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53 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is defined as “anything that has mass and takes up space”? |
Matter |
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What are the tiny particles that make up the molecules in matter referred to as? |
Atoms |
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What is defined as: the smallest particle of a substance that has all the properties of that substance? |
Molecules |
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What are the two different ways that matter changes? |
Through physical change or chemical change |
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In what type of change in matter do the molecules that make up the substance stay the same? |
Physical change |
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In what type of change in matter do the molecules keep the same structure and components whether it's a solid, liquid or gas? |
Physical change |
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In a physical change, the substance has the same kinds of _________ before and after it changes. |
molecules |
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What is it called when a substance undergoes a change of state? |
Physical change |
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What happens during an exothermic reaction? |
The heat is being released to the outside |
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What happens during an endothermic reaction? |
The heat is being absorbed |
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In what type of change might atoms that form molecules break away from their partner atoms? |
Chemical |
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What type of change occurs when you burn a log on a campfire? |
Chemical change |
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What type of change cannot be easily (if at all) undone? |
Chemical change |
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Whenever a chemical change occurs, what happens to the substance? |
The molecules change and a new substance forms |
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During a chemical change, what is either released or absorbed? |
Energy |
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What kind of change takes place in making a mixture? |
Physical change |
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What is a mixture? |
-2 or more substances combined -they keep their properties -can be separated. |
3 |
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What is a solution? |
A mixture in which two substances are dissolved in one another |
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In a solution, what is the substance being dissolved called? |
Solute |
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In a solution, what is the substance doing the dissolving called? |
The solvent |
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In sugar water solution, what is the sugar? |
The solute |
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In a sugar water solution, what is the water? |
The solvent |
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What does solubility mean? |
Dissolving ability |
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In a solution, what usually increases with temperature? -What is the reverse true for? |
Solubility -gasses dissolved in a liquid (solubility increases as temp decreases) |
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The more solute that has been dissolved in the solvent, the more ____________ the solution. |
concentrated |
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The less solute that has been dissolved in the solvent, the more ___________ the solution. |
diluted |
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What is the term used to describe when the maximum amount of solute that can be dissolved in a solvent at that temperature is reached? |
Saturated |
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What happens when substances combine in ways that result in a change in their properties? |
Compound (chemical change) |
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What is the smallest unit of a compound that still has the properties of that compound called? |
Molecule |
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What is a molecule made up of? |
Two or more atoms chemically bonded together |
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Water is made up of two elements that are combined by a _________ _________. |
Chemical change |
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Parts of a compound cannot be separated by what? |
Physical means |
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What is necessary to separate a compound into its original substances? |
Another chemical change |
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If two or more elements are mixed mechanically, what is the result? |
A mixture |
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In a _________, each element keeps its own properties. |
Mixture |
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What are three examples of mixtures? |
Salt water, air and coffee |
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The elements may be separated from the mixture by ________ means. |
Mechanical |
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The elements in a _________ may be mixed in any amount. |
mixture |
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When two or more elements are combined chemically, what is the result? |
A compound |
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In a _________, the elements lose their identities and become another substance with different properties. |
Compound |
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The elements that form a __________ are always combined in the same proportions. |
compound |
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A mixture or a solution is the result of what kind of change? |
Physical |
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A compound is the result of what kind of change? |
Chemical |
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What happens to the properties of substances that are combined to form a mixture? |
They keep their properties and can enter the mixture in any amount |
2 |
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What happens to the properties of a substance that are combined to form a compound? |
The elements lose their identities and become another substance with different properties |
2 |
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When you mix instant coffee with water, what is the result? |
A solution |
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In a solution of sugar and water, which is the solvent and which is the solute? |
Sugar is the solute and water is the solvent |
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In what type of change do the molecules that make up the substance stay the same? |
Physical change |
Ice melting |
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In what type of change do the properties of the substance change? |
Chemical change |
Eg, burnt toast |
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What is a solution? |
A mixture in which two substances are dissolved in one another |
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What is a compound? |
When substances combine in ways that results in a change in their properties |
Chemical |
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What is a mixture? |
-2 substances combine to form a mixture -the substances keep their properties -can be added in any amount |
3 |
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Can a mixture or a compound be separated by physical means? |
Mixture can; compound usually bcannot |
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