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36 Cards in this Set
- Front
- Back
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What is matter?
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Any substance that has mass and takes up space
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What is chemistry?
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The science that deal with matter and its changes
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What is a chemical change?
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A reaction where substances react and new substances take their place. Gasoline burning is an example of a chemical change.
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What is a physical change?
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A situation when substances react but the substances do not change. Ice changing to water is an example of a physical property change.
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What is a chemical property?
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The chemical reactions that a substance undergoes.
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What is a physical property?
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Properties that do not involve chemical reactions. Usually, physical properties are changes in color, melting point or change of state.
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What is the scientific method?
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A set of procedures that scientists used to test theories.
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What is a fact?
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A statement or observation based on direct experience.
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What is a hypothesis?
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A statement that is proposed without actual proof to explain the facts and their relationships.
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What is a theory?
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Formulation of an apparent relationship amount certain observed phenomena, which has been verified by experiment to some extent.
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What is the difference between a hypothesis and a theory?
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A hypothesis is an "educated guess". A theory develops after a hypothesis goes through many tests. A theory is more believable, due to it being tested more than a hypothesis.
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What is exponential notation?
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A method of writing very large or small number using the powers of ten.
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What are significant figures?
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The amount of precision in a number, the number of absolutely know values.
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What is an SI unit?
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It is an international system of units that scientists from around the world agreed on.
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What is the metric system?
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An SI unit of measurement based on the unit of 10.
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Solids have...
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Definite shape and a definite volume.
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Liquids have...
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Indefinite shape but definite volume.
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Gases have...
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Indefinite shape and indefinite volume.
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What is density?
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The amount of mass per unit volume.
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What is specific gravity?
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A ratio of the density of a substance compared to the density of water. Has no units.
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Energy is defined as...
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The capacity to do work.
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Kinetic energy is also called the energy of _______
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motion
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Potential energy is also called ________ energy.
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stored
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What are some of the forms of energy that exist?
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Mechanical energy- light energy, heat energy, and electrical energy, chemical energy.
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What is the law of conservation of energy?
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Energy can neither be created nor destroyed.
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What is heat?
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A form of energy that most frequently accompanies chemical reactions.
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What is a calorie?
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The amount of heat necessary to raise the temperature of 1 gram of a liquid water by 1 degree Celsius.
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What is the SI unit for calories?
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Joule. Pronounced like "cool".
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What is specific heat?
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Amount of heat necessary to raise the temperature of one gram of any substance by 1C
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What is volume?
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The space that matter occupies.
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What is mass?
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The quantity of matter in an object.
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What is the difference between mass and weight?
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Mass is independent of location. For example, the mass of a stone is the same whether on a mountain or in the bottom of the ocean. However, weight is the force that mass experienced under the pull of gravity. For example, the weight of the same stone is different on a mountain than on the bottom of the ocean.
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How are mass and weight similar?
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Mass is always directly proportional to weight and depends on the force of gravity.
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What is Kelvin?
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The SI unit of absolute temperature measurement in science.
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What is the relationship between Kelvin and Celsius?
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degrees C + 273 = K
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What is absolute zero?
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The lowest possible theoretical temperature where all atomic motion ceases.
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