Grade 9 Science Worksheets

Learning Objectives

• Explain how scientific evidence contributed to changes in atomic models.
• Identify relationships between atomic number and electron arrangement.
• Connect periodic table position with chemical properties.+ Show more

Learning Objectives

• Identify research questions related to real biological diversity problems.
• Formulate predictions and examine scientific investigation methods.
• Interpret observations and data to develop evidence-based explanations.+ Show more

Learning Objectives

• Understand ecological, economic, and health risks associated with genetic technologies.
• Evaluate trade-offs in adopting novel genetic approaches.
• Identify mitigation strategies and long-term monitoring methods.+ Show more

Learning Objectives

• Understand how simple machines combine to form compound machines
• Learn methods to calculate overall mechanical advantage using force and displacement
• Differentiate between ideal and actual mechanical advantage+ Show more

Learning Objectives

• Understand the roles of insulin and glucagon in blood glucose regulation.
• Describe how endocrine feedback loops maintain metabolic homeostasis.
• Identify tissues involved in glucose uptake and release.+ Show more

Learning Objectives

• Explain how fossil records provide evidence of past life using preservation, stratigraphy, and dating methods.
• Distinguish between relative age and absolute age and describe how radiometric dating supports timelines.
• Evaluate how taphonomy and preservation bias affect what organisms appear in the fossil record.

Learning Objectives

• Define chemical properties and identify common examples.
• Explain signs that indicate a chemical change has occurred.
• Differentiate between physical and chemical changes based on reaction evidence.+ Show more

Learning Objectives

• Explain how different organelles coordinate to support cellular functions.
• Describe the flow of genetic information from nucleus to protein secretion.
• Identify the roles of mitochondria, lysosomes, and peroxisomes in maintaining homeostasis.+ Show more

Learning Objectives

• Understand the factors that influence population growth and decline.
• Identify density-dependent and density-independent factors affecting populations.
• Analyze how population patterns impact community structure and ecosystem dynamics.

Learning Objectives

• Understand the concepts of random and systematic uncertainty in measurements.
• Learn how to quantify uncertainty using statistical descriptors such as standard deviation and standard error.
• Apply basic error propagation methods to combined quantities.+ Show more

Learning Objectives

• Understand the symbols and conventions used in pedigree charts.
• Identify inheritance patterns such as autosomal dominant, autosomal recessive, X-linked, and mitochondrial.
• Analyze pedigree data to determine likely modes of inheritance.+ Show more

Learning Objectives

• Understand the structure and function of different classes of levers
• Identify the components and principles of levers
• Explain how levers modify force and displacement to achieve mechanical advantage+ Show more

Learning Objectives

• Understand key concepts related to Science
• Apply knowledge through practice questions
• Demonstrate comprehension of the material

Learning Objectives

• Distinguish between contact forces and non-contact forces
• Identify examples of different types of forces
• Understand how forces act on objects in different scenarios

Learning Objectives

• Define what compound machines are and identify examples
• Explain how simple machines combine to form compound machines
• Calculate overall mechanical advantage considering force and distance+ Show more

Learning Objectives

• Understand the concept of ecosystem services and their importance to human well-being.
• Identify different types of ecosystem services and how biodiversity supports them.
• Evaluate human impacts on ecosystem services and the resulting trade-offs.

Learning Objectives

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

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

• 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

• 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

• 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

• Resolve gravitational force into components parallel and perpendicular to an inclined plane and relate them to net force and acceleration.
• Explain how mechanical advantage changes the required applied force on an inclined plane, trading force for distance.
• Analyze how friction and the slope angle affect motion and determine qualitative energy/work outcomes.

Learning Objectives

• Understand the key concepts of complex inheritance including polygenic traits, epistasis, and pleiotropy.
• Identify factors influencing phenotype beyond simple Mendelian inheritance.
• Analyze how environmental and genetic factors interact to shape observable traits.

