Grade 9 Worksheets

Learning Objectives

• Explain how solar and lunar eclipses occur using the relative positions of the Sun, Earth, and Moon.
• Describe how orbital inclination and nodes affect how often eclipses happen and where totality can be seen.
• Use eclipse geometry to make reasoned claims about shadow type (umbra vs. penumbra) and viewing conditions.

Learning Objectives

• Describe different types of intermolecular forces and their effects on physical properties.
• Explain how molecular structure influences intermolecular interactions.
• Compare London dispersion forces, dipole–dipole, and hydrogen bonding in terms of strength.+ Show more

Learning Objectives

• Explain how chemical properties (such as stability and solubility) influence environmental persistence and exposure.
• Assess benefits and risks of common chemicals by tracing routes of exposure and measurable impacts.
• Apply safe-handling, disposal, and alternative-selection strategies to reduce health and environmental harm.+ Show more

Learning Objectives

• Explain the principle of mechanical energy conservation in ideal systems.
• Describe how non-conservative forces affect energy exchange and system efficiency.
• Illustrate energy interconversion using spring-mass and gravitational models.+ Show more

Learning Objectives

• Understand how molecular, cellular, and organ-level interactions contribute to physiological functions and health.
• Analyze clinical and natural exemplars such as cystic fibrosis, heart failure, and metabolic syndrome to understand system dysfunction.
• Construct explanatory accounts connecting genetic variation to cellular responses and organ system performance.+ Show more

Learning Objectives

• Understand the origins and significance of World Cancer Day in raising awareness.
• Identify key milestones and campaigns in cancer prevention and early detection.
• Analyze how community engagement and cultural differences influence health awareness.+ Show more

Learning Objectives

• Identify the major organ systems and understand their roles in maintaining body homeostasis.
• Explain how different organ systems coordinate and communicate to regulate physiological functions.
• Describe the functions of the circulatory, respiratory, digestive, renal, nervous, and endocrine systems.+ Show more

Learning Objectives

• Understand the principle of conservation of atoms and mass in chemical reactions.
• Learn how to balance chemical equations to reflect mass preservation.
• Link symbolic chemical formulas to measurable mass relationships in reactions.+ Show more

Learning Objectives

• Understand the definition and characteristics of chemical change.
• Identify common indicators and evidence of chemical reactions.
• Distinguish between physical and chemical transformations at the microscopic level.+ Show more

Learning Objectives

• Recognize visual signs of chemical change, especially color shifts
• Identify different indicators of chemical reactions in laboratory and environmental contexts
• Understand how color changes signal the formation of new substances during chemical processes

Learning Objectives

• Understand how to interpret coefficient ratios in balanced chemical equations to relate amounts of reactants and products.
• Apply proportional relationships to calculate masses of substances involved in chemical reactions.
• Estimate mass changes during reactions such as corrosion or fuel consumption using relative mass concepts.+ Show more

Learning Objectives

• Understand the basic concepts of landforms and natural resources
• Describe Earth's processes that create and modify landforms
• Identify how resources are concentrated through geological processes

Learning Objectives

• Understand the concept of tradeoffs in engineering design.
• Identify competing goals such as strength, weight, cost, and manufacturability.
• Analyze how different design choices impact multiple performance criteria.+ Show more

Learning Objectives

• Calculate kinetic energy using mass and speed
• Calculate gravitational potential energy using mass, gravity, and height
• Explain mechanical energy transfers between kinetic and potential energy+ Show more

Learning Objectives

• Explain how energy is conserved during transfers within a system
• Distinguish energy reservoirs, transfers, and system boundaries
• Compare closed and isolated systems+ Show more

Learning Objectives

• Explain how mass, charge, and separation affect force magnitude
• Calculate gravitational and electrostatic force magnitudes using quantitative models
• Apply inverse-square relationships to predict changes in force+ Show more

Learning Objectives

• Explain how solar flux and albedo affect Earth's energy balance
• Describe how greenhouse gases transfer and re-emit infrared energy
• Explain how ocean heat transport influences regional climate patterns+ Show more

Learning Objectives

• Interpret P-wave and S-wave behavior as evidence for Earth’s layers
• Explain how density and composition distinguish Earth’s internal layers
• Describe how mantle convection redistributes thermal energy+ Show more

Learning Objectives

• Interpret long-term atmospheric carbon dioxide records
• Explain how fossil fuel combustion alters Earth systems
• Describe how deforestation can influence atmospheric carbon dioxide+ Show more

Learning Objectives

• Interpret field lines as representations of direction and relative magnitude.
• Explain how superposition combines overlapping field effects as vectors.
• Describe magnetic forces acting on moving charged particles.+ Show more

Learning Objectives

• Interpret branching patterns as hypotheses about common ancestry.
• Distinguish morphological characters from molecular data.
• Explain how shared derived characters support cladistics.+ Show more

Learning Objectives

• Calculate linear momentum from mass, velocity, and direction.
• Determine total momentum before and after an interaction.
• Apply momentum conservation to isolated systems and recoil.+ Show more

