Experimental Design

An organized way to collect and record scientific observations is with a(n)

• model.

• inference.

• data table.

• operational definition.

Which stage of the scientific process enables a scientist to check the work of other scientists?

• classifying

• concluding

• hypothesizing

• communicating

During an experiment, which factors must be controlled so that researchers can draw a logical conclusion from the experiment?

• variables

• operational definitions

• inquiries

• theories

Observations that deal with descriptions that cannot be expressed in numbers are called

• manipulated observations.

• quantitative observations.

• qualitative observations.

• operational observations.

In a scientific experiment, the responding variable can also be called the

• operational variable

• manipulated variable

• dependent variable

• independent variable

A possible explanation for a set of observations or answer to a scientific question is called a(n)

• predictions.

• hypothesis.

• theory.

• law.

A working model used to test a design is called a

• patent.

• prototype.

• trade-off.

• product.

Observations that deal with a number or amount are called

• manipulated observations.

• quantitative observations.

• qualitative observations.

• operational observations.

The first step in designing or redesigning a product is

• thinking about ways to solve the problem.

• deciding what needs you are trying to meet.

• building a prototype.

• fully researching the problem.

The factor that may change in response to the manipulated variable is called the

• hypothetical variable.

• responding variable.

• operational variable.

• independent variable.