Ontario Grade 9 Destreamed Science (SNC1W1) 2026 Practice Exam

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• Which factors are defined as the living components affecting ecosystems?
• What does an ecosystem's carrying capacity refer to?
• Which of the following elements is NOT commonly found in organic molecules?
• Which of the following organisms is at the top of a food chain?
• What is the unit of force in the SI system?
• What term describes the interaction of all living and non-living components within an environment?
• What is the smallest particle of an element?
• What process is described by the transformation of chemical energy in food into usable energy?
• What term describes an organism that produces energy through photosynthesis?
• Which of the following is an example of a pure substance?
• Which of the following materials typically has the lowest resistance?
• Which of the following is an example of a compound?
• How is the efficiency of a light bulb calculated?
• What type of energy is stored in food?
• What does Ohm's law relate?
• What is the layer of gases that surrounds Earth called?
• In ecology, what do we call the process by which plants produce their own food using sunlight?
• What type of celestial body is formed from the collapse of a massive star after a supernova explosion?
• What is the fundamental unit of life?
• What type of batteries are known for being non-rechargeable and providing direct current?
• What is defined as kinetic energy?
• What is a hypothesis in scientific terms?
• What is the primary source of energy in most electrical circuits?
• What is a group of the same species living in an area called?
• What is the primary source of energy for the Earth?
• Which is a characteristic of a chemical property?
• What is the primary function of the thyroid gland?
• What is natural selection?
• What term refers to the position of an organism within a food chain?
• Which sphere contains all ecosystems and living organisms on Earth?
• Which level of organization comes after atoms in biological systems?
• Which equation is used for calculating power in an electrical circuit?
• What is the term for physically removing invasive species from an area?
• What phenomenon describes the apparent shift in position of an object due to the movement of the observer?
• What event is characterized by the explosive death of a massive star?
• What must occur when a chemical change takes place in terms of substances?
• What device is used to measure temperature?
• What is a defining characteristic of ionic bonds?
• What do we call a group of stars that form recognizable patterns in the night sky?
• What phenomenon occurs when an external electric field causes a redistribution of charge?
• Which method involves using natural predators to control pest populations?
• What is the role of chlorophyll in photosynthesis?
• What unit is electric current measured in?
• Which of the following occurs due to the gravitational pull of the Moon?
• What is an ecosystem?
• What term describes an organism's ability to maintain stable conditions in its body?
• Which statement correctly defines the difference between mass and weight?
• What term describes the non-living components that affect ecosystems?
• What is the role of mitochondria in cells?
• Which of the following is not a characteristic of red giants?
• Which particles in an atomic nucleus bear a positive charge?
• Which planets are classified as terrestrial planets?
• What is the primary composition of the Sun?
• Which type of change affects only the form of a substance and not its chemical composition?
• What do we call a community of living organisms and their physical environment?
• How is a biome defined?
• Which of the following describes an effect of microgravity on astronauts?
• What type of star is Betelgeuse?
• Which relationship features one organism benefiting with no effect on the other?
• What happens to the resistance in a circuit if the length of the conductor increases?
• What term refers to the periodic rise and fall of sea levels?
• Which visible feature on the Sun’s surface extends outward and is known for being large and bright?
• What type of organism can break down dead organic matter?
• How is an atom defined?
• In an electrical circuit, what is the component that consumes electrical energy called?
• What is the pH scale used for?
• What is the approximate distance that light travels in one year?
• What is a characteristic of metals that distinguishes them from non-metals?
• What are large stars in late life stages called?
• Which property of a substance can be observed without altering its chemical identity?
• What device is used to detect the presence of an electric charge?
• What defines an object that has equal numbers of protons and electrons?
• Which term best describes organisms that can make their own food?
• Which of the following statements about DNA is true?
• What type of species can threaten local habitats by outcompeting native species?
• Which of the following factors affects the resistance of a conductor?
• What is the greenhouse effect?
• What is the study of how populations change over time called?
• Which type of bond involves the transfer of electrons between atoms?
• What is primarily responsible for changes in climate due to Earth's axial tilt?
• What type of bond is formed when electrons are shared between atoms?
• Which formula can be used for cost calculation related to electrical power?
• What are the main components of the Earth's atmosphere?
• Which of the following is NOT a characteristic of non-metals?
• What best describes the physical state of metals at room temperature?
• What is formed when two or more elements chemically combine?
• What type of bonding is characterized by the sharing of electrons between atoms?
• What does the term biodiversity refer to?
• What is the second brightest star in the night sky known for its companion star Sirius B?
• What type of celestial object is typically composed of ice, dust, and gas, and develops a tail when near the Sun?
• In which type of circuit is the same voltage applied across all components?
• What term refers to non-native species that disrupt local ecosystems?
• What effect does temperature generally have on resistance of a conductor?
• What is homeostasis?
• Which object is known for its intense gravitational pull and can arise from the remnants of massive stars?
• Which of the following are the three types of rocks?
• What are small, dense remnants of low-mass stars known as?
• In which type of symbiotic relationship do both species benefit?
• What type of star is the Sun classified as?
• What term describes materials that can easily gain or lose electric charge?
• Which of the following best describes an independent variable in an experiment?
• Which part of the brain is responsible for controlling voluntary movements?
• What phenomenon refers to the loss of bone mass experienced by astronauts in space?
• Name one biotic factor that affects an ecosystem.
• What term refers to the global sum of all ecosystems?
• What diagram illustrates the flow of energy through different trophic levels?
• What is the primary function of the circulatory system?
• How is energy transferred in a food chain?
• Which of the following structures is considered a basic unit of structure in living organisms?
• What is the term for the total mass of living matter in a given area?
