After Notes.Scientific Method

In this experiment we first calculated the speed of a "normal" balloon rocket. This is known as a ​ (a)   and is used as a basis for ​ (b)   for the tested variable.

​ ​ ​

• control group
• comparison
• variable

Which of the following are testable questions?

• How does a rocket work?

• Does fertilizer help plants grow bigger?

• Does heart rate increase with exercise?

• Does the freezing point of water change at different elevations?

What skill is a scientist using when she listens to the sounds that an elephant makes?

• drawing conclusions
• making observations
• interpreting data
• making a hypothesis

Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person’s pulse was taken before the music and then after each 30-second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person’s pulse rate changed when the person listened to different types of music.  Which component is missing from Carmen’s experiment?

• a question
• a hypothesis
• a control group
• a description of the experiment

The summary at the end of an experiment that explains the results. 

• conclusion
• procedures
• materials
• responding variable

A possible explanation to a problem that has not yet been tested. An if, then, statement.

• data

• theory

• hypothesis

• fact

What is the scientific method?

• A systematic procedure for how to conduct a scientific experiment

• The process of solving a problem

• A way of making non-scientific observations

• A way to summarize findings from multiple investigations

Variable that is changed on purpose, also known as the "cause".

• Dependent Variable

• Independent Variable

• Hypothesis

• Research

Josie was performing an experiment where she grew the same kind of tomatoes in the same soil and amount of water.  She sat one in the sun and one in a closet for 14 days.  What is the independent variable in Josie's experiment?

• tomatoes
• soil
• sunlight
• water

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

• one
• none
• two or more
• how ever many makes sense.