An electric current can produce a magnetic field and that a changing magnetic field can produce an electric current
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United States Video Lessons
Grade 9 Science Video Lessons
Watch 54 dedicated curriculum video lessons.
Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration
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Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which a reaction occurs
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Changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay
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Communicate scientific and technical information about why the molecular-level structure is important in the functioning of designed materials
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Convert one form of energy into another form of energy
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Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy
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Evaluate the claims, evidence, and reasoning behind the idea that electromagnetic radiation can be described either by a wave model or a particle model, and that for some situations one model is more useful than the other
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Evaluate the validity and reliability of claims in published materials of the effects that different frequencies of electromagnetic radiation have when absorbed by matter
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Increased amounts of products at equilibrium
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Relative properties of elements based on the patterns of electrons in the outermost energy level of atoms
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Structure of substances at the bulk scale to infer the strength of electrical forces between particles
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Two objects interacting through electric or magnetic fields to illustrate the forces between objects and the changes in energy of the objects due to the interaction
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A solution to mitigate adverse impacts of human activity on biodiversity
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Apply concepts of statistics and probability to support explanations that organisms with an advantageous heritable trait tend to increase in proportion to organisms lacking this trait
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Ask questions to clarify relationships about the role of DNA and chromosomes in coding the instructions for characteristic traits passed from parents to offspring
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Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence
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Construct an explanation based on evidence for how natural selection leads to adaptation of populations
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Construct an explanation based on evidence for how the structure of DNA determines the structure of proteins which carry out the essential functions of life through systems of specialized cells
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Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment
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Construct and revise an explanation based on evidence for how carbon, hydrogen, and oxygen from sugar molecules may combine with other elements to form amino acids and/or other large carbon-based molecules
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Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions
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Develop a model to illustrate the role of photosynthesis and cellular respiration in the cycling of carbon among the biosphere, atmosphere, hydrosphere, and geosphere
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Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms
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Factors affecting biodiversity and populations in ecosystems of different scales. HS-LS2-6. Evaluate the claims, evidence, and reasoning that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem
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Factors that affect carrying capacity of ecosystems at different scales
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Feedback mechanisms maintain homeostasis
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Make and defend a claim based on evidence that inheritable genetic variations may result from: (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/or (3) mutations caused by environmental factors
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Photosynthesis transforms light energy into stored chemical energy
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Reducing the impacts of human activities on the environment and biodiversity
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Role of cellular division (mitosis) and differentiation in producing and maintaining complex organisms
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Role of group behavior on individual and species’ chances to survive and reproduce
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Use mathematical representations to support claims for the cycling of matter and flow of energy among organisms in an ecosystem
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Analyze geoscience data to make the claim that one change to Earth’s surface can create feedbacks that cause changes to other Earth systems
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Construct an argument based on evidence about the simultaneous coevolution of Earth’s systems and life on Earth
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Construct an explanation based on evidence for how the availability of natural resources, occurrence of natural hazards, and changes in climate have influenced human activity
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Construct an explanation of the Big Bang theory based on astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe
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Create a computational simulation to illustrate the relationships among management of natural resources, the sustainability of human populations, and biodiversity
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Develop a model based on evidence of Earth’s interior to describe the cycling of matter by thermal convection
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Develop a model based on evidence to illustrate the life span of the sun and the role of nuclear fusion in the sun’s core to release energy that eventually reaches Earth in the form of radiation
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Develop a model to illustrate how Earth’s internal and surface processes operate at different spatial and temporal scales to form continental and ocean-floor features
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Develop a quantitative model to describe the cycling of carbon among the hydrosphere, atmosphere, geosphere, and biosphere
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Developing, managing, and utilizing energy and mineral resources based on cost-benefit ratios
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Evaluate evidence of the past and current movements of continental and oceanic crust and the theory of plate tectonics to explain the ages of crustal rocks
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Evaluate or refine a technological solution that reduces impacts of human activities on natural systems
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Motion of orbiting objects in the solar system
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Plan and conduct an investigation of the properties of water and its effects on Earth materials and surface processes
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Relationships among Earth systems and how those relationships are being modified due to human activity
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Variations in the flow of energy into and out of Earth’s systems result in changes in climate
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Way stars, over their life cycle, produce elements
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Breaking it down into smaller, more manageable problems that can be solved through engineering
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Evaluate a solution to a complex real-world problem based on prioritized criteria and trade-offs that account for a range of constraints, including cost, safety, reliability, and aesthetics, as well as possible social, cultural, and environmental impacts
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Specify qualitative and quantitative criteria and constraints for solutions that account for societal needs and wants
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Use a computer simulation to model the impact of proposed solutions to a complex real-world problem with numerous criteria and constraints on interactions within and between systems relevant to the problem
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