9/29/11 I -STARTER: Warm up Tape in Your Warm up and Complet e Justify Your Answer Choice:

9/29/11 Tape in Your Warm up and Complet e Justify Your Answer Choice: I -STARTER: Warm up II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.

Elements are all around us … can you recognize them when you see them?

 An element is a pure substance that cannot be broken down by chemical means into other substances.  A compound contains two or more elements.  Everything is made up of elements.

 Used in:  wiring  heat sinks  Coins  brass and bronze alloys (metal mixtures).

 Lincoln Memorial penny  dated before made of 95% copper.  dated after made of 97.5% zinc and plated with a thin copper coating.

 classified as an element in  The Nickel (five- cent) coin – made of 75% copper.  Only 25% is nickel, It actually has more copper than the penny!

 Colorless gas  glows pale peach when an electric current runs through it  Used to make balloons float

 Malleable  shaped into interesting, beautiful and useful objects, like soda cans.

 A diamond, but heat it too much and it burns up into carbon dioxide gas.  Graphite used in pencils  Coal

 most people think of chalk and bones  Actually…a silvery metal that reacts with water to give off hydrogen gas

 Meteorite (from ancient Mexico - made mostly of iron.  Locals created tools from  first samples made their way out to the world in the 1700s

 gives off violet vapor when heated  used as disinfectants for cuts and wounds before antiseptic agents were found.

 Usually seen as Lead pipes

 All of these elements are found within the Earth, atmosphere, oceans and even in your all living things.

 computer chips

 78% of the atmosphere

 75% universe is hydrogen, a colorless gas.  The Sun is composed of Hydrogen & Helium

 purifies drinking water and swimming pools.  Combined with sodium, makes table salt

 Used in matches

 Has a very distinguishable smell

 exposed to water - explode in flaming balls of molten sodium.  Mix with Chlorine - creates table salt.

 Colorless gas  Blue liquid

9/29/11 Tape in Your Warm up and Complet e Justify Your Answer Choice: I -STARTER: Warm up II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements. III- APPLICATION Explain how the physical properties of an element determine how we use that element

9/29/11 Tape in Your Warm up and Complet e Justify Your Answer Choice: I -STARTER: Warm up II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements. III- APPLICATION Explain how the physical properties of an element determine how we use that element IV –CONNECTIONS: Knowing what you have learned about metals, nonmetals, and elements explain: Why do jewelers use metals instead of nonmetals to make jewelry?

9/29/11 Tape in Your Warm up and Complet e Justify Your Answer Choice: I -STARTER: Warm up II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements. III- APPLICATION Explain how the physical properties of an element determine how we use that element IV –CONNECTIONS: Knowing what you have learned about metals, nonmetals, and elements explain: Why do jewelers use metals instead of nonmetals to make jewelry? V -EXIT: Writing 3-4 sentences summarizing what we have learned so far about elements