Grade 9 Science Worksheets

Learning Objectives

• Explain how fossil sequences reveal chronological patterns in evolutionary history.
• Identify transitional forms from combinations of ancestral and later traits.
• Distinguish homologous structures from analogous structures using anatomy.+ Show more

Learning Objectives

• Identify adenine, ribose, and three phosphate groups in ATP.
• Describe how ATP hydrolysis produces ADP and inorganic phosphate.
• Explain how ATP hydrolysis makes energy available for cellular work.+ Show more

Learning Objectives

• Explain how PCR, gel electrophoresis, and DNA sequencing differ.
• Describe how CRISPR can target genetic material for modification.
• Identify biotechnology applications in medicine, agriculture, and forensic science.+ Show more

Learning Objectives

• Explain how reproduction, mortality, immigration, and emigration change population size
• Describe carrying capacity in relation to available environmental resources
• Distinguish density-dependent factors from density-independent factors+ Show more

Learning Objectives

• Define adaptive radiation as diversification from a common ancestral lineage.
• Explain how ecological niches influence adaptations in related populations.
• Describe how geographic isolation can reduce gene flow.+ Show more

Learning Objectives

• Explain how RuBisCO incorporates carbon dioxide into organic molecules.
• Identify the roles of ATP and NADPH in the reduction phase.
• Distinguish carbon fixation, reduction, and regeneration in the Calvin cycle.+ Show more

Learning Objectives

• Compare simple diffusion and facilitated diffusion by their transport mechanisms.
• Explain osmosis and its role in cellular water balance.
• Describe how ATP powers active transport against concentration gradients.+ Show more

Learning Objectives

• Explain the three central principles of cell theory.
• Distinguish unicellular organisms from multicellular organisms using examples.
• Compare prokaryotic and eukaryotic cells by their organization.+ Show more

Learning Objectives

• Explain how heritable genetic variation provides material for natural selection
• Describe how reproductive success changes allele frequencies across generations
• Compare directional, stabilizing, and disruptive selection patterns+ Show more

Learning Objectives

• Define biodiversity and identify major human pressures on ecosystems.
• Explain how habitat fragmentation affects population connectivity and survival.
• Describe how fertilizer runoff can change aquatic ecosystem conditions.+ Show more

Learning Objectives

• Identify the main inputs and outputs of photosynthesis.
• Explain how chloroplast pigments capture light energy.
• Describe how water oxidation contributes to the light-dependent reactions.+ Show more

Learning Objectives

• Distinguish genotype from phenotype using relevant examples.
• Interpret genotype and phenotype frequencies in small populations.
• Describe how PCR supports genetic data analysis.+ Show more

Learning Objectives

• Define evolution using heritable traits and allele frequencies.
• Explain how natural selection changes allele frequencies across generations.
• Distinguish genetic drift from natural selection.+ Show more

Learning Objectives

• Classify ecosystem services by their functions and benefits.
• Explain how biodiversity supports pollination and nutrient cycling.
• Describe how ecosystems contribute to water purification and carbon sequestration.+ Show more

Learning Objectives

• Explain how RNA polymerase produces mRNA from a DNA template.
• Identify the roles of promoters and terminators in transcription.
• Describe how codons and anticodons guide amino acid assembly.+ Show more

Learning Objectives

• Explain how respiratory and circulatory systems supply oxygen to tissues
• Describe how digestion makes nutrients available for absorption
• Identify how the kidneys regulate water and electrolyte balance+ Show more

Learning Objectives

• Define speciation and explain how populations diverge over generations
• Compare allopatric and sympatric speciation using biological examples
• Identify factors that reduce gene flow between populations+ Show more

Learning Objectives

• Describe how fossils preserve evidence of past organisms and environments.
• Compare relative dating with radiometric dating methods.
• Explain how transitional fossils provide evidence of evolutionary relationships.+ Show more

Learning Objectives

• Identify major eukaryotic organelles and describe their primary functions
• Compare the roles of rough and smooth endoplasmic reticulum
• Explain how the Golgi apparatus processes and packages cellular materials+ Show more

Learning Objectives

• Distinguish genotype from phenotype in inherited traits
• Compare complete dominance, incomplete dominance, and codominance
• Interpret genetic crosses using Mendelian inheritance probabilities+ Show more

Learning Objectives

• Explain why DNA replication occurs before cell division.
• Describe semi-conservative replication using original and newly synthesized strands.
• Identify the roles of origins, helicase, primase, and DNA polymerase.+ Show more

Learning Objectives

• Explain how organelle abundance relates to specialized cell functions
• Compare the roles of smooth endoplasmic reticulum and mitochondria
• Describe how central vacuoles support water storage and cell firmness+ Show more

Learning Objectives

• Explain how electron transfer powers proton pumping across membranes.
• Describe how an electrochemical gradient stores potential energy.
• Explain how ATP synthase produces ATP through chemiosmosis.+ Show more

Learning Objectives

• Distinguish how light and electron microscopes produce magnified images
• Explain the differences among magnification, resolution, and contrast
• Interpret scale bars to estimate actual specimen dimensions+ Show more

Learning Objectives

• Explain how polygenic inheritance differs from single-gene inheritance.
• Distinguish epistasis from pleiotropy using biological examples.
• Compare penetrance and expressivity in inherited traits.+ Show more

