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Chapter 1 Intro to Matter

Use your textbook pages 1-47 and your notebook to complete this crossword. 
Across
Separating small particles out of a liquid mixture
Reaction that gives off heat
Decomposition with electricity p. 24
Symbol for beryllium
A - substance is formed from a chemical change
What is a molecule made of?
Average kinetic energy
Another name for thermal enerrgy. - flows from a warm object to a cold one.
Variable that responds to the changes planned as part of the experiment
Element with the symbol Sn
The law of - of mass states that during a chemical or physical change mass is not lost.
The force of attraction holding hydrogen and oxygen together in a molecule of water
Explanation of a wide group of data from many experiments
Element in group 17; a halogen with symbol F
An element found in glass or concrete
Boiling is an - change because it requires an energy input.
An element found in organic or living things
Variable that is graphed on the x axis
State of matter with rapidly moving random particles that are spread far apart; no definite shape or volume
- may be homogeneous or heterogeneous.
Liquids have no - shape.
Hydrogen - has the formula H2O2.
N2 molecules are just the element -.
Down
A type of energy; sum of all the KE of all the particles in a sample
Table salt or sodium chloride
Larger than a millimeter
Burning, p. 24
Metals turn dark, p. 24
Water is a ---.
-- tension is a property of liquids.
Measure of the force of gravity on an object
A km is - times larger than a hm
Showed mass of reactants before and products after a reaction weigh the same
Separating liquid mixtures by boiling and condensing
A clear, uniform mixture like salt water.
Density of water in g/mL
Dissolving is a -- change.
Every time matter changes physically or chemically there is a corresponding change in -.
State of matter with a definite state and volume
Element with the symbol S
Does not change with location like weight does
Has the formula H2O.
To dissolve something is to - until the substance disappears in a liquid