Chapter 1 Matter, Measurements, &

Calculations1.1 What Is Matter?

Copyright © 2005 by Pearson Education, Inc.Publishing as Benjamin Cummings

Matter

Matter is the “stuff” that makes up all things and is too small to be seen with the human eye.

Copyright © 2005 by Pearson Education, Inc.Publishing as Benjamin Cummings

Anything that has mass and occupies space is matter.

Mass is a measurement of the amount of matter in an object. Ex. A bowling ball vs. a basket ball

Weight is a measurement of the gravitational force acting on an object.Ex. Dropping a bowling ball vs. a feather

Mass vs. Weight

Pile of unorganized Legos

Credit: Courtesy of Julie Millard

Molecules, like these Legos, can be combined in different ways

Credit: Courtesy of Julie Millard

Molecules, like these Legos, can be combined in different ways

Credit: Courtesy of Julie Millard

Chemical compounds are pure substances made of atoms of different elements combined in a definite, fixed ratios.Ex. Water will have the same property no matter where it comes from.

A molecule is the smallest chemical unit of a compound that retains the composition and properties of the compound and can exist independently. Ex. 2H’s and 1O