Grade 9 Science Worksheets

Learning Objectives

• Explain how the water cycle moves water through interconnected reservoirs using evaporation, condensation, precipitation, and runoff.
• Describe how carbon shifts among the atmosphere, living things, oceans, and rocks through photosynthesis, respiration, and chemical exchange.
• Connect solar radiation and Earth’s radiation balance to weather and long-term temperature change.

Learning Objectives

• Explain how heat transfer depends on temperature differences between a system and its surroundings.
• Describe how work is done when a force acts over a distance and transfers energy to or from a system.
• Use the idea of system energy changes due to transfers to analyze physical and chemical changes.

Learning Objectives

• Explain how to determine the net force when two or more forces act in opposite directions.
• Predict how net force magnitude and direction determine acceleration direction.
• Use particle and force reasoning to justify answers about motion changes over time.+ Show more

Learning Objectives

• Explain how conservation of matter applies to chemical reactions
• Balance simple chemical equations by matching atom counts of each element
• Interpret reaction coefficients as indicating relative particle counts+ Show more

Learning Objectives

• Explain particle conservation as the idea that atoms of each element are not created, destroyed, or lost during chemical reactions.
• Use the particle view to describe how reactants rearrange into products while maintaining the same number of each type of atom.
• Interpret conservation of matter using submicroscopic particle diagrams and atom counts.+ Show more

Learning Objectives

• Explain how energy transfer efficiency changes biomass across trophic levels
• Interpret evidence from biomass, population trends, and nutrient concentrations
• Describe how decomposition returns matter and supports nutrient cycling+ Show more

Learning Objectives

• Explain how waves can transfer energy without transporting matter overall
• Relate frequency, wavelength, and amplitude to observable wave behavior
• Use wave property descriptions to predict how a wave would change its energy and appearance+ Show more

Learning Objectives

• Explain the steps in a design cycle and how feedback leads to improvements.
• Identify design requirements and constraints in an engineering problem.
• Use evidence to justify a design refinement.+ Show more

Learning Objectives

• Explain how energy flows through food chains in one direction while decreasing at each trophic level
• Describe how matter cycles through organisms and the environment through processes that rearrange atoms
• Use trophic-level and biomass ideas to interpret how organisms incorporate and redistribute matter and energy

Learning Objectives

• Explain how cellular structures support specific functions (storage, energy conversion, selective exchange).
• Describe how organism-level body structures support tasks such as protection, movement, and support.
• Use models to connect a structure’s physical properties to its biological role.

Learning Objectives

• Explain how wave speed, frequency, and wavelength are related for waves traveling in the same medium.
• Use the relationship v = fλ to predict how frequency changes affect wavelength.
• Connect timing features of a wave to spatial spacing features when pulses move.

Learning Objectives

• Explain how exchange rates between reservoirs change carbon in the atmosphere over time.
• Distinguish short-term cycling from slow geologic movement of carbon through rocks.
• Describe how temperature and precipitation control when water stored in ice or groundwater returns to the cycle.+ Show more

Learning Objectives

• Explain how data and diagrams help communicate design decisions to others.
• Identify how labeled component relationships support understanding of a design.
• Use reasoning to connect test results to design changes, including trade-offs.+ Show more

Learning Objectives

• Explain how disturbances can change ecosystem stability by altering species interactions and environmental conditions
• Describe how feedback processes and recovery rates affect whether an ecosystem returns to its prior state
• Use evidence from population trends and community structure to reason about gradual versus rapid ecosystem shifts+ Show more

Learning Objectives

• Explain how instrument scales, calibration, and consistent units improve measurement accuracy.
• Identify how significant figures represent precision and justified measurement limits.
• Convert between units and apply appropriate rounding rules to recorded data.+ Show more

Learning Objectives

• Explain how cell membranes regulate transport of nutrients and wastes
• Describe how cells use energy to power chemical reactions needed for growth
• Use models to predict how cells maintain internal balance and respond to environmental changes+ Show more

Learning Objectives

• Explain how wave frequency and wavelength are related to repeating patterns in a signal.
• Describe how amplitude affects the size of a wave disturbance and its associated energy.
• Translate between wave descriptions by using the links among frequency, wavelength, and amplitude.

Learning Objectives

• Explain how observed velocity depends on the chosen frame of reference.
• Use vector addition to determine a relative velocity between two moving objects.
• Interpret how different frames can change calculated displacement, speed, and apparent acceleration.

Learning Objectives

• Explain how work relates to energy transfer using force and distance.
• Compare how simple machines change the magnitude or direction of an applied force.
• Calculate mechanical advantage and interpret the trade-off between force and distance.

Learning Objectives

• Identify how levers, wheel and axle, pulleys, inclined planes, and screws transfer forces to reduce effort or change direction.
• Explain the difference between ideal mechanical advantage and practical mechanical advantage when friction is present.
• Use relationships among input force, load, and displacement to reason about how simple machines affect work and energy.+ Show more

Learning Objectives

• Describe the process of photosynthesis and its main components.
• Identify inputs, outputs, and the steps involved in photosynthesis.
• Explain the role of pigments and chloroplasts in capturing light energy.+ Show more

Learning Objectives

• Explain the sequence of lunar phases and how they occur due to the Sun-Earth-Moon geometry.
• Describe how the fraction of the illuminated Moon affects its appearance and brightness.
• Predict the progression of lunar phases over the lunar month.+ Show more

Learning Objectives

• Understand the main types of tissues and their functions.
• Identify the structures and specialized cells of different tissue types.
• Describe how tissue organization contributes to organ function.+ Show more

Learning Objectives

• Explain how wind and solar variability affects electrical grid supply and demand balance.
• Describe how dispatch coordination and energy storage help manage intermittency.
• Evaluate how infrastructure choices influence economic viability and environmental outcomes.

