Variables in Biology

The things that are kept the same to ensure the results are due to the experiment is called..

• Control
• Constant
• Independent Variable
• Dependent Variable

Tags

NGSS.MS-PS2-2

The variable that is changed on purpose is..

• Constant

• Control

• Independent Variable

• Dependent Variable

What is the INDEPENDENT  variable (cause) is this experiment? 
"Which type of medium is best for plant growth?" 

• height of plant (cm)
• type of medium (soil vs. sand)
• amount of medium
• types of plant

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is the DEPENDENT variable (effect) in this experiment?

"Does eating breakfast improve test score?"

• eating breakfast or not

• the grade you got on the test

• what time you get up in the morning

• how tasty the breakfast is

What is the INDEPENDENT variable (cause) in this experiment?

"Will fish school (get in a group) more if a predator is present?"

• whether there is a predator or not

• number of fish school together

• type of predator

• type of fish

Tags

NGSS.MS-LS2-2

What is the DEPENDENT variable (effect) in this experiment?
"Do tall people jump further than short people?"

• height of the person
• weight of the person
• how fast the person runs
• how far the person jumps

Tags

NGSS.MS-PS2-2

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, the independent variable is ...

• The type of plant
• The amount of sunlight
• The type of music
• The type of liquid

Tags

NGSS.MS-LS1-5

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

Tags

NGSS.MS-LS2-1

My biology class takes four samples of the soil and changes the pH level of each soil sample by adding chemicals. We plan to measure the height of the plants at each pH. Which is a constant in this scenario?

• same organic soil

• plant height

• same type of plant

• pH level of soil

• same amount of sunlight

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more than one
• It keeps the experiment fair and you can see what caused the change
• It is what has always been done
• It makes the results better in an experiment

Tags

NGSS.MS-PS2-2