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50 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is physical property? |
A characteristic of a pure substance that can be observed without changing into another substance |
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What are some examples of physical property? |
-Density/melting point -Texture and color -Flexibility |
3 things |
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What is chemical property? |
A characteristic of a pure substance that describes its ability to change into different substances |
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What are some examples of chemical property? |
-New substances, new properties -flammability -ability to react
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3 things |
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What is physical change? |
Any change that alters the form or appearance of matter that does not make any substance in the matter into a different substance |
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What are some examples of physical change? |
-Changes of state -Changes in shape or form |
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What is chemical change? |
A change in matter that produces one or more new substances A.K.A a chemical reaction |
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What are some examples of chemical change? |
-Burning of natural gas(combustion) -electrolysis -oxidation -tarnishing |
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What are some signs chemical change has occurred? |
Fire, breaking down of molecules, rusting, and tarnishing. |
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What is an atom? |
The basic particle from which all elements are made |
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What is a molecule? |
Groups of two or more atoms held together by chemical bonds |
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Whats the difference between an atom and a molecule? |
Atoms make up molecules and elements |
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What is the law of conservation of matter? |
The fact that matter is not created or destroyed in any chemical or physical change |
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How did the "density of gas" lab prove the low of conservation of matter? |
It showed that the tablet didn't disappear, it merely turned into a gas |
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What are pure substances? |
Elements! Cannot be broken down in to any simple-er form |
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What is the smallest particle of an element? |
An atom! |
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Whats the smallest part of a compound? |
Molecule |
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How are the atoms in a molecule bound together? |
by a chemical bond (A force of attraction between 2 atoms) |
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If you separate the atoms in a molecule (compound), will the individual atoms have the same properties as the molecule/compound? |
No. Compounds have properties that are different from the substances that they are composed of |
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What are the phases/states of matter? |
Texture, shape, size, color, temp, smell, etc ----or---- Solid, liquid, gas |
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What is the difference between endothermic and exothermic change? |
In endothermic change, energy is taken IN. In exothermic change, energy is real eased OUT. |
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Whats an example of endothermic change? |
Ice melting |
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Whats an example of exothermic change? |
Combustion |
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What is combustion? |
The process of burning something |
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How does energy flow? |
Thermal energy flows from warmer matter to cooler matter |
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How does energy change into different forms? |
In many ways, like combustion, lighting a match, etc. |
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What is volume? |
The amount of space that matter occupies |
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What is mass? |
a measure of how much matter is in an object |
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What is density? |
The ratio of the mass of the mass of a substance |
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What can you use to measure volume? |
For fluid: graduated cylinder For solids: base x width x height For irregular solids: drop in water and calc. how much the water rises |
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What can you use to measure mass? |
Using a balance |
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What do volume and mass have to do with density? |
density is the ratio of mass and volume |
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How does energy change during photosynthesis? |
through a series of chemical changes in which plants convert electromagnetic energy form the sun into chemical energy |
E to C |
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What is matter? |
anything that has mass and occupies space |
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What is a compound? |
A pure substance made of 2 or more elements chemically combined |
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What is a substance? |
a single kind of matter that is pure and has a specific set of properties |
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What is an element? |
a pure substance that cannot be broken down into another substance by chemical or physical means |
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What is a chemical bond? |
the force that holds atoms together |
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What is a mixture? |
2 or more substances that are mixed together but not chemically combined |
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What are the 2 types of mixtures? |
Heterogeneous and homogenous mixtures |
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What is a heterogeneous mixture? |
a mixture in which pure substances are unevenly distributed throughout the mixture |
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What is a homogenous mixture? |
A mixture in which substances are evenly distributed throughout the mixture |
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What is a solution? |
a well mixed mixture containing a solvent and at least 1 solute that has the same properties throughout |
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What is energy? |
the ability to do work or cause change |
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What is temperature? |
a measure of the average energy of motion of the particles of a substance |
of, of, of, of |
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What is thermal energy? |
The total potential and kinetic energy of the particles in an object |
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What is chemical energy? |
a form of potential energy that is stored in chemical bonds between atoms |
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What is electrical energy? |
the energy of moving electrical charges |
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What is electromagnetic energy? |
a form of energy that travels through space in the form of waves |
electromagnetic spectrum |
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What is an electrode? where's it used? |
a metal strip that conducts electricity to form new substances |
look on pg 76 for more |
