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Skills available for Oklahoma seventh-grade science standards

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PS1 Matter and Its Interactions

PS3 Energy

LS1 From Molecules to Organisms: Structure and Function

  • 7.LS1.6 Construct a scientific explanation based on evidence for the role of photosynthesis in the cycling of matter and flow of energy into and out of organisms.

    • 7.LS1.6.1 Plants, algae (including phytoplankton), and many microorganisms use the energy from light to make sugars (food) from carbon dioxide from the atmosphere and water through the process of photosynthesis, which also releases oxygen. These sugars can be used immediately or stored for growth or later use.

    • 7.LS1.6.2 The chemical reaction by which plants produce complex food molecules (sugars) requires an energy input (i.e., from sunlight) to occur.

    • 7.LS1.6.3 In this reaction, carbon dioxide and water combine to form carbon-based organic molecules and release oxygen.

  • 7.LS1.7 Develop a model to describe how food molecules in plants and animals are broken down and rearranged through chemical reactions to form new molecules that support growth and/or release energy as matter moves through an organism.

LS2 Ecosystems: Interactions, Energy, and Dynamics

  • 7.LS2.1 Analyze and interpret data to provide evidence for the effects of resource availability on organisms and populations of organisms in an ecosystem.

    • 7.LS2.1.1 Organisms, and populations of organisms, are dependent on their environmental interactions both with other living things and with nonliving factors.

    • 7.LS2.1.2 In any ecosystem, organisms and populations with similar requirements for food, water, oxygen, or other resources may compete with each other for limited resources, access to which consequently constrains their growth and reproduction.

    • 7.LS2.1.3 Growth of organisms and population increases are limited by access to resources.

  • 7.LS2.2 Construct an explanation that predicts patterns of interactions among organisms across multiple ecosystems.

  • 7.LS2.3 Develop a model to describe the cycling of matter and flow of energy among living and nonliving parts of an ecosystem.

    • 7.LS2.3.1 Food webs are models that demonstrate how matter and energy is transferred between producers, consumers, and decomposers as the three groups interact within an ecosystem.

    • 7.LS2.3.2 Transfers of matter into and out of the physical environment occur at every level.

    • 7.LS2.3.3 Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments.

    • 7.LS2.3.4 The atoms that make up the organisms in an ecosystem are cycled repeatedly between the living and nonliving parts of the ecosystem.

  • 7.LS2.4 Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.

  • 7.LS2.5 Evaluate competing design solutions for maintaining biodiversity and ecosystem services.

    • 7.LS2.5.1 Biodiversity describes the variety of species found in Earth's terrestrial and oceanic ecosystems.

    • 7.LS2.5.2 The completeness or integrity of an ecosystem's biodiversity is often used as a measure of its health.

    • 7.LS2.5.3 Changes in biodiversity can influence humans' resources, such as food, energy, and medicines, as well as ecosystem services that humans rely on—for example, water purification and recycling.

    • 7.LS2.5.4 There are systematic processes for evaluating solutions with respect to how well they meet the criteria and constraints of a problem.

ESS3 Earth and Human Activity