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Flashcards in Vocab Deck (25)
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a systematic approach to research

Scientific Method

1

a tentative explanation for a set of observations

Hypothesis

2

a concise statement of a relationship between phenomena that is always the same under the same conditions.

Law

3

a unifying principle that explains a body of facts and/or those laws that are based on them

theory

4

anything occupying space and having mass

matter

5

three states of matter

solid liquid gas

6

change in the form of a substance, not in its chemical composition

physical change

7

a given substance becomes a new substance or substances with different properties and different composition

chemical change

8

____ have variable composition

mixtures

9

having visibly indistinguishable parts; solution

homogeneous mixture

10

having visibly distinguishable parts

heterogeneous mixture

11

a quantitative observations consisting of two parts: number and scale/unit

measurement

12

a digit that must be estimated is called _______

uncertain

13

1.234 has ______ sig figs

4

14

606 has ______ sig figs

3

15

0.08 has ______ sig figs

1

16

2.0 has ______ sig figs

2

17

.0.00420 has ______ sig figs

3

18

The answer to 4.51x3.7777 will have _____ sig figs

3

19

The answer to 6.8/112.04 will have ______ sig figs

2

20

89.332+1.1 will have how many numbers to the right of the decimal

1

21

3.70-2.9133 will have how many numbers to the right of the decimal

2

22

temperature: K=

C+273.15

23

temperature: F=

C*(9/5)+32

24

Density=

mass/volume