Introduction to Chemistry Test

Question 1

Define Chemistry

Answer 1

The study of interactions of matter with other matter and with energy
-changes of matter +energy involved in chemistry

Question 2

Observation

Answer 2

the act of using senses or insterments to gather information about the natural world
ex: the dark colors sank

Question 3

Inference

Answer 3

ex: food coloring was an indicator to how the soap reacts

Question 4

Physical properties ex:

Answer 4

luster, density, color, hardness, melting point, boiling point

Question 5

Chemical properties ex:

Answer 5

flammability, reacts with acid

Question 6

Physical change ex:

Answer 6

mixture, cutting, phase change, dissolving

Question 7

Chemical change ex:

Answer 7

fire, cook, rotting, digesting

Question 8

Chemical change indicators

Answer 8

color change, spontaneous in temp, formation of bubbles or precipitate(insoluble solid)

Question 9

Phase Changes

Answer 9

sublimation (solid to gas), decomposition (gas to solid), freezing, melting, vaporization, condensation

Question 10

What holds two atoms together

Answer 10

chemical bond

Question 11

What can a particle be

Answer 11

a single atom or molecule

Question 12

small subscript on the code

Answer 12

how many atoms of a type in a moloclue

Question 13

Pure Substance

Answer 13

TSq2R, R, Sq2, SqR3

Question 14

CO2

Answer 14

compound

Question 15

Al

Answer 15

element

Question 16

elements are made of

Answer 16

atoms

Question 17

a compound is made of

Answer 17

molecules

Question 18

Another word for homogeneous is

Answer 18

solution

Question 19

pure substances are made of

Answer 19

compound and elements

Question 20

metals ex:

Answer 20

lustrous, good heat conductors, high melting point, high density, malleable

Question 21

non metal ex:

Answer 21

not lustrous, poor heat conductor, brittle solids,

Question 22

theory def

Answer 22

broad and has experiments

Question 23

fact def

Answer 23

observation that is observered over and over

Question 24

hypothesis ex:

Answer 24

If, then.. you can make it testable

Question 25

Law ex:

Answer 25

is math - not broad enough or specific enough

Question 26

matter is anything that

Answer 26

takes up volume and space