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Matter as a Black Box. Matter- anything that… Has mass (resists changes in motion) Has volume (takes up space) Energy- anything that… Changes matter (moves it) (Kinetic Energy) Stores up energy to move later (Potential energy). The Balloon Test.
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Matter as a Black Box • Matter- anything that… • Has mass (resists changes in motion) • Has volume (takes up space) • Energy- anything that… • Changes matter (moves it) (Kinetic Energy) • Stores up energy to move later (Potential energy)
The Balloon Test • A way to decide if you are dealing with matter or energy. Ask yourself… • Can I fill a balloon with it? • If yes it is matter • If no it is not
The energy test … potential or kinetic?Ask yourself…what, if anything, is moving.
The Kinetic Molecular Theory • Kinetic – refers to the energy of motion • Molecular – referring to molecules or groups of atoms bonded together • Theory – an explanation of observations http://www.media.pearson.com.au/schools/cw/au_sch_whalley_sf1_1/int/2_slg.html
Particles are in constant, random motion http://www.chem.purdue.edu/gchelp/atoms/states.html
Strength of attractive forces varies Iron water oxygen
More cool observations about matter…. Take out loose-leaf. Put a full heading on the top. Call this “Two More Observations of Matter”
On the paper predict what will happen if we hit this meter stick with a hammer. Don’t forget a rationale.
Now predict what will happen if we heat this can and then suddenly cool it in an ice water bath?
Matter and Energy Observations • Matter sometimes floats • In air • In water