100 200 400 300 400 vocabulary Physical & chemical changes Signs of a chemical change More vocab 300...
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Transcript of 100 200 400 300 400 vocabulary Physical & chemical changes Signs of a chemical change More vocab 300...
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vocabulary Physical & chemical
changes
Signs of a chemical change
More vocab
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Row 1, Col 1
__________is a mixture with parts that blend so that it looks the same everywhere,
even under a microscope
solution
1,2
a burning match is an example of a __________change
Chemical
1,3
changes _______________(bleach removes _____ from clothing
by means of a chemical change)
color
1,4
part of a solution in the smaller amount and that is dissolved
solute
2,1
chemicals on the left side of a chemical equation
reactants
2,2
melting ice is an example of a ___________ change
physical
2,3
forms ________________(the silver in a spoon reacts
with oxygen or sulfur to form...)
tarnish
2,4
chemicals on the right side of the chemical equation
product
3,1
the change of state directly from a solid to a gas
sublimation
3,2
during a chemical reaction, matter isnot created or _________ but only changes form.
destroyed
3,3
releases __________(as an antacid reacts with water,
bubbles of carbon dioxide ___form)
gas
3,4
formed by the combination of two or more elements
compound
4,1
temperature at which a substance melts
Melting point
4,2
Name two things you can do to make something dissolve quicker
(this is an essay ques on the test so you shouldAlso know why this helps something dissolve)
Stir, add heat (gets the molecules moving faster)
4,3
forms a _______________(when 2 solutions form a ______, a chemical change has occured)
precipitate
4,4
part of the solution in the larger amount that dissolves the other substances
solvent
5,1
is a physical combination of substances
mixtures
5,2
What signs tell you that a log burning in a fire is a chemical change?(also an essay question but it will be a Different example – will need to know
All 5 signs of a chemical change)
gas released,log changes color,heat/light energy released
5,3
releases __________(a release of ____as light or heat can indicate a chemical change)
energy
5,4
The melting point of water is ____
0 C