1. What is matter? 2. What are the 3 states of matter? 3. Give one example each of an element, a compound, and a mixture. You will have about 5 minutes.

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Presentation transcript:

1. What is matter? 2. What are the 3 states of matter? 3. Give one example each of an element, a compound, and a mixture. You will have about 5 minutes to do most warmups. You do not have to write the questions (or any powerpoint notes, actually) unless they are in black or they are too difficult to answer You may use notes or your textbook on warmups, and may work or compare answers or work with a partner. You may not get up. Sometimes warmups are collected, so do them on paper that you won’t mind turning in ;)

is anything with mass and volume that takes up space and is made of ATOMS

Matter can be found as: ELEMENT  a pure substance made of ONE kind of atom. COMPOUND  substance made from the atoms of 2 or more different elements that are stuck together (bonded). MIXTURE- a substance that has a variable composition

Matter Pure Substance (can write chemical formula) Compounds (2 or more different, bonded atoms) Elements (one type of atom) Mixture (variable ratio) Heterogeneous (not uniform) Homogeneous (uniform) (solutions)

Classify each example. If it is a substance, write ELEMENT or COMPOUND. If it is a mixture, write HETEROGENEOUS or HOMOGENEOUS in the mixture column.

SOLIDLIQUIDGAS Keeps its shape.Does NOT keep its shape (takes shape of container). Can NOT be compressed (keeps same volume) Can NOT be compressed (keeps the same volume) Can be compressed to fit a smaller volume. Particles are relatively fixed.Particles are close but can flow past each other. Particles have a ton of energy and fly apart.

1. Physical Properties Can be changed without changing the identity of the substance.  color, density, size, boiling point, state 2. Chemical Properties If these characteristics change, the substance will change from one kind to another  flammability, reactivity, rust ability

Physical Changes:  cutting, melting, boiling, grinding, freezing, evaporating, condensing  The matter remains the same as the size, shape, or appearance changes.  Substance may require energy or release energy to undergo a phase change  H 2 0 (l)  H 2 0 (g)

Chemical Changes  fireworks exploding, matches burning, eggs rotting, bike rusting.  The matter changes to form a new substance that was not there before.  Four clues that a new substance has formed: 1. gas is produced 2. a new color is made 3. heat & light is given off 4. precipitate formed.