Matter and Chemical/Physical Changes/Properties

Question 1

Chemistry

Answer 1

study of composition, structure, and properties of matter. The process that it undergoes and the energy changes that accompany the process

Question 2

Chemical

Answer 2

any substance that has a definite composition (eg; sucrose, water, carbon dioxide)

Question 3

Matter

Answer 3

anything that has mass and volume

Question 4

Mass

Answer 4

measure of the amt of smth

Question 5

Volume

Answer 5

amount of 3-dimensional space an object occupies

Question 6

Atom

Answer 6

the smallest unit of element that maintains chemical identities

Question 7

element

Answer 7

a pure substance that cannot be broken down into simpler substances; single type of atom Eg; gold chlorine

Question 8

compound

Answer 8

substance that can be broken down into small stable substances - made from atoms of 2 or more elements that are chemically bonded eg; H2O

Question 9

3 states of matter

Answer 9

solid liquid gas plasma

Question 10

solids

Answer 10

incompressible
rigid tight particles
particles vibrate
FIXED VOLUME
FIXED SHAPE

Question 11

Liquid

Answer 11

incompressible
loosely packed particles
particles move
NOT FIXED SHAPE
FIXED VOLUME

Question 12

Gases

Answer 12

compressible
particles move freely
NOT FIXED SHAPE
NOT FIXED VOLUME

Question 13

matter has 2 categories

Answer 13

pure substance, mixture

Question 14

pure substances

Answer 14

have fixed properties; uniform unchanging composition

Question 15

mixtures

Answer 15

has properties that vary; combo of 2 or more substances

Question 16

Physical Property

Answer 16

a characteristic that can be observed or measured but does NOT change the sample
Eg; mass, volume, compressibility, density, melting and boiling pt

Question 17

intensive properties

Answer 17

does not depend of amt of substance present
eg; visocity, color, density

Question 18

extensive property

Answer 18

depend on amt of substance present

Question 19

chemical property

Answer 19

describes substances ability to combine or change into diff substance Eg; corrosion reactivity flammability

Question 20

chemical change

Answer 20

one or more substance that undergoes a change in composition, to form new substance
eg; cooking, combustion, oxidation, tarnish
SEVERAL INDICATORS: Color change, gas evolution, energy change eg; burning wood, fireworks, vinegar baking soda, rot banana

Question 21

endothermic

Answer 21

a chemical reaction that absorbs energy; environment feels cold

Question 22

exothermic

Answer 22

a chemical reaction releasing energy; environment feels hot

Question 23

Physical change

Answer 23

change physical appearance but NOT the composition Eg; melting, chopping, shredding paper,