Chapter 1 Review Quiz

[blank_start]Physics[blank_end] is the study of matter and energy and their relationships

[blank_start]Dimensional analysis[blank_end] is used to check that an answer will be in the correct units.

The result of any mathematical operation with measurements never can be more precise than the [blank_start]least-precise[blank_end] measurement involved in the operation

The scientific method is a systematic method of [blank_start]observ[blank_end]ing, [blank_start]experiment[blank_end]ing, and [blank_start]analyz[blank_end]ing to answer questions about the natural world

Scientific ideas [blank_start]change[blank_end] in response to new data

New scientific findings must be [blank_start]reproducible[blank_end]; that is, others must be able to [blank_start]measure[blank_end] and find the same [blank_start]results[blank_end]

All measurements are subject to some [blank_start]uncertainty[blank_end]

[blank_start]Precision[blank_end] is the degree of exactness with which a quantity is measured. Scientific notation shows how [blank_start]precise[blank_end] a measurement is

[blank_start]Accuracy[blank_end] is the extent to which a measurement matches the true value.

Data are plotted in [blank_start]graphical[blank_end] form to show the relationship between two variables

The line that best passes through or near graphed data is called the [blank_start]line of best fit[blank_end]. It is used to describe the data and to predict where [blank_start]new data[blank_end] would lie on the graph.

A graph in which data points lie on a straight line is a graph of a [blank_start]linear[blank_end] relationship.

The equation for a linear relationship is [blank_start]y=mx+b[blank_end]. In the general equations, m and b are [blank_start]constants[blank_end].

The slope of a straight-line graph is the [blank_start]vertical[blank_end] change ([blank_start]rise[blank_end]) divided by the [blank_start]horizontal[blank_end] change ([blank_start]run[blank_end]) and often has a physical meaning

The equation for slope is [blank_start]m[blank_end] = [blank_start]rise[blank_end]/[blank_start]run[blank_end].

The graph of a quadratic relationship is a parabolic curve. It is represented by the equation [blank_start]y[blank_end] = [blank_start]ax[blank_end]^2 + [blank_start]bx[blank_end] + [blank_start]c[blank_end]. The constants a, b, and c can be found with a computer or a graphing calculator; simpler ones can be found using algebra

The graph of an inverse relationship between x and y is a [blank_start]hyperbolic[blank_end] curve. It is represented by the equation y=[blank_start]a[blank_end]/[blank_start]x[blank_end], where a is a constant