Are mass and matter the same thing? Explain.

Unit 5: Sum of Parts EQ: What is mass and how do we determine the mass of an object? EQ: What is the difference between weight and mass? EQ: Does the mass of an object always equal the sum of its parts? Students will verify that an object is the sum of its parts- Demonstrate that the mass of an object is equal to the sum of its parts by manipulating and measuring different objects made of various parts.

Matter and Mass Mass describes how heavy something is. Matter is a word that describes anything that has mass and takes up space. A chair is matter. A pencil is matter. A hair and a speck of dust are also matter, even though they have very little mass and take up very little space. Here is something interesting though: each of these things is made up of other things. Think about the chair for a minute. Inside of a chair is a wooden frame, held together by metal nails, covered with cloth and stuffed with some kind of batting (either natural cotton or man-made polyester). It probably has a seat cushion made of foam also. The wood, the nails, the cloth, the pillows, and the stuffing are all matter, too. They have mass and they take up space. Each of them has its own properties. Properties are the things that describe an object.

Properties of Matter Property Some choices Color Yellow, purple, brown Odor Fishy, flowery, smoky Texture Rough, smooth, slippery The properties above can be described using words. They are qualitative descriptions. Other properties are defined by numbers. They can be measured. You can say that using the number quantifies the property: it is a quantitative description. Whenever a property is described by a number, it also has a unit. Metric units are used in science. More properties and their units are given in their units are given in the table to the right. Property Unit Length Meter (m) Mass Gram (g) Temperature Degrees Celsius (°C) or Kelvin (K)

The mass of the an object is exactly equal to the mass of the things that make up the object. In fact, the mass of any piece of matter is equal to the combined mass of all the things that it contains. This is called the Law of Conservation of Matter. It states that the matter cannot be created or destroyed, though it can be rearranged. Follow-up with a practice activity

Experiment The teacher will demonstrate getting the mass of an object.