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Chapter 11 Science
Matter
12
Science
8th Grade
08/27/2012

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Cards

Term
Most elements are metals. Name the physical properties.
Definition
shiny, bendable, conducts heat
Term
An object that takes up more space than another object has a greater
Definition
volume
Term
What is the density of an object that has a mass of 92 grams and a volume of 40 milliliters.
Definition
d= mass/volume

92/40 = 2.3 grms/ml
Term
How many different elements are in a molecule of CO
2
Definition
two, carbon and oxygen
Term
Particles in salts arrange themselves in a regular geometric pattern to form
Definition
crystals
Term
Why do most materials get smaller when they cool?
Definition
The particles have less space between them.
Term
When does dew for?
Definition
When vapor is cooled
Term
Materials in simple ixtures
Definition
can be separated easily
Term
In a solution, the substances that dissolves is the
Definition
solute
Term
Compare the denisty of gold in a ring and a necklace.
Definition
The gold will have the same density no matter what the gold is used in.
Term
Explain how buoyancy and density are related to each other.
Definition
If a material floats in a liquid it is buoyant. Whether is floats depends on the density of the material and the liquid. If the object's density is less than the liquid's density, it will float. If the object's density is greater than the liquid's density, it will sink.
Term
Describe the similarities and differences between mixtures and solutions
Definition
In mixtures and solutions, elements or compounds are mixed together but they are not bonded to each other. In a mixture, different materials are placed together but do not form compounds. Simple mixtures can be easily separated. A solution is a special mixture in which substances are spread out evenly and will not settle. In a solution, the solute is dissolved in the solvent. The amount of solute that can be dissolved in the solvent is a property of the substance.
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