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Chap 2 Vocabulary Quiz 2

mass the quantity of matter in an object or substance
weight the gravitational attraction for an object's mass
volume the space an object occupies
ion atoms with more or fewer electrons than protons
force a push or a pull
gravity it gives objects weight
work a force that acts on an object as it moves through a distance
energy the ability to do work
1st law of thermodynamics energy cannot be created or destroyed, but can only change from one form to another
atom the smallest building block of matter
element a pure substance made of one kind of atom
molecule distinct particles formed by the combination to 2 or more atoms
physical change when matter changes in a way that alters the appearance but not it's composition
chemical change when a pure substance changes into another substance
nuclear change when an atom emits protons or neutrons
compound formed with the combination of 2 or more elements
Created by: biobob
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