Lucas wants to find out which frozen solid melts the fastest: soda, ice or orange juice. He pours each of the three liquids into empty cubes of ice trays, and then places the ice trays in the freezer over night. The next day, he pulls the various types of ice out and sets each cube on its own plate. He then waits and watches for each of them to melt. When the last part of the frozen liquid melts, he records the time. IV:
DV:
CV:
Constant (s):
Hypothesis:

Alexis wants to find out which laundry detergent cleans the best. So, he takes a cotton sheet and cuts it up into equal squares. He stains four squares with chocolate and four with grape juice. He washes one of each of the squares in each of the 3 detergents. One from each set of squares is washes in water alone. For each wash load, he used: the same amount of water, the same amount of detergent and the same temperature of water.
IV:
DV:
CV:
Constant (s):
Hypothesis:

Ray wants to find out whether or not Miracle Grow really makes plants grow faster. She takes two identical pots, puts 1/2 cup of dirt into each one. Puts 3 pea plant seeds in each one, and tops each off with 1/2 cup more dirt. She waters the plants the same amount at the same time each day. The only differences is that one plant is watered with regular water, while the other is watered with water that has Miracle Grow in it.
IV:
DV:
CV:
Constant(s):
Hypothesis