Learning Objectives

• Describe the process of subduction and how it forms deep oceanic trenches.
• Explain the geological and seismic phenomena associated with subduction zones.
• Identify factors that influence the topography and hazards of subduction margins.+ Show more

Learning Objectives

• State the principle of conservation of mass in closed systems during chemical reactions
• Use mass accounting to predict that total mass of reactants equals total mass of products
• Distinguish true mass conservation in closed environments from apparent changes caused by gas exchange in open systems+ Show more

Learning Objectives

• Understand the concept of tectonic plates and their movements.
• Identify the causes of plate motion such as mantle convection, slab pull, and ridge push.
• Recognize the effects of plate interactions, including earthquakes, volcanism, and mountain building.+ Show more

Learning Objectives

• Describe the functions of key organelles in eukaryotic cells.
• Explain how organelle specialization contributes to cellular efficiency.
• Identify the structures involved in energy transfer and macromolecule processing.+ Show more

Learning Objectives

• Understand the structure and functions of physical barriers like skin and mucosa in immune defense.
• Identify cellular mediators involved in innate and adaptive immunity.
• Explain mechanisms of inflammation, memory formation, and immune modulation by external factors.+ Show more

Learning Objectives

• Understand the concept of energy profiles and their role in chemical reactions.
• Identify activation energy and how it affects reaction rates.
• Differentiate between exothermic and endothermic reactions based on enthalpy change.+ Show more

Learning Objectives

• Understand the principle of conservation of mass during chemical reactions.
• Interpret balanced chemical equations to reflect mass conservation.
• Link measurable mass changes to molecular rearrangements in reactions.+ Show more

Learning Objectives

• Understand how mole relationships connect masses of reactants and products through balanced equations.
• Learn to calculate molar masses and convert between mass and amount of substance.
• Recognize the significance of coefficients in balanced chemical equations for mole ratios.+ Show more

Learning Objectives

• Understand the fundamental mechanisms driving evolution, including natural selection, genetic drift, mutation, and gene flow.
• Describe how these mechanisms influence allele frequencies and contribute to long-term changes in populations.
• Explain the roles of adaptation, divergence, and variation in the evolution of species.

Learning Objectives

• Understand the key factors affecting energy system efficiency, including resistive losses, power factor, and device selection.
• Identify strategies for improving electrical system performance and reducing environmental impact.
• Analyze different loss mechanisms in electrical systems and compare their significance.+ Show more

Learning Objectives

• Understand Newton’s first law as a statement about inertia and the relationship between net external force and motion.
• Differentiate between static and dynamic equilibrium in the context of balanced forces.
• Explain the role of friction and low-friction surfaces in apparent perpetual motion.+ Show more

Learning Objectives

• Describe mechanisms of molecular movement across cell membranes including diffusion, osmosis, and active transport.
• Explain the roles of electrochemical gradients and membrane potential in transporting molecules.
• Compare paracellular and transcellular pathways in epithelial layers.+ Show more

Learning Objectives

• Understand how multiple bodies and forces interact within complex mechanical systems.
• Apply Newton's laws and energy principles to analyze system motion.
• Identify energy transfer, energy loss, and dominant forces during system events.+ Show more

Learning Objectives

• Understand how mechanical systems transfer energy between kinetic and potential forms.
• Identify examples of energy transfer such as braking and spring compression.
• Explain how energy is conserved and transformed into heat during mechanical interactions.+ Show more

Learning Objectives

• Understand how friction opposes relative motion between surfaces and converts kinetic energy into thermal energy.
• Differentiate between static and kinetic friction and identify their effects during motion.
• Explain factors that influence the magnitude of frictional forces, including surface properties and normal force.+ Show more

Learning Objectives

• Understand how to represent all external forces acting on a single object using free body diagrams.
• Identify and sketch vectors for forces such as gravity, normal, friction, tension, and applied forces.
• Calculate net force from vector components and relate it to the resulting acceleration.+ Show more

Learning Objectives

• Define and explain the concepts of power and efficiency in mechanical systems.
• Calculate power and efficiency in simple systems.
• Understand how energy losses affect the performance of machines.+ Show more

Learning Objectives

• Understand how inclined planes decompose gravitational force into components parallel and perpendicular to the surface.
• Calculate the mechanical advantage of inclined planes and understand their effect on applied force and displacement.
• Analyze the effects of friction and slope angle on net acceleration and energy transfer during motion on inclined planes.+ Show more

Learning Objectives

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

Learning Objectives

• Understand the relationship between net force, mass, and acceleration.
• Analyze how changes in force or mass affect acceleration.
• Interpret vector quantities and their directions in force analysis.+ Show more

Learning Objectives

• Explain the three laws of motion proposed by Isaac Newton.
• Identify observable effects of Newton's laws in real-world scenarios.
• Describe how forces influence the motion of objects.+ Show more

Learning Objectives

• Understand the fundamental concepts of chemical reactions and how they are represented.
• Identify different types of chemical reactions using formulas and symbolic equations.
• Explain the process of bond breaking and forming during chemical reactions.+ Show more