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- Padua Academy High School
- Honors Chemistry
- Fundakowski
- Chapter 1 Test

Emily E.

How is a mixture that is the same throughout classified?

Homogeneous (solution)

How is a mixture that has visible evidence of multiple components classified?

Heterogeneous

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What is a particle?

A single unit of a substance: either one atom or two or more chemically bonded atoms.

What is the official measurement system of the scientific community?

International System of Units (SI)

What are the advantages of SI?

It is both a metric (size of units goes up or down by powers of ten) and a decimal (fractional units expressed in decimals) system.

What are the seven fundamental physical quantities which can be measured, and what are the units used to measure them?

Length (meter), mass (kilogram), temperature (Kelvin), time (second), amount of substance (mole), electric current (ampere), luminous intensity (candela)

All measurements are defined by a conceptual definition except which?

Kilogram

What are the benefits of conceptual definitions for measurement?

The natural phenomenon which describes them can be replicated and cannot be destroyed.

What are the problems with a standard unit definition for measurement?

There is only one standard unit, and all others are copies. In addition, the standard unit could be destroyed.

What is the metric conversion table?

Giga > Mega > kilo > hecto > deka > base unit > deci > centi > milli > micro > nano

What is the formula for converting Celsius to Fahrenheit?

°F = 1.8 (°C) + 32

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What is the formula for converting Fahrenheit to Celsius?

°C = (°F - 32) / 1.8

What is the formula for converting Celsius to Kelvin?

K = °C + 273.15

Which do scientists prefer, quantitative or qualitative measurement?

Quantitative; it is easy to agree upon and there is no personal bias.

What is the accuracy of a measurement based upon?

How close the measurement is to the actual or accepted value

What is the precision of a measurement based upon?

How well the measurement can be repeated

What is the difference between accuracy and precision?

Accuracy can be true of an individual measurement or the average of several measurements; precision requires several measurements to be determined.

In what situations do zeros count as significant figures?

When zeros are between other significant figures or at the end of a number after the decimal point, they count as significant figures.

In what situations do zeros NOT count as significant figures?

Zeros that are at the end of a number before an understood decimal point or before the first nonzero digit in a number smaller than one DO NOT count as significant figures.

What rule must be followed when adding or subtracting significant figures?

Your answer cannot be better than your worst estimate.

What rule must be followed when multiplying or dividing significant figures?

Your answer must have the same number of significant figures as the least in the question.

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