Learning Objectives

• Interpret symptom descriptions, topology, and measurements to infer likely electrical fault types
• Differentiate evidence patterns consistent with open circuits, short circuits, and degraded components
• Use logical reasoning to connect instrument readings to restoration and safety implications+ Show more

Learning Objectives

• Explain how slope on a displacement–time graph relates to velocity.
• Explain how slope on a velocity–time graph relates to acceleration.
• Use area under a velocity–time graph to determine displacement.+ Show more

Learning Objectives

• Explain how net force is found by vector addition of forces acting on an object
• Predict motion changes using the relationship between net force, direction, and acceleration
• Determine when an object is in equilibrium using the idea of zero net force

Learning Objectives

• Use constant-acceleration equations to relate displacement, velocities, acceleration, and time.
• Apply a consistent sign convention to predict motion and stopping distance.
• Solve numerical word problems using substitution and correct units.+ Show more

Learning Objectives

• Describe how to relate acceleration to velocity-time graphs for braking scenarios.
• Use net-force reasoning to connect forces to changes in motion.
• Apply the work-energy idea to predict how stopping distance changes with slope and friction.

Learning Objectives

• Define mechanical advantage as a ratio that compares load force to input force and/or input distance to load distance
• Calculate and interpret mechanical advantage for simple lever situations and pulley-based systems
• Explain how increased mechanical advantage often changes displacement and trade-offs in force and distance

Learning Objectives

• Explain how resistive losses and power factor reduce electrical system efficiency
• Compare metrics used to evaluate efficiency and operating cost in electrical systems
• Describe design choices that improve performance while meeting operational constraints

Learning Objectives

• Describe how forces can change an object’s motion through push or pull interactions
• Differentiate between contact forces and non-contact forces using Alberta-style examples
• Explain how force magnitude and direction combine to predict the direction of motion using qualitative reasoning+ Show more

Learning Objectives

• Define speed, velocity, and acceleration using distance, displacement, time, and direction
• Distinguish scalar and vector quantities in motion problems
• Apply sign conventions and unit conversions to compare motions

Learning Objectives

• Explain how friction and drag oppose motion and convert mechanical energy into thermal energy
• Use coefficients of friction and drag coefficients to estimate resistance forces
• Identify how surface texture, normal force, relative speed, and air density affect friction and drag

Learning Objectives

• Explain how magnets and moving electric charges create magnetic fields
• Use field line orientation to predict force direction on magnetic materials
• Relate current direction in a wire to magnetic field direction using right-hand rules

Learning Objectives

• Explain how mechanical energy changes between kinetic and potential forms through work interactions
• Describe how non-conservative forces like friction convert mechanical energy into thermal energy
• Use energy bookkeeping to predict feasible speeds and heights for real situations+ Show more

Learning Objectives

• Identify the purpose of grounding, overcurrent protection, and proper insulation in preventing electrical hazards.
• Interpret labels on common electrical protective devices to determine their intended function.
• Explain how environmental conditions (moisture, outdoor use, and corrosion risk) affect safe installation choices.+ Show more

Learning Objectives

• Identify how displacement, velocity, and acceleration are represented on motion graphs
• Use slope and area to calculate or interpret speed, acceleration, and displacement
• Explain what curved segments and changes in slope mean for motion over time+ Show more

Learning Objectives

• Explain how power relates to the rate of energy transfer
• Calculate or compare efficiency using input energy and useful output energy
• Interpret how energy losses affect practical machine performance+ Show more

Learning Objectives

• Explain how voltage transformation supports efficient power transmission to consumers
• Describe how feeder topology and regional constraints affect reliability and capacity
• Predict how electrical faults can propagate through a power distribution network+ Show more

Learning Objectives

• Explain how inertia affects whether the motion of an object changes when forces are applied
• Use Newton’s second law to predict how acceleration changes with net force and mass
• Apply Newton’s third law to real situations involving recoil and anchored objects+ Show more

Learning Objectives

• Describe how an electric motor converts electrical energy into mechanical work
• Explain how a generator produces electrical energy using electromagnetic induction
• Compare motor and generator functions based on energy flow in a simple system+ Show more

Learning Objectives

• Describe how different body systems interact to maintain homeostasis.
• Explain feedback mechanisms, set points, and system crosstalk in physiological regulation.
• Analyze examples of thermoregulation, acid-base balance, and responses to stressors.

Learning Objectives

• Interpret molecular and phenotypic information to analyze inheritance patterns.
• Apply techniques such as genotype frequency analysis, PCR markers, and sequencing reads to identify genetic variants.
• Compare observed and expected trait distributions to detect linkage, heterozygosity, or selection.+ Show more

Learning Objectives

• Compare how series and parallel circuits distribute current and voltage across components.
• Predict brightness changes for loads connected in series versus parallel.
• Identify which circuit arrangement supports reliability when one component fails.

Learning Objectives

• Describe how linear and nonlinear components behave using resistance and current–voltage ideas
• Explain how temperature changes affect thermistors and power dissipation in resistors
• Identify how power ratings and operating limits help prevent circuit damage+ Show more

Learning Objectives

• Distinguish physical changes from chemical changes using evidence of new substances.
• Explain how melting, freezing, and crushing can change phase or form without changing the substances present.
• Use conservation of identity language to describe what happens to a material during a physical change.

Learning Objectives

• Explain how the particulate model describes solids, liquids, and gases using particle motion and spacing
• Use particle ideas to predict changes in diffusion, pressure, and temperature
• Identify how particle collisions relate to energy transfer and pressure