Physical and Chemical Changes

Question 1

separating crude oil into many different substances

Answer 1

distillation

Question 2

refining gemstones

Answer 2

crystallization

Question 3

separating individual pigments

Answer 3

chromatography

Question 4

cleaning the human blood of toxins

Answer 4

filtration

Question 5

separating whole blood into various plasma

Answer 5

centrifugation

Question 6

epoxy glue

Answer 6

ex

Question 7

photosynthesis

Answer 7

en

Question 8

iron rusting

Answer 8

ex

Question 9

concrete and cement setting

Answer 9

ex

Question 10

cooking an egg

Answer 10

en

Question 11

draino

Answer 11

ex

Question 12

sunburn

Answer 12

en

Question 13

sublimation of dry ice

Answer 13

en

Question 14

melting wax

Answer 14

p

Question 15

souring milk

Answer 15

c

Question 16

evaporating alcohol

Answer 16

p

Question 17

corroding iron

Answer 17

c

Question 18

freezer burn on pork chops

Answer 18

p

Question 19

maple leaves changing colors

Answer 19

c

Question 20

fermenting grapes

Answer 20

c

Question 21

sugar dissolved in water

Answer 21

p

Question 22

indigo dye fading

Answer 22

c

Question 23

iodine crystals

Answer 23

p

Question 24

physical properties

Answer 24

density, boiling point, color

Question 25

chemical properties

Answer 25

flammability, toxicity, pH

Question 26

can form vapors?

Answer 26

household ammonia, E cigarettes, dry ice, water, moth balls, gasoline

Question 27

highly flammable material

Answer 27

chemical change

Question 28

melting wax or alcohol evaporating

Answer 28

physical change

Question 29

one substance dissolves while the other remains insoluble

Answer 29

solubility

Question 30

solid material adhering to the filter paper

Answer 30

residue

Question 31

dissolved liquid passing through funnel

Answer 31

filtrate

Question 32

distillation

Answer 32

boiling point

Question 33

centrifugation

Answer 33

density

Question 34

chromatography

Answer 34

adsorption

Question 35

filtration

Answer 35

solubility

Question 36

which process permit each substance to separate in correct sequence

Answer 36

filtration, crystallization

Question 37

where is the final location of the sugar

Answer 37

sugar crystals in the evaporating dish

Question 38

where is the final location of the sand

Answer 38

adheres as a residue to the filter pressure

Question 39

what materials form a residue during filtration

Answer 39

sand

Question 40

what materials appear in the filtrate

Answer 40

sugar that is dissolved in water

Question 41

endothermic reaction

Answer 41

photosynthesis, sunburn

Question 42

exothermic

Answer 42

hand warmers, concrete setting