#### SCI-HS.PS2.02

High School (SCI) Physical Science Standards
[PS2] Motion and Stability: Forces and Interactions

##### SCI-HS.PS2.02 Use mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system.

Clarification Statement:
Physical Science: Emphasis is on the quantitative calculations of momentum and the qualitative meaning of conservation of momentum.
Physics: Emphasis is on the quantitative calculations of momentum and the qualitative meaning of conservation of momentum. Physics includes the quantitative calculations of conservation of momentum, including inelastic & elastic collisions

Disciplinary Core Ideas
PS2.A: Forces and Motion Momentum is defined for a particular frame of reference; it is the mass times the velocity of the object. If a system interacts with objects outside itself, the total momentum of the system can change; however, any such change is balanced by changes in the momentum of objects outside the system.

## Student Learning Targets:

• I can

• I can

• I can

### Product Targets

• I can

Student "I can" statements are embedded within the proficiency scale.

## Proficiency Scale (Physical Science)

 Score Description Sample Activity 4.0 In addition to Score 3.0, the student demonstrates in-depth inferences and applications regarding more complex material that go beyond end of instruction expectations. Themselves as an individual (myself, my family, my friends) Our society (environment, economy, infrastructure) Our culture (beliefs, norms, people) Our species (mankind, global, environment) - 3.5 In addition to Score 3.0 performance, the student demonstrates in-depth inferences and applications regarding the more complex content with partial success. 3.0 “The Standard.” The student demonstrates no major errors or omissions regarding any of the information and processes that were end of instruction expectations. The student will be able to (Force): Recognize that all moving objects have momentum. Calculate force, mass and acceleration by using Newton’s 2nd Law of Motion.       Identify force pairs and be able to explain the classic “tug-o-war” Compare free-fall acceleration of an object with and without air resistance   The student will be able to (Work and Energy): Calculate the work done on an object and the rate at which work is done       Calculate the MA of various machines      Calculate KE and GPE Distinguish between mechanical and non-mechanical energy Explain the Law of conservation of energy      Analyze the efficiency of machines Define work and power Name and describe the six types of simple machines       Define potential energy and kinetic energy Identify examples of energy transformations - 2.5 The student demonstrates no major errors or omissions regarding the simpler details and processes (Score 2.0 content) and partial knowledge of the more complex ideas and processes (Score 3.0 content). 2.0 The student demonstrates no major errors or omissions regarding the simpler details and processes but exhibits major errors or omissions regarding the more complex ideas and processes (Score 3.0 content). The student will be able to define (Force):   Free fall , Friction , g, Inertia, Mass, Momentum, Newton, Projectile motion, Terminal velocity, Weight The student will be able to define (Work and Energy): Compound machine, Energy, Fulcrum, Mechanical advantage, Power, Watt However, the student exhibits major errors or omissions regarding the more complex ideas and processes. - 1.5 The student demonstrates partial knowledge of the simpler details and processes (Score 2.0 content) but exhibits major errors or omissions regarding the more complex ideas and procedures (Score 3.0 content). 1.0 With help, the student demonstrates a partial understanding of some of the simpler details and processes (Score 2.0 content) and some of the more complex ideas and processes (Score 3.0 content). - 0.5 With help, the student demonstrates a partial understanding of some of the simpler details and processes (Score 2.0 content) but not the more complex ideas and processes (Score 3.0 content). 0.0 Even with help, the student demonstrates no understanding or skill. -

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