physical science chapter 1

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created 6 years ago by mara
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science skills
updated 6 years ago by mara
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1

science

system of knowledge and methods you use to find that knowledge

2

technology

use of knowledge yo solve practical problems

3

chemistry

study of the composition, structure, properties, and reactions of matter

4

physics

study of matter and energy and the interactions between the two through forces and motion

5

geology

study of the origin, history, and structure of earth

6

astronomy

study of the universe beyond earth, including the sun, moon, planet, and stars

7

biology

study of living things

8

scientific method

organized plan for gathering, organizing, and communicating information

9

observation

information that you obtain through your senses

10

hypothesis

proposed answer to a question

11

manipulated variable

variable that causes change in another

12

responding variable

variable that changes in response to the manipulated variable

13

controlled experiment

experiment in which only one variable, the manipulated variable, is deliberately changed at a time

14

scientific theory

well tested explanation for a set of observations or experimental results

15

scientific law

statement that summarizes a pattern found in nature

16

model

representation of an object or event

17

scientific notation

expressing a value as the product of a number between 1 and 10 and a power of 10

18

length

straight line distance between two points

19

mass

quantity of matter in an object or sample

20

volume

amount of space taken up by an object

21

density

ratio of an object's mass to its volume

22

density

mass divided by volume

23

conversion factor

ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit

24

precision

gauge of how exact a measurement is

25

significant figures

all the digits that are known in a measurement, plus the last digit that is estimated

26

accuracy

closeness of a measurement to the actual value of what is being measured

27

thermometer

instrument that measures temperature or how hot an object is

28

slope

steepness of a line

29

slope

rise over run

30

direct proportion

relationship in which the ratio of two variables is constant

31

inverse proportion

relationship in which the product of two variables is a constant