You Perform an Experiment in Which You Take 16 Pots

question 32

Multiple Choice

You perform an experiment in which you take 16 pots of strawberry plants and give half of them 1 gram of ammonium nitrate per liter of water and the other half receive only water. Each group is then split in half again, and exposed to either 8 or 16 hours of light each day. You monitor the height of the plants for 4 weeks. You observe that plants grown in ammonium nitrate and 16 hours of light grow taller than no ammonium nitrate and 8 hours of light.
-In this experiment,the size of the pot is

• A) an independent variable.
• B) a dependent variable.
• C) a standardized variable.
• D) a placebo.
• E) a control.

---

Definitions:

Receptor Cells

Specialized cells found in the sensory organs that respond to specific stimuli like light, sound, or chemicals, and send signals to the brain.

Semicircular Canals

Structures within the inner ear that are key to maintaining balance and spatial orientation by detecting head rotations.

80-Decibel Sound

A sound intensity level; equivalent to the loudness of city traffic or a telephone dial tone.

60-Decibel Sound

A measure of sound intensity, corresponding to moderate levels of noise similar to background music or conversation in a restaurant.