31 terms

Alyssa_DialTEACHER

complex

To be complex is to have many parts.

trend

A trend is the general direction that something tends to move.

sample

A sample is a portion of something that is used to represent the whole thing.

metric system

The metric system is a measurement system based on the number 10.

SI

Modern scientists use a version of the metric system called the International System of Units, or SI.

mass

Mass is a measure of the amount of matter in an object.

weight

Unlike mass, weight is a measure of the force of gravity acting on an object.

volume

Volume is the amount of space an object or substance takes up.

meniscus

To measure the volume of a liquid, read the level at the bottom of the meniscus, or curve.

density

Density is a measure of how much mass is contained in a given volume.

estimate

An estimate is an approximation of a number based on reasonable assumptions.

accuracy

Accuracy refers to how close a measurement is to the true or accepted value.

precision

Precision refers to how close a group of measurements are to each other.

significant figures

The significant figures in a measurement include all digits measured exactly, plus one estimated digit.

percent error

Percent error calculations are a way to determine how accurate an experimental value is.

mean

The mean is the numerical average of a set of data.

median

The median is the middle number in a set of data.

mode

The mode is the number that appears most often in a list of numbers.

range

The range of a set of data is the difference between the greatest value and the least value in the set.

anomalous data

Data that does not fit with the rest of a data set is anomalous data.

graph

A graph is a "picture" of your data.

linear graph

A line graph in which the data points yield a straight line is a linear graph.

nonlinear graph

The kind of graph in which the data points do not fall along a straight line is called a nonlinear graph.

model

In science, a model is any representation of an object or process.

system

A system is a group of parts that work together to perform a function or produce a result.

input

Input is the material or energy that goes into a system.

process

Process is what happens in a system.

output

Output is the material or energy that comes out of a system.

feedback

Feedback is output that changes the system in some way.

safety symbol

Safety symbols alert you to possible sources of accidents in a laboratory.

field

Some of your science investigations will be done in the field, or any area outside a science laboratory.