chapter one

Question 1

chemistry

Answer 1

branch of science that involves the study of the composition, structure and properties of matter

Question 2

matter

Answer 2

physical substance in general that which occupies space and possesses rest mass, especially as distinct from energy

Question 3

pure substance

Answer 3

a sample of matter with both definite and constant composition and distinct chemical properties

Question 4

mixture

Answer 4

a substance made by mixing other substances together, multiple compounds

Question 5

element

Answer 5

one substance

Question 6

compound

Answer 6

multiple elements

Question 7

physical properties

Answer 7

can be observed or measured without changing the composition of matter

Question 8

chemical properties

Answer 8

a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed

Question 9

how are mixtures separated

Answer 9

filtration, evaporation, distillation

Question 10

physical changes

Answer 10

how it looks

Question 11

chemical changes

Answer 11

chemical composition

Question 12

forms of energy

Answer 12

activation, potential, kinetic, thermal, chemical, nuclear

Question 13

volume

Answer 13

amount of 3d space the object occupies

Question 14

density

Answer 14

ratio of mass to volume

Question 15

significant digits

Answer 15

zeros before are not significant
zeros after are significant
when multiplying/dividing, as many significant digits as less precise measurement

Question 16

endothermic

Answer 16

absorb

Question 17

exothermic

Answer 17

release