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Skills available for Oklahoma third-grade science standards

Standards are in black and IXL science skills are in dark green. Hold your mouse over the name of a skill to view a sample question. Click on the name of a skill to practice that skill.

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PS2 Motion and Stability: Forces and Interactions

  • 3.PS2.1 Plan and conduct investigations on the effects of balanced and unbalanced forces on the motion of an object.

    • 3.PS2.1.1 Each force acts on one particular object and has both strength and a direction. An object at rest typically has multiple forces acting on it, but they add to give zero net force on the object. Forces that do not sum to zero can cause changes in the object's speed or direction of motion. (Boundary: Qualitative and conceptual, but quantitative addition of forces is not used at this level.)

    • 3.PS2.1.2 Objects in contact exert forces on each other.

  • 3.PS2.2 Make observations and/or measurements of an object's motion to provide evidence that a pattern can be used to predict future motion.

    • 3.PS2.2.1 The patterns of an object's motion in various situations can be observed and measured; when that past motion exhibits a regular pattern, future motion can be predicted from it. (Boundary: Technical terms, such as magnitude, velocity, momentum, and vector quantity are not introduced at this level, but the concept that some quantities need both size and direction to be described is developed)

  • 3.PS2.3 Ask questions to determine cause and effect relationships of electric or magnetic interactions between two objects not in contact with each other.

  • 3.PS2.4 Define a simple design problem that can be solved by applying scientific ideas about magnets.

    • 3.PS2.4.1 Electric and magnetic forces between a pair of objects do not require that the objects be in contact. The sizes of the forces in each situation depend on the properties of the objects and their distances apart and, for forces between two magnets, on their orientation relative to each other.

    • 3.PS2.4.2 Scientific discoveries about the natural world can often lead to new and improved technologies, which are developed through the engineering design process.

LS1 From Molecules to Organisms: Structure and Function

LS2 Ecosystems: Interactions, Energy and Dynamics

LS3 Heredity: Inheritance and Variation of Traits

LS4 Biological Unity and Diversity

  • 3.LS4.1 Analyze and interpret data from fossils to provide evidence of the organisms and the environments in which they lived long ago.

  • 3.LS4.2 Use evidence to construct an explanation for how the variations in characteristics among individuals of the same species may provide advantages in surviving and reproducing.

  • 3.LS4.3 Construct an argument with evidence that in a particular habitat some organisms can survive well, some survive less well, and some cannot survive at all.

    • 3.LS4.3.1 For any particular environment, some kinds of organisms survive well, some survive less well, and some cannot survive at all.

    • 3.LS4.3.2 Changes in an organism's habitat are sometimes beneficial to it and sometimes harmful.

  • 3.LS4.4 Make a claim about the merit of a solution to a problem caused when the environment changes and the types of plants and animals that live there may change.

    • 3.LS4.4.1 When the environment changes in ways that affect a place's physical characteristics, temperature, or availability of resources, some organisms survive and reproduce, others move to new locations, yet others move into the transformed environment, and some die.

    • 3.LS4.4.2 Populations live in a variety of habitats, and change in those habitats affects the organisms living there.

ESS2 Earth's Systems

ESS3 Earth and Human Activity