Science

Question 1

physical property

Answer 1

quality or condtion of a substance that can be observed WITHOUT changing the substance

Question 2

Examples of physical propeties

Answer 2

hardness, color, conductivity

Question 3

Examples of chemical property

Answer 3

flammable, decomposses in cold

Question 3

chemical changes

Answer 3

composition of matter ALWAYS changes

Question 3

Chemical property

Answer 3

can be observed only when a substance transofrms into new subtances

Question 4

physical changes

Answer 4

composition of matter NEVER changes

Question 5

composition

Answer 5

describes identity and ration of chemical elements that make up a substance

Question 6

states of matter

Answer 6

gas, liquid, solid

Question 7

clues chemical changes has happened

Answer 7

-transfer of energy
-unexpected change of color
-production of gas
-formation of precipitate, isoluble solid that forms and settles out of a liquid

Question 7

element

Answer 7

simple form of matter, unique set of properties

Question 8

compound

Answer 8

substance that contains 2 or mmore elemets chemically combined

Question 9

mixture

Answer 9

physiccal blend of 2 or more components

Question 10

heterogenerous mixtures

Answer 10

composition is not uniform throughout

Question 11

homogenous mix

Answer 11

composition is uniform

Question 12

suspension

Answer 12

heterogenous mixture from which particles settle out upon standing

Question 13

examplle of suspension

Answer 13

sand and water

Question 14

colloid

Answer 14

do not seperate on stading

Question 15

examplle of colloid

Answer 15

milk

Question 16

tyndall effect

Answer 16

scatter of light or felection of light on particles suspended in solution

Question 17

mass of product is the same as –

Answer 17

mass of reactant

Question 18

disstilliation

Answer 18

a liquid is boiled to produce vapor that is condesned into a liquid

Question 18

pipestem triangle

Answer 18

used to hold crucibles when they are being heated

Question 19

evaportating dish

Answer 19

used to heat and evaporate liquids

Question 20

watch glass

Answer 20

usted to cover beakers so a reaction can be obsereved safely

Question 21

mortal and pestel

Answer 21

used to crush solids into powder

Question 23

crucible

Answer 23

used to heat small quantites to a very high temp