Variables worksheet

for each experiment, write down the independent variable (iv), dependent variable (dv), and control. for some, identify the constants as well.

becky wanted to figure out what type of liquid worked best for growing beans. she watered one with coca-cola, one with lemonade, and one with just water. after one week, she measured how high they had grown.

independent variable (iv):
dependent variable (dv):
control:

jason wanted to find out what fertilizer worked best for growing marigolds. he put miracle grow on one, scotts fertilizer on one, and no fertilizer on another.

independent variable (iv):
dependent variable (dv):
control:

shania wanted to see if eating apples would her do better on her classwork. the first day, she didn’t eat any apples. on day 2, she ate one apple; on day 3, she ate 2 apples; and on day 4, she ate 3 apples. each day, she recorded the grades she got on her science work.

independent variable (iv):
dependent variable (dv):
control:

raekwon wanted to see if listening to music would make the basketball players make more baskets. on day one, he didn’t play any music and counted how many baskets they could make in 10 minutes. on day 2, he played rap music and counted the baskets, and on day 3, he played classical music and counted the baskets.

independent variable (iv):
dependent variable (dv):
control:

jessica wanted to see what kitchen cleaner worked best for cleaning her counters. she used lysol, clorox, pinesol, and just water. for each cleaner, she put 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel.

independent variable (iv):
dependent variable (dv):
control:
constants:

evan wanted to find out what toothpaste made teeth the cleanest. everyday he brushed his teeth with a different product and then took a plaque test to see how much plaque was left. he used crest, colgate, close-up, and water.

independent variable (iv):
dependent variable (dv):
control:
constants:

angelique wanted to find out what shampoo made her hair the shiniest. everyday she washed her hair with different shampoos and then rated how shiny her hair was, on a scale from 1-10. she used pantene, herbal essences, l’oreal, and just water.

independent variable (iv):
dependent variable (dv):
control:
constants:

harrison wanted to find out what soil works best for growing roses. he grew them in potting soil, clay, sand, and soil he found outside his yard. after one week, he measured their height and how many leaves they had.

independent variable (iv):
dependent variable (dv):
control:
constants:

emily wanted to see what battery lasted the longest. she put each battery into a clock and recorded the time that the clock stopped. she used duracell, energizer, kroger brand, and everready.
independent variable (iv):
dependent variable (dv):
control:
constants: