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# Science Ch. 1 Vocab

### The vocabulary words for chapter 1 in the Physical Science book.

TermDefinition
science study natural world
observing use senses to get info
inferring explain observations
predicting make forecast of what will be in the future based on past events
chemistry study of matter and how it changes
physics study matter of energy, motion forecast, and how they interact
scientific inquiry different ways scientists study the world
hypothesis possible answer to scientific inquiry
parameter factor that can be measured in an experiment
manipulated variable purposely changed variable
responding variable respond to manipulated variable
controlled experiment an investigation that only has one manipulated variable
data facts, figures, and other evidence gathered through observations
communicating share info about experiments with others
model picture or image of object or process
scientific theory well tested explanation
scientific law rule of nature (ex. law of gravity)
SI international system of units
weight a measure of the force of gravity on you
mass a measure of the amount of matter an object contains
volume the amount of space an object takes up
meniscus the curved top surface of the water in the graduated cylinder
density mass per unit volume
Celsius scale water freezes at 0 degrees and water boils at 100 degrees
Kelvin scale the SI temperature scale
absolute zero 0 K on the Kelvin scale, nothing can get colder than this, -273 degrees on the Celsius scale
estimate an approximation of a number based on reasonable assumptions
accuracy how close a measurement is to the true or actual value
reproducibility how close a group of measurements are to each other
significant figures all of the digits that have been measured exactly
precision a measure of the exactness of a measurement
graph a picture of your data
horizontal axis the graph line that runs left to right
vertical axis the graph line that runs up and down
origin the point where the two axes cross
coordinate a pair of numbers used to determine the position of a point on a graph
data point the point showing the location of where two lines cross
line of best fit 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 the steepness of the graph line
nonlinear graph a line graph in which the data points do not fall along a straight line
Created by: yosf