Matter

Question 1

Matter

Answer 1

Anything that takes up space and has mass

Question 2

solid

Answer 2

has definite shape and a definite volume

Question 3

liquid

Answer 3

has definite volume, but not a definite shape; takes the shape of its container limited by its volume

Question 4

gas

Answer 4

has no definite volume and no definite shape; expands to fill its container

Question 5

examples of physical properties

Answer 5

color, odor, density, melting point, boiling point, etc.

Question 5

physical property

Answer 5

characteristics of a substance that can be observed without altering the identity of the substance

Question 6

chemical property

Answer 6

characteristics of a substance that cannot be observed without altering the identity of the substance

Question 7

Physical change

Answer 7

does not alter the identity of the substance

Question 8

examples of chemical properties

Answer 8

flammability, reactivity, etc.

Question 9

examples of physical change

Answer 9

• Crumpling a sheet of aluminum foil
• Melting an ice cube
• Casting silver in a mold
• Breaking a bottle
• Boiling water
• Evaporating alcohol
• Shredding paper
• Sublimation of dry ice into carbon dioxide
  vapor
• Carbon changing from graphite into a
  diamond

Question 10

chemical change

Answer 10

changes the identity of the substance

Question 11

examples of a chemical change

Answer 11

• Burning wood
• Souring milk
• Mixing acid and a base
• Digesting food
• Cooking an egg
• Heating sugar to form caramel
• Baking a cake
• Rusting of iron

Question 12

pure substance

Answer 12

matter made of one kind of substance with an unique set of chemical and physical properties

Question 13

examples of pure substances

Answer 13

elements, compounds, molecules

Question 14

mixture

Answer 14

blend of 2 or more pure substances that are not chemically combined

Question 15

homogeneous mixture

Answer 15

same throughout

Question 16

heterogeneous mixture

Answer 16

not uniformly intermingled with visibly different parts

Question 17

solution

Answer 17

homogeneous mixture of 2 or more substances in the same physical state

Question 18

solute

Answer 18

substance that is dissolved in a solvent to form a solution

Question 19

solvent

Answer 19

substance that does the dissolving in a solution

Question 20

name the four methods to separate mixtures

Answer 20

• filtration
• chromatography
• distillation
• recrystallization

Question 21

filtration

Answer 21

to separate the solid from liquid

Question 22

chromatography

Answer 22

separation by color, size, and polarity

Question 23

distillation

Answer 23

separation by boiling ; each substance has an unique boiling point; mixture MUST be liquid

Question 24

recrystallization

Answer 24

evaporate liquid and solid remains behind