In this lesson, we are going to introduce the student to the idea of scale of the universe we are living in. There are four take home points that we want to cover: 1. Models can help up compare characteristics of planets; 2. Planets have measurable properties, such as size, mass, composition etc. 3. Density cannot be determined by its size alone; 4. Things in the Solar System (and Universe) are really far apart. To explore the topic, we will divide the lesson into four parts: 1. Warm-up discussions: in this part, we will first have a Scavenger Hunt and some warm-up questions discussed; 2. Pocket Solar System: In this part, we will build our own model of the solar system and have a discussion over it; 3. Composistion: In this part, we will discuss what the colors mean on a map, then mark the planets with colors indicating what its made of; 4. Size/Density Demo: In this part, we will discuss the relation between sizes and Densities.
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