Grade 9 Worksheets

Learning Objectives

• Define genetic drift and explain its role in evolution.
• Identify the effects of genetic drift in small populations.
• Differentiate between genetic drift and natural selection.+ Show more

Learning Objectives

• Explain how wind and solar variability affects grid operation and dispatch planning.
• Describe how energy storage and grid balancing help maintain reliable electricity supply.
• Evaluate the environmental and economic trade-offs of integrating renewables in a regional grid.

Learning Objectives

• Identify direct and indirect characterization in a narrative.
• Explain how dialogue and actions reveal a character’s motivations.
• Analyze cause-and-effect connections between events and character growth or change.+ Show more

Learning Objectives

• Define ecosystem services and identify their main types.
• Explain the importance of biodiversity in delivering ecosystem services.
• Describe how human activities impact ecosystem functions and services.+ Show more

Learning Objectives

• Compare physical and chemical changes using ideas of energy transfer and system–surroundings interactions.
• Explain how endothermic and exothermic processes relate to observed temperature changes.
• Connect energy transfer to particle behavior in phase changes and to bond rearrangements in chemical changes.

Learning Objectives

• Explain how light energy is converted into chemical energy during the light reactions of photosynthesis.
• Describe the roles of thylakoid membranes, photosystems, and electron carriers in photochemistry.
• Relate electron flow to proton gradient formation and ATP synthase activity.+ Show more

Learning Objectives

• Describe how atomic number relates to an element's position on the periodic table.
• Explain the significance of periodic trends such as reactivity, ion charge, and bonding tendencies.
• Identify patterns in element properties across periods and groups.+ Show more

Learning Objectives

• Understand the basic concepts of Mendelian inheritance, including dominant and recessive alleles.
• Interpret Punnett squares to predict genotype and phenotype ratios in monohybrid and dihybrid crosses.
• Analyze pedigree charts to determine inheritance patterns.+ Show more

Learning Objectives

• Explain how electrical systems lose energy through resistive losses and other mechanisms.
• Describe how power factor and proper device selection affect system efficiency.
• Compare design choices that reduce wasted energy, cost, and environmental impact.

Learning Objectives

• Explain how an electric motor converts electrical energy into mechanical work using electromagnetic effects.
• Describe how a generator produces electrical energy through electromagnetic induction.
• Match motor and generator performance characteristics to real-world load needs in local systems.

Learning Objectives

• Use quantifiable indicators (such as extraction rates, groundwater levels, and land-use change) to describe human impacts on Earth systems.
• Interpret resource trends by comparing datasets and identifying possible system thresholds and natural variability.
• Evaluate consequences of resource extraction, including subsidence, soil erosion, and altered sediment budgets, using evidence.

Learning Objectives

• Explain the difference between kinetic energy and potential energy using real-world examples.
• Relate kinetic energy to speed and potential (gravitational) energy to height above a reference level.
• Describe how energy transfers between kinetic and potential during motion such as a roller coaster ride.+ Show more

Learning Objectives

• Understand the hierarchical organization from cells to organism systems.
• Describe how tissues, organs, and organ systems interact for physiological functions.
• Explain the specialization of tissues and organs in maintaining organism health.+ Show more

Learning Objectives

• Explain how climate variability can change weather patterns over months to years.
• Describe how ocean-atmosphere interactions such as El Niño and La Niña redistribute heat and moisture.
• Distinguish short-term natural variability from longer-term climate trends using evidence across timescales.

Learning Objectives

• Explain how pulmonary ventilation and gas exchange support oxygen delivery to cells
• Describe how the cardiovascular system transports gases and helps regulate blood pH
• Evaluate how chemoreceptor feedback coordinates breathing and circulation during changing metabolic demand

Learning Objectives

• Identify the main idea and key supporting details about biological classification.
• Explain how classification helps scientists communicate about living organisms.

Learning Objectives

• Calculate the center of mass for composite rigid-body systems using weighted averages.
• Apply moment and net torque conditions to determine static rotational equilibrium.
• Analyze tipping and rotational stability using support bases and critical tipping thresholds.

