Scientific Foundations Review - 8

A possible explanation to a problem that has not yet been tested. 

• data

• theory

• hypothesis

• fact

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable

• independent variable

• data

• control group

Should experiments be repeated over and over to see if the results are the same each time?

• yes

• no

There are two types of data. Which type of data involves numbers that are obtained by counting or measuring?

• quantitative

• qualitative

There are two types of data. Which type of data involves descriptions that cannot be counted or measured?

• qualitative

• quantitative

In a controlled experiment, how many variables can be worked with at a time? 

• one

• none

• two or more

• how ever many makes sense.

Mr. S. sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp.  Identify the independent variable.

• distance traveled by the ball

• height of the ramp

• mass of the ball

• weight of the ball

Mr. S. sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp.  Identify the dependent variable.

• height of the ramp

•  distance traveled by the ball

• mass of the ball

• weight of the ball

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?

• Type of plant

• Water, apple juice, milk

• Plant growth

• Color of the plant's leaves

The analysis of data gathered during a particular experiment is necessary in order to

• formulate a hypothesis for that experiment

• develop a research plan for that experiment

• design a control for that experiment

• draw a valid conclusion for that experiment