Scientific Investigations

Sometimes scientists observe something in nature over time. That is one kind of study. Another kind is a carefully controlled test called an _____.

• experiment

• inference

• unscientific observation

• qualitative observation

An ________ is a careful study of something to try to answer a question about it.

• inference

• prediction

• investigation

• quantitative

A _____ is an inference about what will happen in the future.

• graduated cylinder

• quantitative observation

• prediction

• unscientific observation

_____ a carefully controlled test.

• experiment

• inference

• prediction

• matter

A _____ is anything that can change, or vary, in an experiment.

• pan balance

• scientific observation

• inference

• variable

_______________ are factors that a scientist keeps the same in all parts of an experiment.

• unscientific observation

• controlled variables

• data

• tools

A_____ is a factor that a scientist changes in different parts of an experiment.

• data

• scientific observation

• manipulated variable

• controlled variable

A _____ is a factor that may change when the manipulated variable is changed.

• controlled variable

• responding variable

• manipulated variable

• experiment

It is important to change only _____ factor in an experiment.

• 2

• 1

• 5

• 3

A _____ is an experiment in which only one factor is changed or tested.

• fair test

• responding variable

• data

• inference