Standards Map

Science and Technology/Engineering > Grade 3 > Physical Science
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Science and Technology/Engineering | Grade : 3

Discipline - Physical Science

Core Idea - Motion and Stability: Forces and Interactions

[3.PS.2.1] - Provide evidence to explain the effect of multiple forces, including friction, on an object. Include balanced forces that do not change the motion of the object and unbalanced forces that do change the motion of the object. Clarification Statements: Descriptions of force magnitude should be qualitative and relative; Force due to gravity is appropriate but only as a force that pulls objects down; State Assessment Boundaries: Quantitative force magnitude is not expected in state assessment; State assessment will be limited to one variable at a time: number, size, or direction of forces.

Resources:

Predecessor Standards:

  • 2.NBT.A.4
    Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
  • K.PS.2.1
    Compare the effects of different strengths or different directions of pushes and pulls on the motion of an object. Clarification Statements: Examples of pushes or pulls could include a string attached to an object being pulled, a person pushing an object, a person stopping a rolling ball, and two objects colliding and pushing on each other; Comparisons should be on different relative strengths or different directions, not both at the same time;Non-contact pushes or pulls such as those produced by magnets are not expected.
  • 2.PS.3.1
    Design and conduct an experiment to show the effects of friction on the relative temperature and speed of objects that rub against each other. Clarification Statements: Examples could include an object sliding on rough vs. smooth surfaces; Observations of temperature and speed should be qualitative.

Successor Standards:

  • 4.PS.3.3
    Ask questions and predict outcomes about the changes in energy that occur when objects collide. Clarification Statement: Changes in energy can include a change in the object’s motion, position, and the generation of heat and/or sound. State Assessment Boundary: Analysis of forces or quantitative measurements of energy are not expected in state assessment.
  • 5.PS.2.1
    Support an argument with evidence that the gravitational force exerted by Earth on objects is directed toward Earth’s center. State Assessment Boundary: Mathematical representations of gravitational force are not expected in state assessment.
  • 8.PS.2.2
    Provide evidence that the change in an object’s speed depends on the sum of the forces on the object (the net force) and the mass of the object. Clarification Statement: Emphasis is on balanced (Newton’s first law) and unbalanced forces in a system, qualitative comparisons of forces, mass, and changes in speed (Newton’s second law) in one dimension. State Assessment Boundaries: State assessment will be limited to forces and changes in motion in one dimension in an inertial reference frame and to change in one variable at a time. The use of trigonometry is not expected in state assessment.

Same Level Standards:

  • RI.3.3
    Describe the relationship between a series of historical events, scientific ideas or concepts, mathematical ideas or concepts, or steps in technical procedures in a text, using language that pertains to time, sequence, and cause/effect.
  • W.3.2
    Write informative/explanatory texts to examine a topic and convey ideas and information clearly.