unit 2

Question 1

Mass

Answer 1

Measure of amt of matter in an object

Question 2

Volume

Answer 2

Measure of amt of space object takes up

Question 3

Physical property

Answer 3

Property observed without matter changing entirely

Question 4

Extensive property

Answer 4

Property dependent on amt of matter

Question 5

Intensive property

Answer 5

Property dependent on what type of matter rather than the amt

Question 6

Physical change

Answer 6

Change +1 phys. Prop. without change in chem.

Question 7

Solid

Answer 7

Particles tightly packed tgt

Question 8

Liquid

Answer 8

Particles slip past each other & take shape of container

Question 9

Gas

Answer 9

Particles pull apart and spread out

Question 10

Vapor

Answer 10

Any substance normally in liquid form turned to gas

Question 11

States of matter

Answer 11

Diff phases of matter in which any they can exist in

Question 12

Substance

Answer 12

Pure substance; type of matter that has specific composition and distinct properties

Question 13

Mixture

Answer 13

Phys. blend of +2 components each retaining own identity & properties

Question 14

Solution

Answer 14

Type of mix. Where solute is completely dissolved in solvent forming single uniform base (homogeneous)

Question 15

Homogenous mix.

Answer 15

Mixture when composition is uniform throughout mixture

Question 16

Heterogeneous mix.

Answer 16

Mix. when composition isnt uniform throughout

Question 17

Phase

Answer 17

Separate layer in hetero mexture

Question 18

Chromatography

Answer 18

Separating 2 substances using mobile & stationary phase

Question 19

Distillation

Answer 19

Used to separate liquids based on diff. In boiling point

Question 20

Filtration

Answer 20

Separating mixture’s components by diff. In particle size

Question 21

Chemical change

Answer 21

When matter changes into an entirely diff. substance w/ diff chem. properties

Question 22

Chemical property

Answer 22

Prop. measured when matter changes into entirely diff. Kind of matter

Question 23

Law of Conservation of mass

Answer 23

states that matter can’t be created or destroyed

Question 24

Reactivity

Answer 24

Ability of matter to react chemically w/ other substances

Question 25

Molecule

Answer 25

Smallest particle of a compound w/ compound properties

Question 26

Flammability

Answer 26

Ability of matter to burn or be set aflame

Question 27

Reactant

Answer 27

Substance which starts chem. reaction

Question 28

Compound

Answer 28

Combos of +2 elements

Question 29

Chemical symbol

Answer 29

1-2 letter designation of element

Question 30

Product

Answer 30

Substance produced in reaction

Question 31

Element

Answer 31

Pure substance that cant be broked down further

Question 32

Chemical reaction

Answer 32

Occurrence when matter changes into entirely diff substance w/ diff chem properties

Question 33

Precipitate

Answer 33

Solid forming out of liquid mix

Question 34

List at least 3 chemical properties of matter.

Answer 34

Reactivity Flammability Acidity Basicity

Question 35

. List at least 3 physical properties of matter.

Answer 35

Melting point Boiling Point Color Hardness State of Matter Odor

Question 36

8. Explain the difference between intensive and extensive properties.

Answer 36

Extensive depends on AMT of substance you have (length, weight, mass, volume) Intensive depends on what TYPE of matter (color, odor, melting/freezing point)

Question 37

9. List at least 4 examples of chemical changes.

Answer 37

Burning release of heat/light change in color release of bubblesBurning Rotting

Question 38

10. List at least 4 examples of physical changes

Answer 38

Folding paper Cutting smth Melting ice Boiling water

Question 39

11. What are the four common states of matter? Which 3 are common on Earth?

Answer 39

Liquid, Solid, Gas and Plasma. 3 common ones to earth: Liquid, Solid, Gas

Question 40

12. Be able to sketch the difference between SOLIDS, LIQUIDS and GASSES on the molecular level.

Answer 40

solid: tightly packed tgt liquid: loosely packed tgt but move at a medium speed gas: bounce of each other moving fast

Question 41

13. Describe the difference between a homogenous mixture and a heterogeneous mixture.

Answer 41

hetero is not uniform homo is

Question 42

14. Explain at least 4 methods for separating mixtures.

Answer 42

Filtering: Separating based on differences in particle size Decanting: fancy terms for separating 2 components by pouring Distillation: separating 2 liquids based on diff in boiling points Magnetism: Used to separate magnetic substances Evaporation: Removing liquid by boiling it to leave solid behind Centrifuge: Separating substances of diff densities using fast rotational motion Chromatography: Separating 2 substances by using mobile & stationary phase

Question 43

16. Explain the law of The Conservation of Mass.

Answer 43

It states that matter can’t be created nor destroyed

Question 44

15. Explain the difference between an element and a compound.

Answer 44

Element: pure subastance of one substance Compound: pure substance of +2 substances

Question 45

17. Recognize the signs of a chemical reaction. (List at least 3 here.)

Answer 45

Change in color Change in temperature Formation of gas Formation of precipitate