is transferred within Earth systems
• Explain the importance of energy balance in maintaining Earth's temperature+ Show more

Learning Objectives

• Explain how nuclear fusion in stars can create new elements over a star’s lifetime.
• Describe how explosive events in space spread matter that later forms new stars, planets, and atmospheres.
• Connect stellar life cycles to the elements found on Earth and the timing of chemical enrichment in the universe.

Learning Objectives

• Explain what uncertainty shows on graphs and why it matters for interpreting trends
• Use overlap (or non-overlap) of uncertainty ranges to judge whether differences are likely meaningful
• Select appropriate ways to represent uncertainty, such as error bars or uncertainty bands

Learning Objectives

• Explain how predation, competition, and mutualism affect population sizes and community structure.
• Connect environmental factors (water, temperature, nutrients) to survival and growth in ecosystems.
• Interpret interaction networks to predict how changes in one population can cascade through others.+ Show more

Learning Objectives

• Explain the steps of a design cycle and how feedback leads to design improvement.
• Identify requirements and constraints in an engineering problem and connect them to evaluation criteria.
• Use evidence from testing to refine a solution and justify changes in a design.

Learning Objectives

• Explain how DNA, RNA, and protein sequence comparisons can reveal evolutionary relationships.
• Describe how molecular clocks use sequence divergence rates to estimate divergence times.
• Evaluate how comparative genomics and gene duplication patterns complement fossil and morphological evidence.

Learning Objectives

• Understand how the body maintains internal temperature through various mechanisms
• Identify functions of skin blood flow, sweating, shivering, and metabolic adjustments
• Describe the role of the hypothalamus in thermoregulation+ Show more

Learning Objectives

• Understand the definition of power as the rate of energy transfer or work per unit time.
• Learn how to measure average and instantaneous power in mechanical contexts.
• Understand what mechanical efficiency is and how it reflects useful energy output relative to input.+ Show more

Learning Objectives

• Explain how magnification, resolution, and contrast affect how microscope images appear.
• Compare how light microscopes and electron microscopes form magnified images.
• Interpret microscope images by using scale bars and recognizing how specimen preparation affects results.

Learning Objectives

• Differentiate heat transfer from work transfer as two distinct pathways for energy movement.
• Explain how energy changes in a system can be described as coming from or going to surroundings through heat and/or work.
• Apply heat and work ideas to physical and chemical changes using correct scientific reasoning.

Learning Objectives

• Explain how body systems interact to maintain homeostasis during normal activity and acute stress.
• Describe circulation–respiration coupling and how neural and endocrine signals coordinate cardiac output.
• Use feedback mechanisms, set points, and examples (thermoregulation and acid–base balance) to predict system responses.

Learning Objectives

• Explain how biodiversity supports ecosystem stability and resilience
• Describe how environmental changes can alter population sizes and species interactions
• Analyze how human activities can increase or reduce biodiversity and affect ecosystem functions

Learning Objectives

• Define electric current, voltage, and resistance.
• Explain the role of these quantities in electrical systems.
• Identify units and symbols used to measure electrical quantities.+ Show more

Learning Objectives

• Explain Newton’s third law by identifying action-reaction force pairs between two interacting objects
• Describe how equal and opposite forces act on different objects and do not cancel within one object
• Use the action-reaction idea to predict motion changes in real-world scenarios such as recoiling cannons and collisions

Learning Objectives

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

Learning Objectives

• Explain how relative positions of the Sun, Moon, and Earth determine Moon phases.
• Describe why eclipses require specific alignment and do not occur every month.
• Use viewing geometry and orbital tilt to predict when eclipses are more likely.

Learning Objectives

• Explain how phylogenetic trees represent hypothesized evolutionary relationships using branching patterns and common ancestors.
• Differentiate monophyletic, paraphyletic, and polyphyletic groups and predict what each implies about sampling.
• Interpret rooted vs. unrooted trees and describe how characters (including synapomorphies) help determine tree topology.

Learning Objectives

• Explain how reaction conditions (temperature, pressure, concentration, and catalysts) can change reaction rates and product outcomes.
• Connect equilibrium and kinetics to predict how a chemical system can be refined for a desired product.
• Use basic reasoning about selectivity, yield, and side reactions to design reaction conditions in closed systems.

