Chapter 1: Matter and Measurement

Question 1

What is an Element?

Answer 1

Simplest form of matter
Ca, O, H

Question 2

What are atoms?

Answer 2

Smallest unit into which an element can be divided w/o losing its identity

Question 3

What are molecules?

Answer 3

Two or more atoms joined together in an arrangement

Question 4

What is matter?

Answer 4

Anything that occupies space and has mass

Question 5

How do we classify matter?

Answer 5

By physical form, composition and properties

Question 6

What are examples of physical form

Answer 6

Solid, liquid and gas

Question 7

What are two examples of composition?

Answer 7

Pure substance and matter

Question 8

What is a Pure substance?

Answer 8

Consists of one type of particle, matter made up all of the same type of atom.

Question 9

can a pure substance be an element or compound?

Answer 9

Yes

Question 10

What are types of mixtures?

Answer 10

Homogenous and heterogenous

Question 11

What is a homogenous mixture?

Answer 11

Has uniform composition, smooth blended coffee

Question 12

What is a heterogenous mixture?

Answer 12

not uniform, cereal on top of milk

Question 13

Decantation

Answer 13

separation of solid/liquid by pouring off liquid to leave solid behind

Question 14

Distallation

Answer 14

Seperation of two liquids w/ diff boiling points

Question 15

Extraction

Answer 15

removal of a substance by force or miscibility ( when a liquid dissolves into another)

Question 16

Filtration

Answer 16

seperation of s/l or s/g mixture by using a filter that permits fluid to pass through but keep the solid particles

Question 17

Sieving

Answer 17

seperation of a mixture by particle size. sieving powdered sugar

Question 18

What are the types of changes in matter?

Answer 18

Physical and chemical

Question 19

What is physical change

Answer 19

change that alters the state or appearance w/out changing composition

Question 20

Examples of physical change?

Answer 20

Boiling, melting, freezing, flattening, ripping

Question 21

What is chemical change

Answer 21

change that alters composition of matter. rusting, burning, etc.

Question 22

What is an intensive property

Answer 22

result is not based on amount of matter. Temp, luster, boiling point

Question 23

What is an extensive property

Answer 23

result is determined by amount of matter. Weight, mass, volume

Question 24

What is the Kinetic molecular Theory

Answer 24

” matter consists of tiny particles in constant motion”

Question 25

macroscale particles

Answer 25

human eye can see

Question 26

microscale particles

Answer 26

need microscope, plant and animal cells

Question 27

Nanoscale particles

Answer 27

atoms and molecules, need microscope

Question 28

Law of constant Composition

Answer 28

The law of constant composition says that, in any particular chemical compound, all samples of that compound will be made up of the same elements in the same proportion or ratio.