whatsa matter? do now modern chemistry is defined as the study of matter. what do you think matter...
TRANSCRIPT
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