Learning Objectives

• Explain how water cycles through interconnected Earth reservoirs using evaporation, condensation, precipitation, and runoff.
• Describe how carbon moves among the atmosphere, living things, oceans, and rocks through photosynthesis, respiration, and chemical exchange.
• Connect Earth’s energy balance (solar vs. Earth radiation) to weather and temperature changes.

Learning Objectives

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

Learning Objectives

• Select academic or domain-specific vocabulary that matches the precise meaning needed in a text.
• Revise sentences to use correct word forms and an appropriate level of technicality.
• Distinguish between general and academic terms when summarizing or analyzing a passage.

Learning Objectives

• Understand the concept of biological fitness and its role in survival.
• Explain how natural selection affects populations over time.
• Identify how environmental changes influence the advantage of certain traits.+ Show more

Learning Objectives

• Explain how wind and solar variability affects electrical grid reliability
• Describe dispatch coordination and the role of grid operators when renewable output changes
• Evaluate why energy storage and demand-side measures help balance renewable intermittency+ Show more

Learning Objectives

• Understand the basic mechanisms linking oceanic and atmospheric systems
• Identify phenomena such as ENSO and their impacts on regional climate
• Analyze how sea surface temperature anomalies influence weather patterns+ Show more

Learning Objectives

• Explain how allele frequencies change under Hardy-Weinberg equilibrium assumptions and when those assumptions break down
• Describe how genetic drift, bottlenecks, and founder effects can reduce genetic diversity in small or isolated populations
• Evaluate how gene flow and natural selection interact with stochastic processes to shape evolutionary trajectories

Learning Objectives

• Explain how temperature differences create pressure gradients that drive atmospheric circulation
• Describe how moisture changes (evaporation and condensation) produce clouds and precipitation
• Compare heat transfer processes (radiation, conduction, convection) and their roles in weather systems+ Show more

Learning Objectives

• Understand the key performance metrics used to evaluate wind turbines.
• Analyze and compare different wind turbine designs based on measurable criteria.
• Assess environmental impacts and life-cycle costs of renewable energy systems.+ Show more

Learning Objectives

• Explain how energy flows through trophic levels in ecosystems (producers to consumers) and why energy is lost as heat.
• Describe how trophic levels relate to food webs and energy transfer efficiency.
• Compare linear energy chains with interconnected food webs and predict how changes in one species can affect others.

Learning Objectives

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

Learning Objectives

• Understand the environmental and societal impacts of renewable energy sources
• Evaluate different energy-generation options based on sustainability criteria
• Analyze tradeoffs involved in selecting renewable energy technologies

Learning Objectives

• Explain how meiosis and fertilization lead to offspring inheriting allele combinations from parents
• Describe how genetic variation is generated through recombination and heritable mutations
• Connect chromosome behavior during meiosis to patterns of trait inheritance across generations

Learning Objectives

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

Learning Objectives

• Understand how to interpret scatterplots and identify patterns
• Recognize outliers and trends in graphical data
• Learn the basics of constructing different types of graphs+ Show more

Learning Objectives

• Understand the mechanisms of plate tectonics, including the types of boundaries and their surface expressions.
• Identify the processes of subduction, continental collision, and how they relate to geological features.
• Explain how mantle convection and slab pull drive plate movements.+ Show more

Learning Objectives

• Identify the key parts involved in thermoregulation
• Understand how body systems work together to maintain temperature
• Explain the functions of skin, vasculature, muscles, and the hypothalamus+ Show more

Learning Objectives

• Explain how simple machines transfer forces to change effort, direction, or displacement
• Compare ideal mechanical advantage with real-world outcomes caused by friction and support geometry
• Apply relationships among input force, load, and displacement to common machine examples

Learning Objectives

• Understand the hierarchical levels of biological organization from cells to systems.
• Describe the functions of different tissues, organs, and systems.
• Explain how cell specialization contributes to organ functions.+ Show more

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 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

• 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

• 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 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

• 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

• 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

• 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