Grade 9 Science Worksheets

Learning Objectives

• Describe the main steps involved in glycolysis.
• Identify key intermediates and energy changes during glycolysis.
• Explain the difference between aerobic and anaerobic pathways after glycolysis.+ Show more

Learning Objectives

• Interpret paleoclimate evidence from various proxy records such as ice cores, tree rings, marine sediments, and speleothems.
• Understand proxy indicators like isotopic ratios, growth increments, and microfossil assemblages.
• Relate proxy records to past climate variability, including glacial-interglacial cycles and abrupt climate events.+ Show more

Learning Objectives

• Use quantitative and qualitative criteria to compare competing engineering design solutions.
• Explain how life-cycle cost, manufacturability, and environmental impact affect design choices.
• Apply uncertainty and sensitivity reasoning when ranking alternatives using documented assumptions.+ Show more

Learning Objectives

• Explain how heritable traits can change in frequency due to differential survival and reproduction.
• Identify how environmental conditions determine which traits are advantageous.
• Use models to connect trait variation, reproduction, and changing phenotype proportions over generations.+ Show more

Learning Objectives

• Explain how hazard risk is evaluated using occurrence, frequency, and consequences for earthquakes, volcanoes, tsunamis, hurricanes, and floods.
• Use ideas from probabilistic models and historical records to interpret return-period information and its limits.
• Describe how exposure, vulnerability, and cascading system effects influence community and infrastructure susceptibility.+ Show more

Learning Objectives

• Understand measures of dispersion such as variance, interquartile range, and range.
• Explain how variability influences confidence in statistical estimates.
• Interpret overlaps in distribution shapes and effects on hypothesis testing.+ Show more

Learning Objectives

• Describe the various types of natural hazards and their causes.
• Identify geologic and atmospheric indicators used to assess hazard risk.
• Interpret hazard maps and recurrence intervals to evaluate potential impacts.+ Show more

Learning Objectives

• Explain the origin and characteristics of magnetic fields from permanent magnets and moving electric charges.
• Understand how magnetic field lines indicate direction and strength of magnetic fields.
• Describe real-world applications of magnetic fields, including compass navigation and industrial sensing.+ Show more

Learning Objectives

• Use the constant-acceleration kinematic equations to relate displacement, time, velocities, and acceleration
• Apply sign conventions correctly when analyzing vertical free-fall and horizontal/vertical components of projectile motion
• Select and rearrange the appropriate equation to predict motion from given initial conditions

Learning Objectives

• Understand the relationships between Earth's, Moon's, and Sun's orbits and how they influence phenomena like seasons, lunar phases, and tides.
• Describe how Earth's axial tilt and orbital eccentricity generate seasonal and climate variations.
• Explain the cyclical nature of lunar phases and their relation to the Moon's orbit around Earth.+ Show more

Learning Objectives

• Understand different types of representation models used in science and engineering.
• Identify the purpose and features of various models like diagrams, graphs, and physical models.
• Explain how models simplify complex systems for understanding and analysis.+ Show more

Learning Objectives

• Explain how nucleic acid sequences determine amino acid chains and protein structures.
• Connect molecular code and folding to organelle architecture such as ribosomes, endoplasmic reticulum, and mitochondria.
• Identify examples of proteins like hemoglobin and membrane transport proteins and their structures-function relationships.+ Show more

Learning Objectives

• Explain Newton's three laws of motion and how they relate to force, mass, and acceleration.
• Analyze free-body diagrams to identify forces acting on objects.
• Use vector components to resolve forces and predict object trajectories.+ Show more

Learning Objectives

• Identify observable signs that indicate a chemical change has occurred.
• Describe real-world examples of chemical change in the environment and industry.
• Distinguish between physical and chemical changes using evidence markers.+ 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

• 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 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 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

• 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 carbon, nitrogen, and phosphorus move among ecosystem reservoirs
• Identify decomposition, fixation, mineralization, and sedimentation in nutrient cycling
• Apply mass-balance ideas to nutrient reservoirs and fluxes+ 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

• 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

• 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 why energy decreases between successive trophic levels
• Interpret food webs and trophic pyramids as ecosystem models
• Describe ecological efficiency and production-to-biomass ratios+ 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

• 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

• 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

• 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 photosynthesis stores energy and cycles carbon and oxygen
• Describe how cellular respiration affects producer biomass and consumer energy
• Calculate net primary productivity from production and respiration values+ 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

• 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

• 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 tectonic forces shape continental and ocean-floor features
• Describe how seafloor spreading changes Earth's surface
• Explain how subduction contributes to volcanic arc formation+ 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

• 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

• 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

• 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

• 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

• 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 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

• 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

• 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

• 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 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 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

• 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