K-PS2-1

SCUSD NGSS Curriculum Guide
 * K-PS2-1: Plan and conduct an investigation to compare the effects of different strengths or different #|directions of pushes and pulls on the motion of an object. ** [Clarification Statement: 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.] [//Assessment] Boundary: Assessment is limited to different relative strengths or different [directions], but not both at the same time. Assessment does not include non-contact pushes or pulls such as those produced by magnets.//]

====Science Background for the Teacher: Pushing or pulling on an object can change the speed or direction of its motion and can start or stop it. An object sliding on a surface or sitting on a slope experiences a resistance due to friction on the object depending on the surface it is in contact with. ====

Key Vocabulary:
slope force pull push magnets motion surface touching/not touching spin roll ramp velocity

Possible Assessments (formative and/or summative):
Can they draw a picture and label key vocabulary of how we make objects move. (Draw two kids on a playground playing ball, rolling down ramps)

Key Student Activity:
Students roll objects down a ramp. Use different objects: ball, rectangular prism, #|cylinder, Change the level of the ramp. FOSS Grade 2. Investigation 4, rollers. FOSS Grade 2. Investigation 6, Magnets and Tools.

Key Teacher Demo/Activity:
Roll a ball on the carpet, in front of the students. Then roll the same ball on a ramp.

Things to Avoid/Correct:
Objects don't stop on their own.

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

Use a skate board to demonstrate rolling