Whatsa Matter? Do Now

Modern chemistry is defined as the study of matter.

•What do you think matter is?•Name 2 things that are matter and 2 things that are not matter.

What’s a Matter Worksheet

• Work together in groups of three to complete the “What’s a Matter” Worksheet.

• Come up with a group definition of “matter”

Some Textbook Definitions

• Matter is anything that has mass and volume.• Matter is anything of substance in the known

universe.• Matter is anything that takes up space.

So what about energy?

• Technically, energy is the “ability of a system to do work or supply heat”

• Comes is many forms: potential, kinetic, heat…• Informally, it is the movement of or effect of/on matterEX: Say you stand still and then you break into a

run…Has your matter changed??Has your energy changed??

Check-in

Which of the following can be classified as matter according to our definition?

• Beam of sunlight• Your breath• An automobile• Rain• An idea• Sadness

So what about FIRE?

• The ancient Greeks and alchemists thought it was an element.

• (They also considered earth, air, and water to be elements.)

• Fire is made up of many different substances, so it is not an element, fire is a mixture of hot gases.

• Flames are the result of a chemical reaction, primarily between oxygen in air and a fuel producing carbon dioxide, steam, light, and heat.

• If the flame is hot enough, the gases are ionized and become yet another state of matter: plasma.

What are the 4 states of matter?

•Solid•Liquid•Gas•Plasma

What the heck is plasma?

• closely related to gases • the particles are neither atoms nor molecules, but electrons

and positive ions. • Plasmas can be formed at very high temperatures• The resulting particles can then move freely, like the

particles in a gas. • found on Earth in the outermost atmosphere• probably more prevalent in the universe than all of the

other three states of matter. – The stars, comets' tails, and the aurora borealis are all plasmas.

• Because their particles are electrically charged, plasmas are greatly influenced by electric and magnetic fields.

Is that what’s in my “plasma” TV?

• A plasma display panel (PDP) • Many tiny cells between two panels of glass

hold a mixture of noble gases. The gas in the cells is electrically turned into a plasma which then excites phosphors to emit light. – Phosphors (not the element phosphorus) are

metallic compounds

Changing States of Matter