S&S Lesson 2: Learning Goals

Target Performances

Lesson 2 – Foundations: Powers of Ten and Investigation Tools (students developing foundational knowledge and practice)

Activity 2.1: Powers of Ten Video and Discussion (30 min)

Students discuss how all systems can be analyzed by “zooming in” and “zooming out” through a hierarchy of systems at different scales.

(Optional) Activity 2.2: From Big to Small (30 min)

Students organize images to “zoom in” and “zoom out” of six different systems at four different scales: atomic-molecular, microscopic, macroscopic, and large scales.

Activity 2.3: Zooming into Air (30 min)

Students describe air at atomic-molecular, microscopic, macroscopic, and large scales, identifying specific molecules in air.

Activity 2.4: Atoms and Molecules Quiz and Discussion (30 min)

Students apply the principle of matter conservation to atoms and molecules in different phenomena.

Activity 2.5: Using a Digital Balance and BTB (30 min)

Students (a) practice using two key tools for investigation—digital balances and BTB—with accuracy and precision and (b) describe how they can use these tools to detect matter movement and matter change.

NGSS Performance Expectations

Middle School

  • Structures and Properties of Matter. MS-PS1-1. Develop models to describe the atomic composition of simple molecules and extended structures.
  • Chemical Reactions. MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
  • Chemical Reactions. MS-PS1-5. Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.

High School

  • Chemical Reactions. HS-PS1-4. Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
  • Chemical Reactions. HS-PS1-7. Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.