Learning Objectives

• Identify the traditional taxonomic ranks from domain to species.
• Explain how binomial nomenclature standardizes scientific names.
• Compare morphological, developmental, and genetic classification evidence.+ Show more

Learning Objectives

• Explain the role of informed consent in biotechnology research
• Describe methods for protecting genetic privacy and personal information
• Evaluate benefits and risks of genome editing applications+ Show more

Learning Objectives

• Distinguish primary succession from secondary succession using soil conditions
• Explain how pioneer species contribute to soil development
• Identify factors that influence community composition during succession+ Show more

Learning Objectives

• Identify the roles of thermoreceptors and the hypothalamus in temperature control
• Compare vasodilation and vasoconstriction in regulating heat loss
• Explain how sweating and evaporation help cool the body+ Show more

Learning Objectives

• Identify reservoirs in the atmosphere, hydrosphere, lithosphere, and biosphere
• Explain how photosynthesis and decomposition transfer carbon
• Describe nitrogen fixation and its role in nitrogen cycling+ Show more

Learning Objectives

• Identify the phosphate, sugar, and base components of a nucleotide
• Compare the structures and sugars of DNA and RNA
• Apply complementary base-pairing rules to predict DNA sequences+ Show more

Learning Objectives

• Compare simple diffusion and facilitated diffusion by mechanism and energy use
• Explain how osmosis affects water movement across cell membranes
• Distinguish passive transport from energy-dependent active transport+ Show more

Learning Objectives

• Interpret standard pedigree symbols and biological relationships across generations
• Distinguish autosomal, X-linked, and mitochondrial inheritance patterns
• Explain how carrier status affects autosomal recessive inheritance+ Show more

Learning Objectives

• Explain how photosynthesis stores light energy in organic molecules.
• Trace energy transfer through producers and successive consumers.
• Identify the trophic roles of herbivores, carnivores, and decomposers.+ Show more

Learning Objectives

• Explain how allosteric regulation changes enzyme activity.
• Compare competitive and noncompetitive enzyme inhibition mechanisms.
• Describe how covalent modification regulates enzyme function.+ Show more

Learning Objectives

• Identify nephron structures involved in glomerular filtration
• Differentiate filtration, tubular reabsorption, and tubular secretion
• Explain how ADH regulates water conservation in the kidneys+ Show more

Learning Objectives

• Interpret branching patterns to identify common ancestors and descendant lineages.
• Distinguish rooted phylogenetic trees from unrooted trees.
• Classify monophyletic, paraphyletic, and polyphyletic groups using ancestry.+ Show more

Learning Objectives

• Explain how promoters and transcription factors influence transcription
• Compare the effects of enhancers and silencers on gene activity
• Describe how DNA methylation affects gene expression+ Show more

Learning Objectives

• Distinguish ecosystem resistance from ecosystem resilience using examples.
• Explain how disturbance frequency and severity affect ecosystem recovery.
• Describe how biodiversity and habitat connectivity support resilience.+ Show more

Learning Objectives

• Identify the roles of sensors, control centers, and effectors
• Distinguish negative feedback from positive feedback mechanisms
• Explain how negative feedback helps regulate rising blood pressure+ Show more

Learning Objectives

• Explain how chloroplasts and mitochondria contribute to energy transformations.
• Describe how the endoplasmic reticulum and Golgi apparatus process cellular materials.
• Explain how transport vesicles move materials between cellular compartments.+ Show more

Learning Objectives

• Understand how friction and aerodynamic drag oppose motion and transform mechanical energy into thermal energy.
• Explain how surface texture, normal force, and speed influence friction on different terrains.
• Describe how air density and shape affect drag on various objects like vehicles and wind turbine blades.+ Show more

Learning Objectives

• Understand what fossils are and how they form
• Identify the significance of transitional fossils
• Explain stratigraphy and radiometric dating techniques+ Show more

Learning Objectives

• Describe the different lunar phases and the geometric arrangements of Earth, Moon, and Sun that produce them.
• Distinguish between partial, total, and annular solar and lunar eclipses based on observational conditions.
• Explain the factors, such as node alignment and orbital inclination, that influence eclipse occurrence.+ Show more

Learning Objectives

• Understand the types of simple machines and their functions.
• Explain how simple machines transfer forces to reduce effort or change direction.
• Analyze real-world applications of simple machines in farm implements, tools, and construction equipment.+ Show more

Learning Objectives

• Explain the particle model as a representation of matter in different states.
• Describe how particle spacing, motion, and collisions explain macroscopic phenomena such as diffusion and pressure.
• Link observable behaviour of solids, liquids, and gases to particle arrangement and motion using Alberta examples.

Learning Objectives

• Understand the concept of net force as the vector sum of all forces acting on an object.
• Analyze how net force determines an object's acceleration and motion changes in real-world scenarios.
• Evaluate the effects of opposing forces such as friction and air resistance on net force calculations.+ Show more

Learning Objectives

• Explain Newton's three laws of motion and their applications in real-world contexts.
• Identify and analyze forces involved in different types of motion as described by Newtonian physics.
• Apply Newtonian reasoning to regional and everyday scenarios such as erosion control and playground safety.+ Show more