investigation 3 2 air is matter 2010
TRANSCRIPT
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Air is MatterInvestigation 3.2
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Everything is made of elements. What elements could be in the gas that
forms when sodium bicarbonate (NaHCO3) and citric acid (C6H807) react?
•Sodium (Na)•Hydrogen (H)
•Oxygen (O)•Carbon (C)
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What gas do you think is in the
bubbles that form when NaHCO3 and
C6H807 react?
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What is air?•How do you know when something is a gas?
•What is gas made of?•How do you know when something is matter?
•Is gas matter?
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Syringe system
•Work alone with one system or with a partner using two
•Clamp the tubing with the binder clip
•Work with or without air in the syringe
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•Does air take up space?
•What is your evidence?
•Does air always take up the same amount of space?
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•Gases in air have mass and occupy space
•Therefore air isMATTER
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Compression•Air can be forced into a smaller space
•Air that is forced into a smaller space is called COMPRESSED air
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When the force is removed, the air
EXPANDS
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Particulate Model
•Air is composed of particles too small to see
•Particles are in constant motion
•There is SPACE between the particles of air