Reassessment on Independent and Dependent Variables

What is a hypothesis?

• A hypothesis is the right answer to an experiment.
• A hypothesis is the wrong answer to an experiment.
• A hypothesis is an educated guess.

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

• conclusion
• procedures
• materials
• responding variable

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 variable in an investigation that you are measuring is the _________________?

• control variable

• independent variable

• dependent variable

• research variable

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 

• Type of fertilizer
• Size of sunflower
• type of sun flower

Penelope wanted to see if the temperature of the oven made cookies softer or harder. What is the dependent variable.

• Hardness of cookie
• Type of oven
• Temperature of oven

Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. What is the dependent variable.

• Color or chair
• Grade on test
• Age of students

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the dependent variable 

• Type of fertilizer
• Size of sunflower
• Type of sunflower

A variable that remains constant, or does not change in an investigation?

• control variable

• dependent variable

• independent variable

• research variable

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion