Grade 9 Science Worksheets

Learning Objectives

• Understand the structure and function of the plasma membrane in cells.
• Differentiate between passive and active transport processes across membranes.
• Identify various proteins involved in membrane transport and their roles.+ Show more

Learning Objectives

• Understand how microscopes provide visual models of cell structures and scales.
• Identify differences between light microscopes and electron microscopes in observing cells.
• Interpret diagrammatic and physical models to comprehend cellular relationships and functions.+ Show more

Learning Objectives

• Understand the functions of various organelles within eukaryotic cells.
• Identify how organelle specialization contributes to cellular efficiency and coordination.
• Describe the roles of mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, and peroxisomes.+ Show more

Learning Objectives

• Understand the structure and function of various organs in the human body.
• Identify how tissues work together to form organs and systems.
• Explain the importance of organ systems for organismal survival.+ Show more

Learning Objectives

• Understand how the nervous and endocrine systems coordinate responses to stimuli.
• Identify the roles of nerve impulses and hormones in maintaining homeostasis.
• Explain the interaction between neural signals and hormonal responses.+ Show more

Learning Objectives

• Understand how feedback loops, redundancy, and cross-regulation maintain system coordination in the body.
• Identify examples of multi-system responses during exercise.
• Explain how disruptions in one component affect overall homeostasis.+ Show more

Learning Objectives

• Describe how the body regulates internal temperature in response to environmental changes.
• Identify key mechanisms such as sweating, shivering, and blood flow adjustments involved in thermoregulation.
• Explain the role of the hypothalamus in maintaining homeostasis.+ Show more

Learning Objectives

• Identify and describe the major tissue types in the human body.
• Understand the functions of epithelial, connective, muscle, and nervous tissues.
• Explain how tissue structure relates to tissue function and organ properties.+ Show more

Learning Objectives

• Explain the concept of centripetal force and its role in circular motion.
• Understand how speed and radius affect centripetal acceleration.
• Identify forces such as tension, friction, and normal force that maintain curved trajectories.+ Show more

Learning Objectives

• Understand the principle of conservation of energy in isolated systems.
• Explain how kinetic and potential energy interchange during motion.
• Identify effects of nonconservative forces, such as friction, on mechanical energy.+ Show more

Learning Objectives

• Explain how mechanical systems transfer energy as kinetic or potential energy.
• Identify examples of energy transfer such as braking a bicycle or compressing a spring.
• Describe how work, collisions, and friction relate to energy transfer and thermal energy.+ Show more

Learning Objectives

• Understand the relationship between net force, mass, and acceleration as described by Newton's second law.
• Analyze how direction affects force and acceleration vectors.
• Apply the concept of net force to predict changes in an object's motion.+ Show more

Learning Objectives

• Understand the purpose and components of free body diagrams.
• Learn how to sketch and interpret vectors for forces acting on objects.
• Calculate net force and analyze how forces contribute to motion.+ Show more

Learning Objectives

• Describe the nature and effects of static and kinetic friction.
• Explain how surface properties and normal force influence friction.
• Analyze real-world examples of friction's role in motion and energy transfer.+ Show more

Learning Objectives

• Understand how inclined planes decompose gravitational forces into components.
• Explain the concept of mechanical advantage and how it reduces required force.
• Analyze the effects of friction and slope angle on motion and energy transfer.+ Show more

Learning Objectives

• Understand how impulse relates force, time, and change in momentum during collisions.
• Differentiate between elastic and inelastic collisions based on energy conservation.
• Analyze force-time profiles and energy transformations in collision scenarios.+ Show more

Learning Objectives

• Understand the concept of inertia and how it relates to an object's mass.
• Explain real-world examples of inertia to demonstrate understanding.
• Analyze how forces overcome inertia to change an object's motion.+ Show more

Learning Objectives

• Understand the definition of net force and how it affects motion.
• Learn how forces balance and unbalance influence acceleration.
• Develop skills to resolve forces into components and calculate net effect.+ Show more

Learning Objectives

• Understand how mass influences acceleration when a force is applied.
• Distinguish between inertial mass and weight in response to forces.
• Apply the force–acceleration relationship in problem-solving and practical scenarios.+ Show more

Learning Objectives

• Understand the three fundamental laws of motion described by Newton.
• Explain how forces influence the movement of objects in observable scenarios.
• Analyze real-world examples to identify which of Newton's laws are demonstrated.+ Show more

Learning Objectives

• Understand how ice cores, sediments, and proxies reveal past atmospheric compositions.
• Interpret ratios of gases and isotopes in understanding climate history.
• Analyze proxy data to distinguish natural variability from human impact.+ Show more

Learning Objectives

• Understand the concept of power as the rate of energy transfer in mechanical systems.
• Explain the meaning of efficiency and how it compares useful output energy to input energy.
• Identify factors that cause energy loss in systems such as heat, sound, or deformation.+ Show more

Learning Objectives

• Explain how forces interact within complex mechanical systems to influence motion.
• Apply Newton's laws to analyze forces and predict outcomes in multi-body systems.
• Evaluate energy transfer, dissipation, and system behavior during collisions and linked mechanisms.+ Show more

Learning Objectives

• Understand the concept of work in physics as energy transfer through force and displacement.
• Identify the conditions under which work is positive or negative.
• Explain how work relates to changes in kinetic and potential energy.+ Show more

Learning Objectives

• Describe the main processes and inputs of photosynthesis.
• Identify the components and stages involved in converting light energy into chemical energy.
• Explain the role of pigments, water oxidation, and the production of ATP and NADPH.+ Show more

Learning Objectives

• Explain how Earth’s axial tilt and Earth–Sun geometry cause seasonal changes
• Describe how daylight length and sun angle affect the amount of solar energy received
• Use orbital and tilt ideas to predict how day length changes across seasons and latitudes

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

• Use allele combinations of parents to predict expected phenotype proportions in offspring
• Explain how dominant alleles can mask recessive alleles in observed traits
• Justify trait predictions using probability patterns across multiple generations

Learning Objectives

• Explain how temperature, humidity, wind, and air pressure measurements relate to observable weather patterns.
• Interpret how dew point and precipitation totals can indicate moisture and storm development.
• Compare short-term weather variability with longer-term climate trends using data averages.+ Show more

Learning Objectives

• Explain how Earth, the Moon, and the Sun create a predictable cycle of Moon phases.
• Describe why eclipses do not happen every month even though the Moon orbits Earth regularly.
• Identify alignment conditions needed for solar and lunar eclipses.+ Show more

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 a device can be modeled as a system with inputs, outputs, energy transfers, and material flow
• Identify system boundaries and track how changes in components affect reliability and performance
• Use systems thinking to predict how a mechanical, sensing, or control part influences grip force, accuracy, and failure risk

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 prototypes generate evidence that can be compared to success criteria.
• Identify examples of measurable performance criteria such as strength, temperature, flow rate, and accuracy.
• Use data reasoning to decide whether a design needs refinement or a new approach.

Learning Objectives

• Explain how repeated testing can be used to refine a design toward performance criteria
• Describe how changes to dimensions, materials, and component interactions connect to observed outcomes
• Identify reliability and safety-margin considerations when revising a solution after test evidence

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 gravity provides the centripetal force that keeps objects in curved orbits
• Describe how orbital speed and distance relate as an object moves around a central body
• Use observations of repeating sky patterns to connect them to regular orbital periods

Learning Objectives

• Explain how scientific arguments connect evidence to reasoning to support or weaken a claim.
• Identify relevant data patterns and infer what they imply about an explanation.
• Evaluate alternative interpretations when data are incomplete or uncertain.+ Show more

Learning Objectives

• Identify how graph axes, labels, and scales affect interpretation of data patterns.
• Interpret qualitative trends and quantitative relationships from graphs and tables.
• Distinguish likely outliers from typical values using spread and overall direction.+ 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 controlling variables helps link a cause to an observed effect in an investigation.
• Identify which variable is independent, dependent, and controlled in a given scenario.
• Describe measurement practices that improve reliability and accuracy of data.+ Show more

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

• Identify common sources of uncertainty in scientific measurements and models
• Explain how uncertainty affects confidence in comparing results to a true value
• Distinguish between experimental variation and model simplifications as uncertainty sources+ Show more

Learning Objectives

• Explain how a scientific model links evidence to causal mechanisms within limits
• Identify how new evidence can lead to refining a model by changing assumptions or relationships
• Compare predicted outcomes from a model with observations and describe how mismatches guide refinement+ Show more

Learning Objectives

• Explain what error bars and uncertainty bands represent in measurement data
• Use overlap (or lack of overlap) of uncertainty ranges to judge whether differences are meaningful
• Distinguish between random measurement noise and evidence of a trend across conditions+ Show more

Learning Objectives

• Explain how constraints limit design options in engineering problems
• Identify criteria for success and describe how criteria weighting affects a final design choice
• Compare designs by describing trade-offs among cost, time, materials, safety, and reliability

Learning Objectives

• Explain how climate variability is identified by comparing many weather measurements over time
• Differentiate climate variability from persistent climate change
• Interpret how ocean-atmosphere shifts can change regional weather patterns+ 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