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chemistry lesson 1-4 > chemistry lesson 1-4 > Flashcards

chemistry lesson 1-4 Flashcards

1
Q

anything that has mass and takes up space

A

matter

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2
Q

is the study of matter and the changes that it undergoes.

A

chemistry

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3
Q

is the use of evidence to construct testable explanations and predictions. Science is also the knowledge gained from this process.

A

science

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4
Q

Branches of chemistry:

A

-organic chemistry
-inorganic chemistry
-physical chemistry
-analytical chemistry
-biochemistry
-environmental chemistry

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5
Q

a testable explanation of a situation or phenomena is called a

A

hypothesis

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6
Q

an explanation that has been repeatedly supported by many experiments.

A

theory

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7
Q

a ____states a broad principle of nature that has been supported over time by repeated testing (how and why)

A

theory: evolution, relativity, bbt

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8
Q

is a relationship in nature that is supported by many experiments, and no exceptions to these relationships are found. (what)

A

scientific law

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9
Q

is research to gain knowledge for the sake of knowledge itself.

A

pure reasearch

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10
Q

, the study of carbon molecules in space led to the discovery of buckminsterfullerenes.

A

pure research

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11
Q

research undertaken to solve a specific problem.

A

applied research

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12
Q

scientists have developed ways to use buckminsterfullerenes to fight cancer.

A

applied research

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13
Q

a measurement that reflects the amount of matter,

A

mass

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14
Q

a measurement of Earth’s gravitational pull on matter.

A

weight

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15
Q

also called a chemical, is matter that has a definite and uniform composition.

A

substance

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16
Q

-chemistry uses ______ of matter at the submicroscopic or atomic scale to explain the behavior of matter at the macroscopic scale.

A

models

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17
Q

visual representation of something that helps you better understand something. better explain a concept

A

model

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18
Q

Which of these is another word for substance?

A

chemical

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19
Q

a measurement that reflects the amount of matter an object contains

A

mass

20
Q

is a defined unit in a system of measurement that is based on an object or event in the physical world.

A

base unit

21
Q

base units:

A

time, length, mass temperature, amount of substance

22
Q

time-

A

seconds (s)

23
Q

length

A

meter(m)

24
Q

mass

A

kilogram (kg)

25
Q

temperature

A

kelvin (K)

26
Q

amount of substance

A

mole (mol)

27
Q

-A unit that is defined by a combination of base units is called a

A

derived unit

28
Q

The SI unit for speed is meters per second (m/s) is an example of what?

A

derived unit

29
Q

derived unit examples:

A

velocity, acceleration, volume, density

30
Q

-A more common unit of volume is the ______, which equals 1 cubic decimeter (dm3).

A

Liter

31
Q

a physical property of matter defined as the amount of mass per unit volume.

A

density

32
Q

equation for density:

A

density= mass/ volume

33
Q

can be used to express any number as a number between 1 and 10 (the coefficient) multiplied by 10 raised to a power (the exponent).

A

scientific notation

34
Q

is a systematic approach to problem solving that uses conversion factors to move or convert, from one unit to another.

A

dimensional analysis

35
Q

is a ratio of equivalent values having different units.

A

conversion factor

36
Q

refers to how close a measured value is to an accepted value.

A

accuracy

37
Q

refers to how close a series of measurements are to one another. (group of things)

A

precision

38
Q

is defined as the difference between an experimental value and an accepted value.

A

error

39
Q

error equation:

A

error=experimental value-accepted value

40
Q

expresses error as a percentage of the accepted value

A

percent error

41
Q

percent error equation:

A

percent error= error/accepted value x 100

42
Q

The precision of a measurement is indicated by the number of digits reported. The reported digits are called

A

significant figures

43
Q

a visual display of data that makes trends easier to see than in a table.

A

graph

44
Q

examples of graphs:

A

circle, line, bar

45
Q

the variable deliberately changed in an experiment- is plotted on the x-axis.

A

independent variable

46
Q

physically control and manipulate

A

independent variable

47
Q

the value of which changes in response to the independent variable- is plotted on the y-axis.

A

dependent variable

chemistry lesson 1-4 (1 decks)

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