Chem

Question 1

Observation

Answer 1

Is qualitative information collected through the direct use of our senses

Question 2

Interpretation (or “inference”)

Answer 2

Is an attempt to put meaning into an observation

Question 3

Qualitative Observation

Answer 3

Information is non-numerical information

Question 4

Quantitative Observation

Answer 4

Information is numerical information

Question 5

Data

Answer 5

Is quantitative information which experimentally - determined or obtained from references

Question 6

Controlled Experiment

Answer 6

Only a few factors change whereas the rest stay the same

Question 7

Hypothesis

Answer 7

Is a single, unproven assumption or idea which attempts to explain why nature behaves in a specific manner. Hypothesis are tentative but, if they survive testing, eventually gain general acceptance. (Prediction)

Question 8

Theory

Answer 8

Is a set of hypotheses that ties together a large number of observations of the real world into a logically consistent and understandable pattern. In other words, a theory is a tested, refined and expanded explanation of why nature behaves in a given way.

Question 9

Laws

Answer 9

Is a board generalization or summary statement which describes a large amount of experimental evidence stating how nature behaves when a particular situation occurs.

Question 10

Matter

Answer 10

Anything that has mass and occupies space.

Question 11

Substance

Answer 11

Is something with a unique and identifiable set of properties. Therefor, two objects with different properties must be made of different substances.

Question 12

Chemistry

Answer 12

The science concerned with the properties, composition and behaviour of matter.

Question 13

Physical Change

Answer 13

Of a substance is a property that can be found without creating a new substance. Example: density, colour, hardness, and melting temperature and physical properties.

Question 14

Chemical Change

Answer 14

A change in which new substances are formed

Question 15

Malleability

Answer 15

The ability of a substance to be rolled or hammered into thin sheets.

Question 16

Ductility

Answer 16

The ability of a material to be stretched, pulled, or drawn into a thin wire or thread without breaking

Question 17

Luster

Answer 17

A physical property that describes how a mineral’s surface and structure interact with light.

Question 18

Viscosity

Answer 18

A measure of a fluid’s resistance to flow

Question 19

Diffusion

Answer 19

The movement of molecules from high to low conservation

Question 20

Kinetic Energy

Answer 20

The energy that molecules passes as a result of their motion

Question 21

First type of kinetic energy

Answer 21

Rotational: causes a molecule to rotate around one of its axes; bond lengths and bond angles do not change

Question 22

Second type of kinetic energy

Answer 22

Vibrational: changes the bond lengths and/or angles between atoms in a molecule

Question 23

The third type of kinetic energy

Answer 23

Translational: causes the molecule to travel in a straight line from place to place, but has no effect on bond length and angles

Question 24

Accuracy

Answer 24

measures how close results are to the true or known value.

Question 25

Precision

Answer 25

on the other hand, measures how close results are to one another

Question 26

Homogeneous Substances

Answer 26

A substance consisting of only one phase

Question 27

Heterogenous substances

Answer 27

A substance consisting of more than one phase