Chapter 1 Vocabulary Cards Flashcards
A bias occurs when what the scientist expects changes how the results are viewed.
bias
A factor that does not change when other variables change is called a constant.
constant
A control is the standard by which the test results can be compared
control
Density is the mass per unit volume of a material. You find density by dividing an object’s mass by the object’s volume.
density
A dependent variable’s value changes according to the changes in the other variables.
dependent variable
An experiment tests the effect of one thing on another using controlled conditions.
experiment
A graph is a visual display of information or data.
graph
A hypothesis is a possible explanation for a problem using what you know and what you observe.
hypothesis
The variable you change to see how it will affect the dependent variable is called the independent variable.
independent variable
Mass is a measurement of the quantity of matter in an object.
mass
A model represents an idea, event, or object to help people better understand it.
model
A scientific law is a statement about what happens in nature and that seems to be true all the time.
scientific law
An organized set of investigation procedures is called a scientific method.
scientific method
In 1960, an improved version of the metric system was devised. Known as the International System of Units, this system is often abbreviated SI. All SI standards are universally accepted and understood by scientists throughout the world.
SI (International System of Units)
A standard is an exact quantity that people agree to use to compare measurements.
standard
