7th Grade Science Guide

7.1: Forces & Motion 3 Dimensions & Progressions

Unit 1

STANDARD 7.1.1 ● 7.1.1 C arry out an investigation which provides evidence that a change in an object’s motion is dependent on the mass of the object and the sum of the forces acting on it. Various experimental designs should be evaluated to determine how well the investigation measures an object’s motion . Emphasize conceptual understanding of Newton’s First and Second Laws. Calculations will only focus on one-dimensional movement; the use of vectors will be introduced in high school. (MS-PS2-2)

CONCEPTS

SKILLS

● Change in objects motion ● Mass of an object ● Forces acting on objects

● Investigate ● Provide evidence

LEARNING PROGRESSIONS

● Identify balanced and unbalanced forces ● Calculate the mass of an object ● Learn about different forces and how they act on objects ● Calculate forces acting on an object ● Determine independent and dependent variables ● Determine controls for experimental condition ● Determine number of trials for experimental condition ● Collect and analyze data about laws of motion

VOCABULARY ● Push ● Pull

● Weight ● Net Force ● Gravity ● Newton’s Law ● Inertia

● Momentum ● Velocity ● Acceleration ● Collision ● Mass

● Balance Force ● Unbalanced Force

● Speed ● Friction

POSSIBLE PHENOMENA ● When a measuring tape is pulled out of a tape measure and then released to rewind the tape measure recoils and spins on the tabletop. ● When the level of water in the canal is high, more water fows into the ditch than when the level of water in the canal is low. ● When a little child is skiing down a hill and collides with someone the collision causes less damage than when a big person collides with someone. ● The Hogle Zoo and Lagoon have a large rolling ball fountain. Observe what it takes to get it moving, keep it moving, and cause it to stop.