Grade 9 Worksheets

Learning Objectives

• Understand the contributions of prominent African-American figures in history and culture.
• Identify key traits such as courage, innovation, and leadership exhibited by these figures.
• Reflect on the lasting impact of their achievements and how they inspired social progress.+ Show more

Learning Objectives

• Identify the main parts of a microscope.
• Understand the basic functions of microscope components.
• Learn how microscopes enhance our view of tiny objects and structures.

Learning Objectives

• Identify basic components of the immune system and their functions
• Understand the difference between innate and adaptive immunity
• Explain how the immune system interacts with other body systems

Learning Objectives

• Understand the composition of organs in the human body, especially the heart.
• Identify the different tissue types that make up organs.
• Explain how tissues work together within an organ to support its function.+ Show more

Learning Objectives

• Explain the concept of work as energy transfer involving force and displacement.
• Identify the factors that influence the amount of work done on an object.
• Differentiate between positive and negative work in various scenarios.+ Show more

Learning Objectives

• Understand the working principles of electric motors and generators.
• Identify different types of motors and their applications.
• Explain electromagnetic induction and its role in power generation.+ Show more

Learning Objectives

• Explain how waves transfer energy (and sometimes information) without transporting matter overall
• Relate frequency, wavelength, and amplitude to observable wave behavior and the energy a wave carries
• Use wave-property relationships to predict how changes in a wave affect its motion and signaling capability

Learning Objectives

• Identify different types of chemical reactions
• Understand the process of chemical transformation and energy exchange
• Recognize examples of reactions in daily life

Learning Objectives

• Identify natural processes that cause shoreline change
• Understand the impact of waves, tides, and storm surges on coastlines
• Analyze sediment transport and shoreline response mechanisms+ Show more

Learning Objectives

• Explain the conservation of mass principle in closed chemical systems using atomic reasoning
• Use mass measurements and particle conservation ideas to interpret chemical reactions (including gas and combustion scenarios)
• Apply conservation of mass to simple material-balance situations relevant to real-world resource processing

Learning Objectives

• Understand the basic structure and types of crystal lattices.
• Identify characteristics of ionic, metallic, and covalent network lattices.
• Describe how atomic arrangements influence macroscopic properties of solids.+ Show more

Learning Objectives

• Understand the causes and effects of earthquakes and related hazards.
• Learn to evaluate hazard risks through data analysis and modeling.
• Explore case studies involving natural hazard impacts on communities.+ Show more

Learning Objectives

• Describe passive and active processes of molecular transport across membranes.
• Explain the role of various transport mechanisms in maintaining cellular homeostasis.
• Identify examples of vesicular transport such as endocytosis and exocytosis.+ Show more

Learning Objectives

• Understand the principles of scaling laws and dimensional similarity.
• Apply proportional reasoning to construct models and interpret data across different scales.
• Analyze how nonlinearity and scale-dependent effects impact extrapolations in scientific contexts.+ Show more

Learning Objectives

• Understand the difference between optical and electron microscopes
• Identify key concepts such as magnification, resolution, and contrast
• Learn how image interpretation depends on scale bars, staining artifacts, and preparation methods+ Show more

Learning Objectives

• Identify key structural differences between prokaryotic and eukaryotic cells
• Describe the functions of various cell components
• Understand how cell structure relates to biological roles and evolution

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 the differences between mean, median, and mode and their appropriate contexts.
• Analyze how skewness, outliers, and multimodality influence the choice of central tendency measure.
• Connect the selection of a central tendency to the underlying distribution or data-generating process.+ Show more

Learning Objectives

• Understand different measures of dispersion such as variance, interquartile range, and range.
• Explain how distribution shape and variability influence confidence in statistical estimates.
• Interpret overlapping distributions and apply effect-size reasoning to compare hypotheses.+ Show more

Learning Objectives

• Understand the mechanisms that lead to the formation of new species
• Identify different models and examples of speciation including allopatric and sympatric speciation
• Recognize the role of hybrid zones, polyploidy, and adaptive radiation in species divergence+ Show more

Learning Objectives

• Understand how DNA replication and chromosomal segregation contribute to inheritance.
• Identify the roles of gametes and zygotes in hereditary information transfer.
• Describe observable phenomena such as karyotype patterns and transmission ratios in pedigrees.+ Show more

Learning Objectives

• Describe the basic principles of Mendelian inheritance, including dominant and recessive allele interactions.
• Explain segregation and independent assortment using Punnett square analysis.
• Interpret pedigrees to determine inheritance patterns.+ Show more

Learning Objectives

• Explain the key mechanisms that generate genetic variation such as point mutations, chromosomal rearrangements, and meiotic recombination.
• Describe how genetic variation affects phenotype and contributes to heritable diversity in populations.
• Analyze how molecular changes influence gene expression and protein function, impacting heritable traits.+ Show more

Learning Objectives

• Describe the process of electron transport chains in mitochondria and chloroplasts.
• Explain how electron flow drives proton pumping and ATP synthesis via chemiosmosis.
• Compare mitochondrial and thylakoid electron transport systems and their roles in energy production.+ Show more

Learning Objectives

• Understand how optical and electron microscopes produce magnified images of specimens.
• Explain the concepts of magnification, resolution, and contrast in microscopy.
• Identify the differences between light and electron microscopes in terms of application and capabilities.+ Show more

Learning Objectives

• Understand the mechanisms of hormonal regulation and feedback loops in the endocrine system.
• Analyze the control of glucose homeostasis involving insulin and glucagon.
• Explore how the thyroid gland regulates metabolic rate through hormone feedback mechanisms.+ Show more

Learning Objectives

• Understand the principles of combining series and parallel circuits.
• Learn methods for simplifying complex electrical networks.
• Identify equivalent resistances in mixed circuit configurations.+ Show more

Learning Objectives

• Explain what uncertainty in a graph represents and why it matters for interpreting data.
• Interpret error bars or uncertainty bands to judge whether differences between conditions are meaningful.
• Use overlap (or lack of overlap) of uncertainty ranges to support or question claims about trends.

