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RSM Chp. One

science is the study of the natural world.
observing means using one or more senses to gather information.
inferring explain your observation based on resoning from what you already know.
predicting means making a forecast of what will happen in the future based on past experience or evidence
chemistry is the study of the properties of matter and how matter changes
physics is the study of matter, energy, motion, and forces, and how they interact.
scientific inquiry refers to the different ways scientists study the natural world.
hypothesis is a possible answer to a scientific question or explanation for a set of observations.
parameter is a factor that can be measured in an experiment
manipulated variable one variable parameter is purposely changed
responding variable the variable that is expected to change because of the manipulated .
controlled experiment an investigation in which only one parater is manipulated at a time.
data are the facts, figures, and other evidence gathered through observation
communicating is sharing ideas and conclusions with other through writing and speaking.
model is a picture, diagram, computer image, or representation of an object or process
scientific theory is a well-tested explanation for a wide range of observation or experimental results
scientific law is a statement that describes what scientists expect to happen every time under a particular set of conditions
SI An expanded metric system called International System of Units to measure length, volume, mass, density, temperature, and time.
weight is a mesure of the force of gravity on you
mass is a measure of the amount of matter an object contains
volume is the amount of space an object takes up....measured by length times width times height or by water displacement
meniscus the top surface of the water in the graduated cyclinder
density is mass per unit volume
Celsius scale There are exactly 100 degrees between the freezing point and boiling of fwater.
Kelvin scale is the SI unite of temperature and same size as those on the Celsius scale
absolute zero is the temperature at 0 degrees Kelvin on the Kelvin scale
estimate is an approximation of a number based on resonalbe assumptions.
accuracy referes to how close a measurement is true or actual value
significant figures in a measurement include all of the digits that have been measured exactly, plus one digit whose value has been estimated.
precision is a measure of the exactness of a measurement
graph reveal patterns or trends that words and data tables cannot by bar graphs, circle graphs, and line graphs
horizontal axis or x-axis is the graph line that runs left to right
vertical axis or y-axis is the graph line that runs up and down.
origin the point where the two axes cross.
coordinate is a pair of numbers used to determine the position of a point on a graph
data point the point showing the location of that intersection
line of best fit is a smooth line that reflects the general pattern of a graph
linear graph a line graph in which the data points yield a straight line
slope on a linear graph is the steepness of the graph line. Rise over run tells you how much y changes for every change in x.
nonlinear a line graph in which the data points do not fall along a straight line
reproducibility referes to how close a group of measurements are to each other
Created by: gayledains