Physical Science Chapter 2

By party13, Sep 2010

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Fill in the blanks and give examples for the last row	possible example for; elements: gold compounds: water homo: air Hetero: granite
mass (is/is not) the same as weight	is not
What are the four main ideas of the Particle Model?	1. All matter is made of particles 2. Particles are always moving 3. There is space between the particles 4. The particles attract each other
Note whether the following are positive, negative, or neutral. Answers may be used once, more than once, or not at all. protons:_______ Neutrons:________ Electrons:_______	protons are positive neutrons are neutral electrons are negative
Where are electrons found?	circling the neucleus
What is the difference between a physical and chemical change?	A physical change does not alter the composition of the material. A chemical change occurs when atoms of different elements are rearranged and ombine in different ways. Therefore, while objects that have been physicaly changed remain basically the same, objects that have been chemically changed come out different.
What are the distinguishing characteristics of solids?	their definite shape definite volume and low compressability
What are the distinguishing characteristics of liquids?	definite volume no definite shape low compressibility- while they are close together, they are mobile.
What are the characteristics of a gas?	indefinite volume indefinite shape high compressibility The particles are far apart and move quickly
What is the 4th state of matter?	plasma

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