Learning Objectives

• Interpret multiple lines of evidence supporting the theory of evolution.
• Describe mechanisms like natural selection, genetic drift, gene flow, and mutation.
• Evaluate scenarios illustrating adaptation, such as antibiotic resistance and environmental change.+ Show more

Learning Objectives

• Analyze hydrologic data to understand water's role in Earth's surface processes.
• Identify examples of landscape change caused by water erosion, transport, and deposition.
• Interpret discharge records, sediment measurements, and watershed maps to assess hydrologic feedbacks.+ Show more

Learning Objectives

• Explain how friction and drag oppose relative motion and affect acceleration
• Identify the direction of friction and drag forces using everyday scenarios and free-body reasoning
• Describe how friction depends on normal force and surface conditions, and how drag depends on speed and shape+ Show more

Learning Objectives

• Understand and describe the key properties of waves, including amplitude, frequency, wavelength, and phase.
• Apply the wave speed formula: wave speed = frequency × wavelength to analyze wave scenarios.
• Explain how sinusoidal functions model wave behavior and describe interference and standing waves.+ Show more

Learning Objectives

• Understand the leadership roles of early U.S. Presidents during foundational moments.
• Identify key contributions and traditions established by Presidents George Washington, John Adams, and Thomas Jefferson.
• Examine vocabulary related to governance, such as 'cabinet', 'precedent', and 'federal' values.+ Show more

Learning Objectives

• Explain the difference between power and energy and compute energy over time using power ratings.
• Analyze system performance using efficiency and accounting for energy losses across a process.
• Compare energy budgets for two generation sources using power, time, and throughput reasoning.

Learning Objectives

• Identify major carbon reservoirs in Earth's system, including atmosphere, biosphere, oceans, and geosphere.
• Understand how fluxes such as photosynthesis, respiration, dissolution, sedimentation, and fossil fuel formation move carbon among reservoirs.
• Recognize the timescales of carbon exchange and how human activities impact natural carbon budgets.+ Show more

Learning Objectives

• Identify different trophic levels within food webs.
• Understand energy transfer and loss across trophic levels.
• Analyze the structure and functioning of ecological pyramids.+ Show more

Learning Objectives

• Understand the importance of problem framing in engineering design
• Identify key constraints such as social, economic, environmental, and safety factors
• Analyze interactions among competing constraints to support feasible solutions+ Show more

Learning Objectives

• Understand the basic components and architecture of power distribution systems.
• Identify the roles of transmission lines, substations, and distribution networks in electricity delivery.
• Analyze the trade-offs in system reliability, capacity, and environmental impact.+ Show more

Learning Objectives

• Explain the concept of inertia and its relation to an object's mass.
• Describe everyday examples that illustrate inertia.
• Analyze how force must overcome inertia to change motion.+ Show more

Learning Objectives

• Identify the different types of tissue in the human body and understand their cellular organization.
• Explain how tissue structure supports the functions within organs and organ systems.
• Describe microscopic features like cell shape, junctions, and extracellular components that determine tissue properties.

Learning Objectives

• Describe magmatic systems, eruptive styles, and volcanic gas emissions with an emphasis on compositional controls and tectonic setting differences.
• Contrast effusive shield volcanism and explosive stratovolcano behavior by linking magma viscosity and volatile content to eruptive energy and depositional products.
• Explain landscape modifications, atmospheric inputs, and long-term climate influences through petrologic indicators, eruption chronologies, and volcanic gas datasets.

Learning Objectives

• Understand the concept of power as the rate of energy transfer.
• Learn how efficiency measures the conversion of input energy to useful work.
• Apply principles of power and efficiency to real-world engineering examples.+ Show more

Learning Objectives

• Explain what causes tidal forces on Earth.
• Identify the roles of the Moon and Sun in generating tides.
• Describe how Earth's rotation affects tidal patterns.+ 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 and apply the conservation of mass in balanced chemical equations.
• Calculate molar relationships, masses, and particle counts in chemical reactions.
• Identify limiting reagents and compute theoretical yields.+ Show more

Learning Objectives

• Explain the relationship between force, mass, and acceleration as described by Newton's second law.
• Analyze free-body diagrams to identify forces acting on objects in motion.
• Apply vector decomposition to determine forces and predict trajectories.+ Show more

Learning Objectives

• Explain the three main components of Milankovitch cycles: eccentricity, axial tilt, and precession.
• Describe how these cycles influence Earth's climate and glacial periods.
• Interpret how geological records support the link between orbital variations and climate change.+ Show more

Learning Objectives

• Understand how compounds are represented by chemical formulas and names.
• Explain the difference between ionic and covalent bonding and their effects on properties.
• Learn the law of definite composition and how it relates to compound stoichiometry.+ Show more