Unit 1 test

Question 1

mass

Answer 1

a measurement of the amount of matter an object contains

Question 2

volume

Answer 2

a measure of space occupied by the object.

Question 3

extensive property

Answer 3

a property that depends on the amount of matter in a sample.

Question 4

intensive property

Answer 4

a property that depends on the type of matter in a sample no the amount.

Question 5

substance

Answer 5

matter that has a uniform and definite composition.

Question 6

physical property

Answer 6

a quality or condition of a substance that can be observed or measured without changing the substances composition

Question 7

solid

Answer 7

a form of matter that has definite shape and volume (particles are packed tightly together)

Question 8

liquid

Answer 8

a form of matter that has an indeifinite shape and flows but has a fixed volume (particles are free to flow)

Question 9

gas

Answer 9

a form of matter that takes both the shape and volume of its container (particles are far apart)

Question 10

physical change

Answer 10

some properties of a material change but the compostion of the material does not change.

Question 11

mixture

Answer 11

physical blend of two or more components.

Question 12

heterogeneous mixture

Answer 12

a mix in which the composition is not uniform throughout.

Question 13

phase

Answer 13

term used to describe particles sample with uniform compostion and properties

Question 14

homogeneous mixture

Answer 14

a mix in which the composition is uniform throughout.

Question 15

filtration

Answer 15

process separating solid from liquid in hetero geneous mixture.

Question 16

distillation

Answer 16

liquid boiled to produce a vapor that is then condensed into a liquid

Question 17

element

Answer 17

simplest form of matter

Question 18

compound

Answer 18

substance that contains two or more elements that are chemically combined.

Question 19

chemical change

Answer 19

a change that produces matter with a different compostion that the original matter

Question 20

chemical property

Answer 20

the ability of a substance to undergo a specific chemical change

Question 21

chemical reaction

Answer 21

one or more substances change into one or more new substance.

Question 22

reactant

Answer 22

substance present at the start of the reaction

Question 23

product

Answer 23

substance produced in the reaction

Question 24

precipitate

Answer 24

a solid that forms and settles out of a liquid mixture

Question 25

law of consevation of mass

Answer 25

in any physical change of chemical reaction mass is conserved (mass is neither created or destroyed)

Question 26

measurement

Answer 26

a quantity that has both a number and a unit

Question 27

accuracy

Answer 27

measure of how close a measurement come to the actual value of whatever is measured

Question 28

precision

Answer 28

a measure of how close a series of measurements are to one another

Question 29

accepted value

Answer 29

correct value for the measurement based on reliable references

Question 30

experimental value

Answer 30

value measured in lab

Question 31

percent error

Answer 31

((experimental value - accepted value)/ divided by accepted value) * 100

Question 32

si unit of volume

Answer 32

liter

Question 33

si unit of mass

Answer 33

kg

Question 34

weight

Answer 34

force that measures the pull on a given mass

Question 35

density

Answer 35

mass divided by volume m/v