Learning Objectives

• Explain how conduction, convection, and radiation transfer thermal energy
• Calculate thermal energy transferred using Q = mcΔT
• Interpret positive and negative Q values for energy changes+ Show more

Learning Objectives

• Explain electromagnetic radiation using wave and photon descriptions.
• Relate frequency, wavelength, and photon energy using Planck’s relation.
• Describe how materials affect electromagnetic signals through absorption and attenuation.+ Show more

Learning Objectives

• Explain how stars form and produce energy during the main sequence.
• Describe how stellar mass affects lifetime and final outcome.
• Interpret the Hertzsprung-Russell diagram using brightness and temperature.+ Show more

Learning Objectives

• Compare mitigation and adaptation strategies using multiple variables
• Interpret economic, environmental, and social trade-offs
• Explain how scenario analysis supports climate decision making+ Show more

Learning Objectives

• Explain how runoff affects river discharge and sediment transport
• Analyze how erosion and deposition reshape Earth's surface
• Interpret hydrologic data as evidence of landscape change+ Show more

Learning Objectives

• Compare digital and analog transmission methods.
• Explain how bandwidth affects communication channels.
• Interpret signal-to-noise ratio and bit error rate.+ Show more

Learning Objectives

• Explain how fossils provide evidence for evolutionary change.
• Compare homologous structures as evidence of common ancestry.
• Interpret DNA similarities to investigate evolutionary relationships.+ Show more

Learning Objectives

• Explain how a protoplanetary disk contributed to planet formation
• Compare inner rocky planets with outer gas giants
• Describe evidence scientists use to study planetary origins+ Show more

Learning Objectives

• Compare resource choices using environmental and economic criteria
• Evaluate resource trade-offs involving water, land, and emissions
• Explain how extraction and remediation affect life-cycle impacts+ Show more

Learning Objectives

• Compare design solutions using measurable performance criteria
• Explain how life-cycle costs affect design evaluations
• Analyze uncertainty and sensitivity in design decisions+ Show more

Learning Objectives

• Identify geological and atmospheric processes that produce natural hazards
• Interpret hazard maps and recurrence intervals
• Explain how paleoevidence reveals past hazardous events+ Show more

Learning Objectives

• Explain how interaction time affects average collision force
• Describe how deformation can absorb energy during collisions
• Interpret force-time graphs to compare safety designs+ Show more

Learning Objectives

• Explain how gravity produces and maintains orbital motion
• Describe how orbital period relates to orbit size
• Explain how escape velocity affects spacecraft motion+ Show more

Learning Objectives

• Explain how soil conservation practices reduce erosion and protect productive soil
• Analyze how land use affects infiltration, runoff, and watershed health
• Explain how irrigation practices can cause groundwater depletion and salinization+ Show more

Learning Objectives

• Explain how renewable energy, storage, and grid capacity interact
• Describe how life-cycle accounting compares emissions across energy stages
• Explain how carbon capture can reduce some facility emissions+ Show more

Learning Objectives

• Define amplitude, frequency, wavelength, phase, and wave speed
• Calculate wave speed, frequency, and wavelength using v = f × λ
• Compare transverse and longitudinal wave examples+ Show more

Learning Objectives

• Explain how redshift supports evidence for an expanding universe
• Interpret how Hubble’s law relates distance to recession speed
• Describe how cosmic microwave background measurements constrain cosmic history+ Show more

Learning Objectives

• Explain how heritable variation affects survival and reproduction.
• Interpret how selection changes trait frequencies across generations.
• Compare directional, stabilizing, and disruptive selection patterns.+ Show more

Learning Objectives

• Explain relationships among model inputs, design variables, and outputs
• Describe how parameters support computational model development
• Explain how objective functions help compare design performance+ Show more

Learning Objectives

• Explain how amplitude, frequency, and phase encode information.
• Compare analog amplitude modulation with pulse-code modulation.
• Describe how multiplexing allows signals to share channels.+ Show more

Learning Objectives

• Explain how net force, mass, and acceleration are related
• Interpret free-body diagrams showing balanced and unbalanced forces
• Calculate acceleration using net force and mass+ Show more

Learning Objectives

• Identify functional, social, economic, environmental, and regulatory constraints
• Explain how stakeholder needs affect engineering design choices
• Compare conceptual designs using requirements and trade-offs+ Show more

Learning Objectives

• Explain how geographic separation contributes to speciation
• Compare allopatric and sympatric speciation models
• Describe how reproductive isolation reduces gene flow+ Show more

Learning Objectives

• Explain how occurrence and frequency contribute to hazard risk assessment
• Distinguish exposure from vulnerability in community hazard assessments
• Interpret return-period information and historical hazard records+ Show more

Learning Objectives

• Distinguish physical and chemical weathering processes.
• Explain how gravity drives mass wasting on hillslopes.
• Describe how flowing water transports and deposits sediment.+ Show more

Learning Objectives

• Compare prototyping methods by fidelity, materials, time, and purpose
• Select suitable prototypes for different design and testing needs
• Interpret performance measurements to guide prototype refinement+ Show more