Key Terms, Chapter 1

Question 1

What is accuracy?

Answer 1

How close a measurement is to the correct value.

Question 2

What is an atom?

Answer 2

An atom is the smallest particle of an element that can enter into a chemical combination.

Question 3

What is Celsius? What is waters freezing point and boiling point in Celsius?

Answer 3

Celsius is a unit of temperature. Water freezers at 0 degrees Celsius and boils at 100 degrees Celsius.

Question 4

What’s a chemical change?

Answer 4

A chemical change produces a new type of matter from the original.

Question 5

What is chemistry?

Answer 5

Chemistry is the study of composition, properties and interactions of matter.

Question 6

What is a compound?

Answer 6

A compound is a pure substance that can be decomposed into two or more elements.

Question 7

Cubic centimeter (cm^3 or cc)

Answer 7

Is the volume of a cube with an edge length of exactly 1cm.

Question 8

Cubic meter (m^3) is?

Answer 8

SI until of volume.

Question 9

What is density?

Answer 9

Density is the ratio of mass to volume for a substance.

Question 10

What is dimensional analysis?

Answer 10

A way to solve simple unit conversions to more complex.

Question 11

What is an element?

Answer 11

An element is a substance that is composed of a single type of atom that cannot be decomposed by a chemical change.

Question 12

Exact numbers.

Answer 12

Numbers derived by counting and does not have fault.

Question 13

Extensive property?

Answer 13

Property of a substance that depends on the amount of substance.

Question 14

Fahrenheit?

Answer 14

Unit of temperature. Water freezes at 32 degrees Fahrenheit and boils at 212 degree Fahrenheit.

Question 15

What is the three states of matter?

Answer 15

Solid, liquid, gas and plasma.

Question 16

What is gas?

Answer 16

Gas is the state in which matter has no definite volume nor shape.

Question 17

What is a Homogeneous mixture?

Answer 17

A homogenous mixture is a solution, combination of substance with a compound that is uniform.

Question 18

What is a heterogeneous mixture?

Answer 18

A heterogenous mixture is a combination of substance with a composition that varies.

Question 19

What is chemical property?

Answer 19

Relates to the change of one kind of matter to another.

Question 20

What is a hypothesis?

Answer 20

Tentative explanation of observations that act as a guide for gathering and checking information.

Question 21

What is intensive property?

Answer 21

Intensive property is property of a substance that is independent of the amount of substance.

Question 22

Kelvin (K)?

Answer 22

SI unit for temperature. 273.15k=0 degree Celsius.

Question 23

Kilogram(kg)?

Answer 23

Standard SI unit for mass.

Question 24

What’s a law?

Answer 24

A law is a statement that summarizes many experimental observations. Laws are based on detailed and repeated experiments.

Question 25

What does the law of conservation of matter?

Answer 25

The law of conservation of matters states that when matter is converted from one type to another, there is no detectable change in the total amount of matter present.

Question 26

Length?

Answer 26

Measurement of one dimension of an object.

Question 27

Length?

Answer 27

Measurement of one dimension of an object.

Question 28

What is liquid?

Answer 28

Liquid is the state of matter that has a definite volume but indefinite shape.