Chem Vocab Unit 1

Question 1

physical change

Answer 1

change to a sample of matter in which some properties of the material change, but the identity of the matter does not

Question 2

chemical change

Answer 2

change that produces matter with a different composition

Question 3

physical property

Answer 3

characteristic of a substance that can be observed or measured without changing the identity of a substance

Question 4

chemical property

Answer 4

describes the ability of a substance to undergo a specific chemical change

Question 5

extensive property

Answer 5

property that depends on the amount of matter in s a sample

Question 6

intensive property

Answer 6

property of matter that depends only on type of matter in a sample and not on the amount

Question 7

heterogeneous mixture

Answer 7

mixture in which the composition is not uniform throughout the mixture

Question 8

homogeneous mixture

Answer 8

mixture in which the composition is uniform throughout the mixture

Question 9

unit conversion factor

Answer 9

number used to change one set of units to another

Question 10

dimensional analysis

Answer 10

technique that uses units of the measurement in order to solve numerical problems

Question 11

substance

Answer 11

matter that has a uniform and definite composition

Question 12

accuracy

Answer 12

measure of how close a measurement is to the correct or accepted value of the quantity being measured

Question 13

precision

Answer 13

measure of how close a series of measurements are to one another

Question 14

mixture

Answer 14

physical blend between two or more components

Question 15

compound

Answer 15

substance that contains two or more elements chemically combined in a fixed proportion

Question 16

element

Answer 16

simplest form of matter that has a unique set of properties