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43 Cards in this Set
- Front
- Back
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Define volume
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the space occupied by a substance
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In the metric system what unit is used for volume?
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Liter (L)
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How would you measure volume?
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using a graduated cylinder
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In the metric system how would you measure length?
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Using a meter stick (m)
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Define mass
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the quantity of material it contains
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How is mass measured?
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On a balance
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In the metric system, what unit do we use for mass?
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gram (g)
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Define temperature
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How hot or cold a substance is
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what scale is temperature measured in the metric system?
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Celsius (C)
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The SI system uses what scale to measure temperature?
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Kelvin (K)
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What unit do both the metric and SI system use to measure time?
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seconds (s)
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how would the width of on object equal to 0.000 008 m be written in scientific notation?
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8 x 10(-6)m
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a large scale number such as 2 500 000 s would be written how in scientific notation?
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2.5 x 10(6)s
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Where is the coefficient found in a scientific notation?
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the first number- such as the 1.5 in the notation 1.5 x 10(2)
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All non-zero numbers in a measured number are what?
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significant
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Where are sandwiched zeros found and are the significant or not?
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between nonzero number (50.8). they are significant.
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Where are trailing zero's found, what are the usually called and are they significant?
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they follow non-zero numbers (25 000 cm). Usually called place holders. They are not significant.
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Where are leading zeros found. Are the significant?
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they precede non-zero digits in a decimal number (0.008 m). They are not significant.
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1 foot= 12 inches is an example of what type of relationship?
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defined relationship
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An exact number is obtained from what two source?
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objects that are counted and numbers in a defined relationship.
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Define chemical
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a substance that always has the same composition and properties wherever it is found.
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Define chemistry
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the study of the composition, structure, properties and reactions of matter.
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define scientific method
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The process of making observations, proposing a hypothesis, testing the hypothesis and developing a theory that explains a natural event
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what are the steps to a scientific method, in order?
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1. observation 2. Hypothesis 3. Experiments 4. Theory
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Define observation
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Information determined by noting and recording a natural phenomenon
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Define Hypothesis
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An unverified explanation of a natural phenomenon
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Define experiment
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a procedure that tests the validity of a hypothesis
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Define Theory
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an explanation of an observation that has been validated by experiments that support a hypothesis
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A milli is equal to
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0.001 on thousandths of
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Kilo equals
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1000
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pure substance
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A type of matter composed of elements and compounds that had a definite composition.
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Element
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a pure substance containing only one type of matter, which cannot be broken down by chemical methods.
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Compounds
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A pure substance consisting of two or more elements, with a definite composition, that can be broken down into simpler substances only by chemical method.
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mixtures
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the physical combination of two or more substances that does not change the identities of the mixed substances.
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homogeneous mixture
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A solution/ the composition is uniform throughout the sample. eg...air (oxygen and nitrogen gases); seawater (salt and water)
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heterogeneous mixture
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the components do not have a uniform composition throughout the sample. e.g.: Oil and water; pepperoni pizza
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Physical change
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A change in which the physical properties of a substance change without any change in its identity.
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Chemical Properties
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the properties that indicate the ability of a substance to change into a new substance
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Chemical change
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a change during which the original substance is converted into a new substance that has a different composition and new chemical and physical properties.
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physical properties
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the properties that can be observed or measured without affecting the identity of a substance.
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change of state, appearance, shape or size are what type of changes
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physical changes
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color, shape, odor, luster, size, melting point and density are
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physical properties
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the ability of a substance to form another substance is
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chemical properties
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