What is Chemistry?

Question 1

What is matter?

Answer 1

Anything that occupies space and has mass

Question 2

What is a substance (a.k.a. a chemical)?

Answer 2

Matter that has a definite and uniform composition

Question 3

What is mass?

Answer 3

A measurement that reflects the amount of matter;

Independent of gravitational pull

Question 4

What is weight?

Answer 4

A measure not only of the amount of matter but also of the effect of Earth’s gravitational pull on that matter

Question 5

What is a base unit?

Answer 5

A defined unit in a system of measurement that is based on an object or event in the physical world

Question 6

What is temperature?

Answer 6

The quantitative measurement of the average kinetic energy of the particles that make up an object

Question 7

What is a derived unit?

Answer 7

A unit defined by a combination of base units

Question 8

What is volume?

Answer 8

The space occupied by an object

Question 9

What is density?

Answer 9

A physical property of matter and is defined as the amount of mass per unit volume

Question 10

What is chemistry?

Answer 10

The study of matter and the changes that is undergoes

Question 11

What is science?

Answer 11

The use of evidence to construct testable explanations and predictions of natural phenomena, as well as, the knowledge generated through this process

Question 12

What is a hypothesis?

Answer 12

A testable explanation of a situation or phenomena

Question 13

What is a theory?

Answer 13

An explanation of a natural phenomenon based on many observations and investigations over time

Question 14

What is a scientific law?

Answer 14

A relationship in nature that is supported by many experiments

Question 15

What is pure research?

Answer 15

Gain knowledge for the sake of knowledge

Question 16

What is applied research?

Answer 16

Solve a specific problem

Question 17

What is a model?

Answer 17

A visual, verbal, or mathematical explanation of experimental data

Question 18

What is scientific notation?

Answer 18

Can be used to express any number as a number between 1 and 10 multiplied by 10 raised to a power

Question 19

What is dimensional analysis?

Answer 19

A systematic approach to problem solving that uses conversion factors to move, or convert, from one unit to another

Question 20

What is a conversion factor?

Answer 20

A ratio of equivalent values having different units

Question 21

What is accuracy?

Answer 21

Refers to how close a measured value is to an accepted value

Question 22

What is precision?

Answer 22

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

Question 23

What is error?

Answer 23

Defined as the difference between an experimental value and an accepted value

Question 24

What is percent error?

Answer 24

Expresses error as a percentage of the accepted value

Question 25

What is significant figures?

Answer 25

Include all known digits plus one estimated digit

Question 26

What is the second?

Answer 26

Defined by the frequency of the radiation given off by a cesium-133 atom

Question 27

What is the meter?

Answer 27

The distance that light travels in a vacuum in 1/299,792,458 of a second

Question 28

What is the kilogram?

Answer 28

Defined by a platinum and iridium cylinder kept in France

Question 29

What is the kelvin?

Answer 29

The SI base unit for temperature