• What diagram provides a visual representation of an atom's structure, including its protons, neutrons, and electrons?
• Which of the following is NOT a characteristic of living organisms?
• What are the building blocks of proteins?
• What is a meteoroid that has entered Earth’s atmosphere and produces a bright streak of light called?
• What is the term for a relationship where one organism benefits while the other is harmed?
• In a chemical reaction, what are reactants?
• What role do producers play in an ecosystem?
• What is the term for a celestial body that orbits a planet?
• What are the two main types of cells?
• What is the study of fungi called?
• What is a sudden eruption of energy on the Sun's surface known as?
• What is the name of the region in space located between Mars and Jupiter that contains numerous asteroids?
• What is the main characteristic of a neutron star?
• What are the letters that represent a chemical element called?
• What do you call atoms of the same element that have different numbers of neutrons?
• How do you calculate the density of an object?
• What defines a region that has a gravitational pull so strong that nothing can escape from it?
• What method involves using chemicals to manage pest populations?
• Which diagram relates star luminosity to temperature?
• What is the linear sequence of energy transfer in ecosystems called?
• What are the three states of matter?
• In a food web, which organisms would you expect to have the highest biomass?
• What are the particles found surrounding the nucleus of an atom?
• What is the term for the ranking of materials based on their tendency to gain a charge?
• Which of the following does NOT represent a physical change?
• What is the primary function of the respiratory system?
• Which star is known as a bright star in the Lyra constellation?
• Which of the following best describes electrical energy?
• What phenomenon occurs when the Moon obscures the Sun from Earth's view?
• Which law states that like charges repel and opposite charges attract?
• Which of the following is not a state of matter?
• What do we call a small rocky or metallic body that orbits the Sun?
• Which of the following is a property of gas giants?
• Which process is responsible for converting glucose into energy?
• What are temporary dark spots on the Sun's surface called?
• What is the process called when water vapor turns into liquid water?
• What term describes the struggle between organisms for limited resources?
• What do we call the event when Earth blocks sunlight from reaching the Moon?
• What term describes the relationship where one organism preys on another for food?
• What is a solution?
• Which of the following is an indicator of a chemical change?
• Which type of particle is found in the atomic nucleus and has no charge?
• What is the primary role of decomposers in an ecosystem?
• What is the main role of producers in an ecosystem?
• Which law states that energy cannot be created or destroyed?
• What is Earth's solid outer layer, which includes rocks, called?
• What is a hypothesis?
• Which property is only observable at a molecular level?
• What role do enzymes play in biological reactions?
• What is the core of the Hertzsprung-Russell Diagram used for?
• What term describes the different appearances of the Moon as it cycles through its phases?
• What is the primary process through which plants obtain energy?
• What is the chemical equation for photosynthesis?
• Which of the following is an example of a chemical change?
• Which process allows plants to produce their own food?
• What process converts light energy into chemical energy?
• Evidence of gas production during a reaction typically indicates what kind of change?
• What type of energy transformation occurs during photosynthesis?
• What term refers to the number of protons in an atom's nucleus?
• Which part of the plant is primarily responsible for photosynthesis?
• What is the main component of cell membranes?
• What is a producer in an ecosystem?
• What term describes a characteristic that indicates a substance's potential to undergo a chemical change?
• What is an example of a physical change?
• What device regulates the flow of electricity in a circuit?
• What term describes a change in the DNA sequence?
• Which process do plants utilize to produce food in the presence of sunlight?
• Which of the following best describes a dependent variable in an experiment?
• If a circuit has a voltage of 10 volts and a resistance of 2 ohms, what is the current?
• What unit is resistance measured in?
• What defines a physical property of matter?
• What do we call an animal that mainly eats plants?
• What is Sirius B classified as?
• When resistance increases in a circuit, what typically happens to the current if the voltage remains constant?
• Which type of electricity changes direction periodically?
• What type of electrical current only flows in one direction?
• What is the common physical state of non-metals at room temperature?
• Electric current is measured in which unit?
• What is matter?
• Which gas is a byproduct of photosynthesis?
• What is the total number of protons and neutrons in an atom called?
• What distinguishes renewable resources from non-renewable resources?
• What is the role of chlorophyll in photosynthesis?
• Which of the following encompasses all water bodies on Earth?
• What process do plants use to convert sunlight into chemical energy?
• Which term describes a substance that cannot be chemically broken down?
• What is the primary source of energy for Earth?
• What type of celestial object becomes visible with a tail when it approaches the Sun?
• What type of batteries are designed to be recharged after use?
• What is the role of DNA in living organisms?
• Which type of star is characterized by high temperatures and luminosity?
• What is the primary function of the digestive system?
• Which term describes a massive star that has ended nuclear fusion at its core?
• Define a virus.
• Which type of animal primarily consumes other animals?
• What is the purpose of a fuse in an electrical circuit?
• What is the role of decomposers in an ecosystem?
• Which process converts sunlight into chemical energy in plants?
• What is the relationship between the Earth’s axial tilt and seasonal changes?
• Which of the following is NOT a method of producing electric charge?
• What is the unit for potential difference?
• Which of these elements would most likely be a metalloid?
• What is the difference between an element and a compound?
• What factor in an ecosystem may include temperature, sunlight, and water levels?
• Which term is used to describe a recognized pattern of stars?
• What is the primary function of roots in plants?
• What unit is used to measure electrical resistance?
• Which term describes a celestial body that does not clear its orbit?
• How can the scientific method be best described?
• What distinguishes metalloids from metals and non-metals?
• What is the primary effect of increasing the length of a conductor on its resistance?
• What defines a solar eclipse?
• What is the result of a chemical change?