PS Module 1

Question 1

physical science

Answer 1

the study of the structure of the earth as well as its place in the solar system

Question 2

atom

Answer 2

the smallest chemical unit of matter

Question 3

molecule

Answer 3

two or more atoms linked together to make a substance with unique properties

Question 4

element

Answer 4

substances made of billions and billions and billions of the same atom

Question 5

compound

Answer 5

substances made of billions and billions and billions of molecules

Question 6

mixture

Answer 6

substances we see (i.e. cereal, plastics, woods) which are composed of several different substances, each of which is made up of either atoms or molecules

Question 7

unit

Answer 7

a definite magnitude of a physical quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same physical quantity

Question 8

metric system

Answer 8

a standard set of units that will be used by everyone

Question 9

mass

Answer 9

how much matter exists in an object

Question 10

slug

Answer 10

in the English system, the base English unit for mass

Question 11

gram

Answer 11

in the metric system, the base metric unit for mass

Question 12

foot

Answer 12

in the English system, the base English unit for distance

Question 13

meter

Answer 13

in the metric system, the base metric unit for distance

Question 14

gallon

Answer 14

in the English system, the base English unit for volume

Question 15

litre

Answer 15

in the metric system, the base metric unit for volume

Question 16

second

Answer 16

in the English system, the base English unit for time

Question 17

second

Answer 17

in the metric system, the base metric unit for time

Question 18

Newton

Answer 18

in the English system, the base English unit for weight

Question 19

factor-label method

Answer 19

the sequential application of conversion factors expressed as fractions and arranged so that any dimensional unit appearing in both the numerator and denominator of any of the fractions can be cancelled out until only the desired set of dimensional units is obtained

Question 20

Celsius

Answer 20

the unit scientists use when measuring temperature, sometimes called the “centigrade” temperature scale

Question 21

concentration

Answer 21

the quantity of a substance within a certain volume