Matter • Objects that you can see and touch, all around you. • All living things, you • The air • Anything that has mass and takes up space • You are matter, your hair, nails, legs and eyes. (all of you) • The shoes you are wearing are matter • On your desk list 3 pieces of matter….
Matter = MASS • Anything that has mass and takes up space, “STUFF” • This is important in Chemistry because • Chemistry is the study ofmatter and the types of changes that matter undergoes, including energy changes. • Mass- the measure of the amount of matter. • Balance scale can determine mass. • kg is the standard unit of measurement. (metric)
Mass vs. Weight • They are closely related but not the same. • Mass describes the amount of matter an object has. • Weight describes how strongly gravity is pulling on that matter. Force of gravity on an object. • On your desk draw a picture of what you think weight would look like….
Volume • Refers to the amount of space an object or a substance takes up. • A bowling ball vs. a basket ball • Same size but different weight. The have approximately the same volume because they take up the same amount of space. Not the same weight.
Volume has a Formula • Volume= length X width X height • V = (l)(w)(h) • Lets try some sample problems…. • You can also measure volume by displacement, we will learn that later.
Matter is Divided Into 3 Categories • Solid • Liquid • Gas- has mass and take up space • With a shoulder partner think of some things that aren’t matter?
Matter Part 2 Subatomic Particles
Atoms(Particles) • Atoms: Tiny particles that make up all matter. • Basic building blocks of matter • Atoms are too small to see- even through a powerful microscope • Atoms are made up of Protons, Neutrons, and Electrons • Nucleus is what the center is called
Protons • Protons- • Have a positive charge (+) • They are in the nucleus- center of the atom • They have a mass of 1 amu amu- atomic mass unit
Neutrons • Neutrons- • Have no charge • Are located in the nucleus- center of the atom • They have a mass of 1 amu amu- atomic mass unit
Electrons • Electrons- • Have a negative charge (-) • Are located outside the nucleus in what is called an electron cloud. • Have a mass of 0 amu amu- atomic mass unit
Let’s listen to a song… https://www.youtube.com/watch?v=O5iaw5WNuB0
Take notes on Subatomic Particles…. https://www.youtube.com/watch?v=DstFt9JgLgg
More notes….then we should have it… https://www.youtube.com/watch?v=8woHGwWeSkY
Elements • 90 naturally occurring atoms, elements. • Scientist have been able to make up about 25 more. • There are more than 100 basic kinds of matter, called elements. • Common ones are iron, gold, and oxygen. • Each element has it’s own unique kind of atom. • Atoms from any element are all alike but different from the atoms of any other element.
Molecule • Particles • When two of more atoms stick together to form a larger particle. • A water molecule is made from • 2 atoms of hydrogen • 1 atom of oxygen
Why is this important? • Understanding atoms and molecules makes it possible to explain and predict • It explains why different materials have different characteristics • It will predict how a material will change when heated or cooled • It help us figure out how to combine atoms and molecules to make new and useful materials, plastic.