SC15.8.8

Science (2015) Grade(s): 8

SC15.8.8

Use Newton’s first law to demonstrate and explain that an object is either at rest or moves at a constant velocity unless acted upon by an external force (e.g., model car on a table remaining at rest until pushed).

Unpacked Content

Scientific and Engineering Practices

Constructing Explanations and Designing Solutions

Crosscutting Concepts

Cause and Effect

Knowledge

Students know:
  • An object at rest remains at rest unless acted on by an external force.
  • An object in motion remains in motion unless acted upon by an external force.
  • Inertia is the tendency of an object to resist a change in motion.
  • An object subjected to balanced forces does not change its motion.
  • An object subjected to unbalanced forces changes its motion over time.
  • Constant velocity indicates that an object is moving in a straight line at a constant speed.

Skills

Students are able to:
  • Demonstrate Newton's first law.
  • Articulate a statement that relates a given phenomenon to a scientific idea, including Newton's first law and the motion of an object.

Understanding

Students understand that:
  • Newton's First Law states that an object at rest remains at rest unless acted upon by an external force.
  • Newton's First Law states that an object at in motion remains in motion at a constant velocity unless acted upon by an external force.

Vocabulary

  • Sir Isaac Newton
  • Newton's First Law of Motion
  • Constant velocity
  • Balanced force
  • Unbalanced force
  • External force
  • Rest
  • Motion
  • Inertia
ALSDE LOGO