chem h unit 2

Question 0

Kinetic energy

Answer 0

Energy of motion ex riding a bike

Question 1

Energy

Answer 1

The capacity to do work or to produce heat

Question 2

Potential energy

Answer 2

Energy of position ex holding and object up

Question 3

Radiant energy

Answer 3

Energy of the sun

Question 4

3 main forms of energy

Answer 4

Kinetic, potential radiant

Question 5

Most common unit if energy

Answer 5

Calorie

Question 6

SI unit for energy

Answer 6

Joule (J)

Question 7

Mechanical energy

Answer 7

Kinetic, an objects movement creates energy

Question 8

Thermal energy

Answer 8

Kinetic, vibration and movement if molecules

Question 9

Radiant energy (sub)

Answer 9

Electromagnetic waves, kinetic

Question 10

Electrical energy

Answer 10

Kinetic, movement of electrons

Question 11

Chemical energy

Answer 11

Potential, stored in bonds of atoms and molecules

Question 12

Nuclear energy

Answer 12

Both, stored in nucleus of an atom; released when nucleus splits or combines

Question 13

Sound energy

Answer 13

Kinetic, vibration of waves through material

Question 14

Gravitational energy

Answer 14

Potential energy of position or height

Question 15

Solids

Answer 15

Hold their shape, definite volume, organized particles, usually have a high density

Question 15

Solids

Answer 15

Hold their shape, definite volume, organized particles, usually have a high density

Question 16

Liquids

Answer 16

“Flow” occupies a definite volume, no fixed shape, takes the shape of its container, usually has a lower density than solids

Question 16

Liquids

Answer 16

“Flow” occupies a definite volume, no fixed shape, takes the shape of its container, usually has a lower density than solids

Question 17

Gases

Answer 17

No definite shape or volume,expands to fill container, usually has lower densities than solids and liquids

Question 17

Gases

Answer 17

No definite shape or volume,expands to fill container, usually has lower densities than solids and liquids

Question 18

Chemical property

Answer 18

Characteristics of a substance that cannot be observed without altering the substance ex flammability

Question 18

Chemical property

Answer 18

Characteristics of a substance that cannot be observed without altering the substance ex flammability

Question 19

Physical property

Answer 19

Characteristics of a substance that can be observed without altering the identity of the substance ex density, color, melting point

Question 19

Physical property

Answer 19

Characteristics of a substance that can be observed without altering the identity of the substance ex density, color, melting point

Question 20

Chemical change

Answer 20

A change that alters the chemical makeup of a substance ex h2 + o= h2o (changing from an element to a compound ex burning wood, cooking food

Question 20

Chemical change

Answer 20

A change that alters the chemical makeup of a substance ex h2 + o= h2o (changing from an element to a compound ex burning wood, cooking food

Question 21

Ways to identify a chemical change

Answer 21

Color change, bubbling or fizzling, light production, smoke, presence or removal of heat

Question 21

Ways to identify a chemical change

Answer 21

Color change, bubbling or fizzling, light production, smoke, presence or removal of heat

Question 22

Physical change

Answer 22

A change that doesn't alter the chemical makeup of a substance ex changing from a pure substance to a mixture ex crushing, tearing, change in state

Question 22

Physical change

Answer 22

A change that doesn't alter the chemical makeup of a substance ex changing from a pure substance to a mixture ex crushing, tearing, change in state

Question 23

Plasma

Answer 23

4th state of matter, most common in the universe, electrons fly off

Question 23

Plasma

Answer 23

4th state of matter, most common in the universe, electrons fly off

Question 24

Law of conservation of matter

Answer 24

Matter is neither created nor destroyed

Question 24

Law of conservation of matter

Answer 24

Matter is neither created nor destroyed

Question 35

Temperature

Answer 35

A measurement of how much kinetic energy the particles contain

Question 36

Kelvin

Answer 36

SI scale (lowest is 0)

Question 37

Celsius

Answer 37

Freezing point is 0d and boiling is 100d

Question 38

Fahrenheit

Answer 38

1st invented but no longer used in science

Question 39

Formula to convert Celsius to kelvin

Answer 39

K=c + 273

Question 40

Absolute zero

Answer 40

Lowest possible temperature; temp at which all motion of particles stop

Question 41

Mixtures

Answer 41

Homo or hetero; a blend of 2 pure substances, each substance keeps its own physical and chemical properties

Question 42

Homogenous

Answer 42

The substance is uniform throughout (sometimes called a solution) ex pure air, soda, pancakes, kool-aid

Question 43

Heterogenous

Answer 43

A mixture that is not uniform throughout and does not be, not smoothly ex, sand, cc cookies, tacos, fruit salad

Question 44

Pure substances

Answer 44

Have their own set of chemical and physical properties; uniform and I changing composition

Question 45

Element

Answer 45

A substance that cannot be separated into smaller substances by a chemical change particle: ATOM Symbols: 1/2 letters

Question 46

Compounds

Answer 46

Formed when 2+ different elements combine in a chemical reaction. Most matter of the universe is in this form

Question 47

Filtration

Answer 47

Separation of a solid from a liquid ex funnel

Question 48

Distillation

Answer 48

Separate a liquid from a liquid

Question 49

Crystallization

Answer 49

Separate solid particles from a distiller solution

Question 50

Sublimation

Answer 50

Separation of 2 solids when 1 sublimes and 1 does not