Ch 1

Question 1

Law

Answer 1

Consistent set of observations( no explanation of why. Only how)

Question 2

Hypothesis

Answer 2

Explanation on why

Question 3

Matter

Answer 3

Anything with volume and mass

Question 4

Physical property

Answer 4

Color. Mp. Bp. Hardness. Thermal and electrical conductivity.

Question 5

Chemical prop

Answer 5

How a material undergoes chemical change. Flammability. Corrosivity. Acidity. Basicity.

Question 6

Chemical change

Answer 6

Transformation of 1 or more atoms or molecules into one or more diff molecules.

Question 7

Elements

Answer 7

Substances can’t be broken down into simpler substances by either physical or chemical means.

Question 8

Compounds

Answer 8

Substances containing 2 or more elements (break down chemically but not physically)

Question 9

Heterogenous

Answer 9

Keep forming physical separations until no

Longer separates anything

Question 10

Amorphous

Answer 10

Atoms have no longneck term order or range

Question 11

Microscopic

Answer 11

Atoms and molecules

Question 12

Macroscopic

Answer 12

Pure or mixture

Question 13

Filtration

Answer 13

Solid in liquid but don’t know if either is pure yet so you do distillation

Question 14

Distillation

Answer 14

Uses physical property observations; Lowe bp will evaporate faster.

Question 15

Intensive

Answer 15

Independent on amount of substance ( mp. Bp. Temp. Concentration. Density. )

Question 16

Extensive

Answer 16

Dependent on amount of substance. ( mass and volume)

Question 17

Accuracy

Answer 17

How close to the true value

Question 18

Precision

Answer 18

How close your measurements are together.

Question 19

Sig fig add and subtracting

Answer 19

Fewest digits right of decimal is how many dig figs in final answer

Question 20

Mult. And division sig fig

Answer 20

Least number in any factor

Question 21

Logs and antiogs sig fig

Answer 21

However many are in the mantisa( end of starting #) is how many sig figs.

Question 22

Molecule

Answer 22

Multiple atoms put together/ diff combos of atoms