Experimental Design Review

What is the part of the experiment that is left alone or “natural", and is used to compare back to?

• Independent Variable
• Dependent Variable
• Control Group
• Experimental Group 

You will want your experiment to have ____ independent variable(s) in it for the experiment to be valid.

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-5

What is a factor that the experimenter has full control over and changes to see what happens?

• Dependent Variable
• Independent Variable
• Control group 
• Hypothesis

What is a factor that changes because of what the experimenter does?

• Dependent Variable
• Independent Variable
• Control Group
• Hypothesis

Nick wanted to see how high an ice cube would float in different temperatures of water. Identify the DEPENDENT variable
-Amount of water
-Height of Ice cube
-Temperature the ice cube was at its highest height
-Temperature of the water
-Size of the ice cube

• Amount of water 
• Height of Ice cube
• Temperature the ice cube was at its highest height 
• Size of the ice cube

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Mario studied how far room temperature water would spurt out of a plastic milk carton when 3mm holes were punched at different heights from the bottom of the container. Identify the DEPENDENT variable
-3mm holes
-Distant water traveled out of carton
-Different heights of the holes in the container
-Ice water from Iceland

• 3mm holes
• Distant water traveled out of carton
• Different heights of the holes in the container 
• Ice water from Iceland

The following statement is a hypothesis formed about marsh grass: 
If the amount of nitrogen marsh grass receives is increased, then the height of the grass will increase, because nitrogen is an essential nutrient needed for marsh grass to grow.
What is the independent variable of the statement above? 

• Height of grass
• Amount of nitrogen
• Essential nutrient
• Amount of growth

Tags

NGSS.MS-LS1-5

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

Tags

NGSS.MS-LS1-8

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is

• the male alligators
• the incubator
• the gender of the alligator
• the temperature

Tags

NGSS.MS-LS1-5

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The dependent variable is

• the size of the baby alligators
• the gender of the baby alligators
• the incubator
• the temperature

Tags

NGSS.MS-LS1-5