Introduction

The first grade science curriculum of the Philadelphia School District contains a unit on how things move. In this unit, students will know and observe:

· Balls are alike in some ways and different in others.

· Balls can move in different ways.

· Bouncing is one of the ways that balls can move.

· Balls will fall to the earth or roll down to the earth (on an incline) unless something holds them up due to gravity.

· The steepness of a ramp will affect how far a ball rolls and how much “push” or force called momentum it has at the bottom of the ramp.

· The position and motion of objects can be changed by pushing or pulling.

• Changing the surface on which something moves can make it easier or harder for the objects to move due to friction, a force that acts when two surfaces rub against each other.

Introduction	School Activities
Franklin Institute Activities	Chaperone Instructions
Assessment and Reflections