Learning Objectives

• Understand how gene expression influences physical traits during development
• Identify roles of regulatory networks and epigenetic mechanisms
• Link gene regulation to phenotypic diversity and evolutionary patterns+ Show more

Learning Objectives

• Understand the concept of allele frequency and genetic variation
• Learn about Hardy-Weinberg equilibrium assumptions
• Explore genetic drift, bottlenecks, and founder effects+ Show more

Learning Objectives

• Explain how conservation of matter is used to interpret chemical reactions.
• Balance simple chemical equations by matching the number of atoms of each element on both sides.
• Interpret reaction coefficients as particle ratios and justify when coefficients need to change.

Learning Objectives

• Understand how wind energy contributes to renewable power sources.
• Identify concepts related to grid balancing with intermittent energy sources.
• Explain the environmental and economic impacts of renewable energy integration.

Learning Objectives

• Identify major organelles of eukaryotic cells
• Understand the functions of different cell structures
• Relate cell structure features to their specific functions+ Show more

Learning Objectives

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

Learning Objectives

• Characterize physical changes as alterations in state or form that do not change chemical identity.
• Distinguish reversible and irreversible physical transformations using everyday examples.
• Explain how energy transfer accompanies phase changes and how it relates to observable macroscopic changes.+ Show more

Learning Objectives

• Define evolution and explain how allele frequencies can change over generations
• Identify and compare the mechanisms of natural selection and genetic drift
• Describe how mutation and gene flow contribute to genetic variation and evolutionary change

Learning Objectives

• Explain how net force, mass, and acceleration are related using Newton’s second law
• Distinguish inertial mass from gravitational effects (weight) in real situations
• Use proportional reasoning to predict how acceleration changes when mass changes for the same net force

Learning Objectives

• Define net force and explain its significance in motion.
• Identify forces acting on an object and determine their vector sum.
• Understand how balanced and unbalanced forces affect motion.+ Show more

Learning Objectives

• Understand the basic principles of population genetics.
• Explain allele frequency and its significance.
• Describe Hardy-Weinberg equilibrium assumptions.+ Show more

Learning Objectives

• Understand how phase changes involve energy transfer and particle motion.
• Identify different phase changes such as melting, vaporization, sublimation, and condensation.
• Explain how latent heat relates to energy transfer during phase transitions.+ Show more

Learning Objectives

• Explain how cell membranes regulate transport to support homeostasis
• Describe how cellular energy use powers chemical reactions needed for growth and maintenance
• Use evidence (uptake rates and growth patterns) to connect cellular structure to function+ Show more

Learning Objectives

• Differentiate elements, compounds, and mixtures using macroscopic observations and compositional criteria
• Define pure substances as having fixed composition and mixtures as having variable composition
• Interpret and use symbols and formulas to represent elements and compounds (e.g., O, NaCl)+ Show more

Learning Objectives

• Explain how atomic structure (especially outer electron arrangement) creates repeating patterns on the periodic table.
• Use periodic table groups and periods to predict trends in reactivity and typical ion charge.
• Justify how similar electron configurations lead to similar chemical behavior across a group.

Learning Objectives

• Identify basic molecular shapes based on descriptions
• Understand the principles of VSEPR theory
• Relate molecular shapes to properties like polarity and reactivity+ Show more

Learning Objectives

• Identify observable markers of chemical change, including color shifts, gas evolution, precipitate formation, temperature change, and irreversibility under ordinary conditions.
• Explain how these markers help distinguish chemical change from physical change in everyday and industrial contexts.
• Use evidence-based reasoning to predict whether a process likely involves chemical change.

Learning Objectives

• Interpret genotype and phenotype frequencies to infer likely inheritance patterns.
• Connect molecular evidence (PCR markers, single nucleotide variants, sequencing reads) to genotype identification.
• Use expected genetic ratios and family information to evaluate inheritance, linkage, heterozygosity, and selection.+ Show more

Learning Objectives

• Describe the processes involved in the rock cycle, including melting, crystallization, erosion, and metamorphism.
• Identify examples of rock transformations, such as basalt formation, sandstone deposition, and schist metamorphism.
• Explain how rates, pressure-temperature conditions, and radiometric ages influence the sequencing of rock cycle events.+ Show more

Learning Objectives

• Explain how the hypothalamus links neural signals to hormonal control via releasing factors
• Describe the roles of the portal blood system and fenestrated capillaries in neuroendocrine regulation
• Identify how feedback helps coordinate hormone levels affecting metabolism, growth, reproduction, and stress responses