MS-PS2-1

SCUSD NGSS Curriculum Guide
 * MS-PS2-1: Apply Newton’s Third Law to design a solution to a problem involving the motion of two colliding objects.* ** [Clarification Statement: Examples of practical problems could include the impact of collisions between two cars, between a car and stationary objects, and between a meteor and a space vehicle.] [//Assessment Boundary: Assessment is limited to vertical or horizontal interactions in one dimension.//]

Science Background for the Teacher:
Newton's 3rd law. For every force there is an equal and opposite force on the other object. Forces always come in pairs.

Key Vocabulary:

 * collision ||  || [key vocab term for this performance expectation] || [key vocab term for this performance expectation] ||

Possible Assessments (formative and/or summative):
Students have a successful design of a device that safely lands an egg on the ground. They are also able to explain why their device worked. Draw a model of how their device works, label forces.

Key Student Activity:
Students have to perform a sales pitch that describes how their egg drop will work. This require students to preplan, and have a diagram model of how their device will work. explain the science behind it using newton's third law.

Students design and construct a device that can safely land a raw egg that is dropped from a high point. Materials are items brought from their home. Students will work in pairs/groups to design a device and think about materials they have at home that can safely land an egg.

Key Teacher Demo/Activity:
Demo: Drop egg with no device and talk about the forces that affect the egg. Video: Show a clip of how the rovers on Mars were safely landed on the planet without being damaged. (Clip from video "Expanding Universe - Planets")

Common Student Misconceptions:
Misconception: Balanced forces on an object are from newton's 3rd law. Reality: Equal and opposite forces are always on different objects.

Things to Avoid/Correct:
Stay focused on the actual 3rd law.

====Other Resources (text, video, simulations, activities, models, etc..): ====

[Descriptions or links to other resources that would support student understanding of this topic or mastery of this performance expectation.]