Experiment Design

The variable that is being tested, counted, or measured and is responding to the independent variable is known as 

• Control
• Constant
• Independent Variable
• Dependent Variable

The variable the is changed on purpose is..

• Constant
• Control
• Independent Variable
• Dependent Variable

During a six week study, one tank of fish is fed once a day, one tank of fish is fed twice a day, and another tank of fish is fed four times a day. The fish's weight are recorded daily. What is the independent variable?

• amount of food

• weight

• type of fish

• number of fish in tank

Tags

NGSS.MS-LS2-1

During a six week study, one tank of fish is fed once a day, one tank of fish is fed twice a day, and another tank of fish is fed four times a day. The fish's weight are recorded daily. What are the controlled variables?

• amount of food

• weight

• type of fish

• number of fish in tank

Tags

NGSS.MS-LS2-1

One sunflower pot is watered with pure water and 3 others are watered with increasing concentrations of salt. The height of the sunflower is measured weekly. What is the independent variable in this experiment?

• Type of water

• Height of sunflower

• Amount of soil

• Amount of salt in water

Three separate hives of bees were allowed to exit their hive and collect pollen at different times of day. At the end of the month, the amount of honey is measured. What is the dependent variable in this experiment?

• Time of day

• amount of honey

• Three different hives

• Amount of bees

Different groups of 7th graders were timed on a math test. One group was allowed to use calculators and one was not. What was most likely being tested in this investigation?

• Battery life of the calculators

• If students knew how to use calculators

• If students with calculators could solve problems faster.

A student is attempting to identify an unknown liquid. She places 10 ml of the liquid in a test tube and begins heating it over a burner. She checks and records the temperature every minute until it begins to boil. What is the independent variable?

• unknown liquid

• temperature

• time

• Boiling temperature

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Two students wanted to find out which of their different toy race cars would go the farthest. They let each car roll down a ramp and then measured how fast the car rolled. Which of these should be held constant if they want a fair test of their cars?

• Height of ramp

• Weight of ramp

• length of the cars

• shape of the cars

Tags

NGSS.MS-PS2-2

Raniyah plants seeds at varying depths. She measures the growth of the plants over the next few weeks and records the data. What is the independent variable of the investigation?

• Depth of seed

• Growth of plants

• Type of soil

• Amount of water