unit 1 vocab

Question 1

chemistry

Answer 1

the study of matter and the changes it undergoes

Question 2

macroscopic

Answer 2

things we can see and touch. we can measure them directly

Question 3

microscopic

Answer 3

things we can imagine and measure with technology

Question 4

qualitative data

Answer 4

data from observations (color and smell)

Question 5

quantitative data

Answer 5

data of numbers

Question 6

scientific method

Answer 6

process used to help us understand the world

Question 7

law

Answer 7

__ always happens when __ happens

Question 8

theory

Answer 8

explains a body of facts and laws

Question 9

element

Answer 9

substance that cannot be separated into simpler substances

Question 10

compound

Answer 10

substance composed of atoms of 2 or more elements

Question 11

matter

Answer 11

occupies space and has mass

Question 12

substance

Answer 12

form of matter with definite composition

Question 13

physical property

Answer 13

no change in composition needed for observation

Question 14

chemical property

Answer 14

chemical change needed for observation

Question 15

extensive

Answer 15

depends on material present (mass, length, volume)

Question 16

intensive

Answer 16

does not depend on material present (temp, density, color)

Question 17

mixture

Answer 17

2+ substances that retain their own identities (tea, air, milk, coffee)

Question 18

pure substance

Answer 18

has a constant composition and distinct properties (H2O, sugar, gold)

Question 19

homogeneous mixture

Answer 19

same composition throughout (tea)

Question 20

heterogeneous mixture

Answer 20

non-uniform composition (marble)