Test 1 Vocab

Question 0

Hypothesis

Answer 0

Tentative interpretation or explanation of the observations

Question 1

Observation

Answer 1

Measurement of some aspect of nature

Question 2

Experiments

Answer 2

Highly controlled observations

Question 3

Theory

Answer 3

One or More well established hypotheses may form the basis for a scientific theory

Question 4

Matter

Answer 4

Anything that occupies space and has mass

Question 5

Atoms

Answer 5

Submicroscopic particles that are the fundamental building blocks of matter

Question 6

Molecules

Answer 6

Two or more atoms joined to one another in specific geometric arrangements

Question 7

Crystalline

Answer 7

Atoms or molecules arranged in geometric patters with long-range, repeating order.

Question 8

Amorphous

Answer 8

Atoms or molecules don’t have long range repeating order

Question 9

Pure substance

Answer 9

One type of atom or molecule

Question 10

Mixture

Answer 10

Two or more different types of atoms or molecules combined in variable proportions

Question 11

Element

Answer 11

Substance that can’t be broken down into simpler substances

Question 12

Heterogeneous mixture vs. homogeneous mixture

Answer 12

Hetero: such as crunchy peanut butter, composition varies from one region to another

Homo: such as sweetened tea, composition is the same throughout

Question 13

Physical property

Answer 13

One that a substance displays without changing it’s composition

Question 14

Chemical property

Answer 14

One that a substance displays only through changing it’s composition

Question 15

Physical change

Answer 15

Matter changes it’s appearance but not it’s composition.

Usually no new substance

Question 16

Chemical change

Answer 16

Matter does change it’s composition.

Usually a new substance is involved

Question 17

Physical change vs chemical change

Answer 17

Physical change results in a different form of the substance while a chemical change results in a completely new substance.

Question 18

Volatile in chemistry

Answer 18

More easily vaporizable

Question 19

Distillation

Answer 19

Heat mixture to boil off liquid

Question 20

Decanting

Answer 20

Carefully pouring off