Physical Science- Kinetic Energy Ect.

Front 1

explains how particles of matter behave

Back 1

kinetic theory

Front 2

3 assumptions

Back 2

-all matter is composed of tiny particles
-these particles are in constant random motion
- these particles are colliding with each other and the walls of the container

Front 3

-total energy of particles both kinetic and potenital
-as temp decreases ____ decreases

Back 3

thermal energy

Front 4

average kinetic energy of particles

Back 4

temperature

Front 5

-particles close together
-definate shape & volume
-specific geometric arrangement
- properties can be attributed to arrangement

Back 5

solids

Front 6

temp at which a solid begins to liquify

Back 6

melting point

Front 7

_____ is needed for particles to change from solid to liquid

Back 7

energy

Front 8

amount of energy needed to change from solid to liquid is called

Back 8

heat of fusion

Front 9

liquid particles have more what than solid particles?

Back 9

kinetic energy

Front 10

What can particles do in a liquid?

Back 10

slide past each other

Front 11

liquids have no defintie _______ becuse they take shape of their container

Back 11

shape

Front 12

makes liquid particles have a definate volume

Back 12

attraction

Front 13

have enough energy to overcome attraction between particles ( no definate shape or volume)

Back 13

gases

Front 14

liquid particles gain enough energy to escape attractive forces and become a gas

Back 14

vaporization

Front 15

differences between boiling and evaporation

Back 15

boiling happens throughout and evap. happens at surface

boiling occurs at a certain temp and evap occurs all the time

Front 16

temp at which pressure of vapor in liquid is equal to pressure on surface of liquid

Back 16

boiling point

Front 17

amount of energy needed for liquid to become a gas

Back 17

heat of vaporization

Front 18

spreading of particles throughout a given volume until uniformly distributed

Back 18

diffusion

Front 19

diffusion can occur in solid or liquid but rappidly in ____

Back 19

gas

Front 20

most common state of matter in universe that consists of positive and negative chared particles. found in lightining bolts and stars

Back 20

plasma

Front 21

increase in size of substance when temp is increasedd

Back 21

thermal expansion

Front 22

ex of expansion in liquids

Back 22

thermometers

Front 23

ex of expansion in gases

Back 23

hot air balloons

Front 24

exception of expansion in liquids is

Back 24

water

Front 25

without form,lack structure, no exact temp where phase change occurs.
example- glass and plastic

Back 25

amorphus solids

Front 26

start to flow during melting phase, but do not lose arrangement completely

responsive to temp changes and electric feilds

can be used to make LCD displays

ex: watches clocks calulators, ect,

Back 26

liquid crystals

Front 27

can't be broken down easily

compnetns maintain properties of original substance

ex: elemnet, compound

Back 27

pure substance

Front 28

substance with atoms that are alike

90 occutr in nature >20 are created in labs

Back 28

elements

Front 29

2 or more elements combines in a fixed proportion

Ex. water

Back 29

compound

Front 30

made up of two or more substances that can be seperated by physical means

-hetro or homo

Back 30

mixtures

Front 31

different materials can be distinguished easily in a mixture

ex. pizza concrete

Back 31

hetrogenous

Front 32

2 or more substances blended evenly throughout
-soft drink vinegar air

Back 32

homogenous

Front 33

homogenous mixture of particles so small they cant be seen with a microscope and will never settle to the bottom of a container

Back 33

solution

Front 34

heterogenous mixture that never settles; particles are larger than solution particles but not heavy enough to settle

ex-paint fog

Back 34

colloid

Front 35

used to tell apart a solution and a colloid

scatteting of light by colloid particles

Back 35

tyndall effect

Front 36

heterogenous mixture containing a liquid in which visible particles settle

ex-pond water

Back 36

suspension

Front 37

substance being dissolved

Back 37

solute

Front 38

substance doing the dissolving

Back 38

solvent

Front 39

solution can be _ _ or _

Back 39

S,L or G

Front 40

alloys-made by melting solids together

Back 40

solid solutions

Front 41

occurs at surface of solid, solevent molecules cluster aroundsolute molecules and pull them into solution

Back 41

dissolving solids in liquids

Front 42

rates of dissolving are affected by:

Back 42

stirring, crystal size and temperature

Front 43

increasing pressure and decreasing temp increse

Back 43

the rate of dissolving gases in liquids

Front 44

any characteristic of a material that you can observe without changing the identity of the substance

ex.- color shape size Mp Bp

Back 44

physical property

Front 45

uses of physical properties

Back 45

describe apperance, behavior and seperate things

Front 46

change is size shape or state of matter

ex- distiliation- used for seperating substances in a mixture by evaoporating a liquid and recondensing its vapor

Back 46

physical change

Front 47

characteristic of a substance that indicates whether it can undergo a chemical change
ex- flammability

Back 47

chemical property

Front 48

change of one substance to another

used to seperate things

Back 48

chemical change

Front 49

clues that change is occuring

Back 49

heat light sound bubbles

Front 50

big rocks split into smaller ones; one location to another

Back 50

physical weathering

Front 51

acid rain changes rock from one type to another

Back 51

chemical weathering

Front 52

law of conservation of mass

Back 52

mass of all substances present before a chemical change equals mass of all substances that remain after the change