Variable Review

Description: Three identical plants are placed in the same type of pot with the same amount of soil. Plant A is watered every day, Plant B is watered every other day, and Plant C is watered once a week. The height of each plant is measured after two weeks. What is the test variable?

• watering frequency

• height of the plants after 2 weeks

• type of plant, type of pot, amount of soil, sunlight, duration

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Description: Three identical plants are placed in the same type of pot with the same amount of soil. Plant A is watered every day, Plant B is watered every other day, and Plant C is watered once a week. The height of each plant is measured after two weeks. What is the control variable?

• watering frequency

• Height of the plants after two weeks

• Type of plant, type of pot, amount of soil, amount of sunlight, duration of the experiment

Description: Three different brands of paper towels are tested to see which one absorbs the most water. Each paper towel is dipped into a cup of water for 10 seconds, and the amount of water absorbed is measured. What is the outcome variable?

• Brand of paper towel

• Amount of water absorbed by each paper towel

• Amount of water, dipping time, size of paper towel pieces

Description: Three different brands of paper towels are tested to see which one absorbs the most water. Each paper towel is dipped into a cup of water for 10 seconds, and the water absorbed is measured. What is the test variable?

• Brand of paper towel

• Amount of water absorbed by each paper towel

• Amount of water, dipping time, size of paper towel pieces

Tags

NGSS.MS-ETS1-3

Description: Iron, copper, and aluminum nails are placed in water for one week. The amount of rust formed on each nail is observed and recorded. What is the outcome variable?

• 
  

• Amount of water, size of nails, duration of the experiment, environmental conditions

• Amount of rust formed on each nail

• Type of metal (iron, copper, aluminum)

Tags

NGSS.MS-PS1-2

Description: Iron, copper, and aluminum nails are placed in water for one week. The amount of rust formed on each nail is observed and recorded. What is the test variable?

• 
  

• Amount of water, size of nails, duration of the experiment, environmental conditions

• Amount of rust formed on each nail

• Type of metal (iron, copper, aluminum)