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27 Cards in this Set
- Front
- Back
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What are the three states of matter? |
Liquid, solid and gas |
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What must happen to change a solid? |
particles must have enough energy to vibrate faster and separate from each other |
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All materials can exist as solid, liquid, or gasses if what is right? |
Temperature |
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The change of state from liquid to gas at the surface of a liquid? |
Evaporation |
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The change of state from a gas to a liquid? |
Condensation |
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A substance that dissolves other materials? |
Solvent |
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What is the solid that is dissolved in a liquid? |
Solute |
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Each element contains only one kind of particle, called a ___? |
atom |
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A substance in which two or more elements are held together by a chemical bond? |
Compound -- example is Water H20 |
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Name the (4) properties of a substance? |
(1)Color (2)Hardness (3)State (4) whether or not it will dissolve in water |
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What is the process by which new substances with new properties form? |
Chemical Reaction |
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What is a substance that undergoes a chemical reaction ofter by combining with another substance? |
Reactant |
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What is a substance that is formed in a chemical reaction? |
Product |
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Name (4) examples of chemical reactions |
(1) Banana turning brown (2) Wood burning (3) Food cooking (4) Grass growing |
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How many different elements are there and how many are common? |
about 100 different elements and only about half of them are very common |
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What is a chemical reaction in which more energy is given off than is taken in? |
Exothermic Reaction |
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What is an arrangement of symbols and formulas used to show what happens during a chemical reaction? |
Chemical equation |
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What is an arrangement of symbols that shows both the kinds and number of atoms in a compound? |
Formula |
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What states that in a chemical reaction, NO mass is lost. The mass of the reactants equals the mass of the product. |
The Law of Conservation of Mass |
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What is a compound that releases hydrogen ions in water? |
Acid |
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Why do grapefruits, lemons and vinegar taste sour? |
Because they contain acids |
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What is a compound that releases hydroxide ions when dissolved in water? |
Base |
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What are the characterists of bases? |
They taste bitter and feel slippery |
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What is the set of numbers between 0 (zero) and 14 used to measure the strength? |
Ph Scale |
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What is a substance that changes color at a certain range of values? |
Indicator |
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Explain how blueberries use their natural indictors ? |
If you use soap to clean blueberries in a bowl… the blueberries change form a reddish purple to a greenish purple |
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What is a process in which an acid and a base react to produce a salt and water? |
Neutralization |
