Law of Conservation of Mass

Question 1

Quantitative

Answer 1

Observations made when counting and measuring.

Question 2

Accuracy

Answer 2

How close your measurement is to the actual (true) value.

Question 3

Precision

Answer 3

Getting the same results with repeated measurements; having more detail in your measurements.

Question 4

Variable

Answer 4

A factor (part) of an experiment that changes

Question 5

Independent Variable (IV)

Answer 5

The factor that is being tested it is the cause of the change.

Question 6

Dependent Variable (DV)

Answer 6

The factor that is being observed to see the effect.

Question 7

Constant

Answer 7

A factor of an experiment that should not change. Most parts of the lab should remain constant.

Question 8

Observation

Answer 8

Something you can see, hear, touch, taste or smell and document; cannot be argued; everyone agrees.

Question 9

Inference

Answer 9

A conclusion that you make from your observations; can be argued; not everyone agrees.

Question 10

Meniscus

Answer 10

The curved surface of a liquid in a glass tube.

Question 11

Margin of Error

Answer 11

A measurement of the accuracy of the results of a survey.

Question 12

Dissolve

Answer 12

The act of a solid mixing into a liquid.

Question 13

Boiling

Answer 13

Steaming or bubbling up under the action of heat.

Question 14

Open System

Answer 14

An experiment without a lid or top to it.

Question 15

Estimation

Answer 15

An educated guess.

Question 16

Mass

Answer 16

A collection of atoms and molecules forming objects.

Question 17

Chemical Change

Answer 17

Results:

1) A gas was produced
2) Energy was created
3) A new substance was created
4) It’s hard to get back to the original substance

Question 18

Melting

Answer 18

A solid warming up and becoming a liquid.

Question 19

Freezing

Answer 19

A liquid getting so cold it turns into a solid.

Question 20

Closed System

Answer 20

A system with a lid and container, so no extra mass can ruin the experiment.

Question 21

Metric System Prefixes

Answer 21

Deka, hecto, kilo, deci, centi, and milli.

Question 22

Matter

Answer 22

A physical substance that occupies space and possesses mass

Question 23

Physical Change

Answer 23

Changes affecting the form of a chemical substance, but not its chemical composition.

Question 24

Condensation

Answer 24

Water that collects as droplets on a cold surface when humid air is in contact with it.

Question 25

Conserve

Answer 25

Protect something from harm or destruction.

Question 26

Law of Conservation of Mass

Answer 26

Mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.