Hypothesis

•“If... then... because...”

What was the independent

variable?•A. The ghost shrimp

•B. The type of aquarium

•C. The fish flakes

•D. The type of food

What was the dependent variable?•A. The number of ghost shrimp in

each corner of the aquarium

•B. The way the aquariums were set up

•C. The number of fish flakes

•D. The number of ghost shrimp in each tank

100 mg of caffeine50 mg of caffeine 25 mg of caffeine

100 mg of caffeine50 mg of caffeine 25 mg of caffeine

What was the independent

variable?•A. the number of days it took for

the heads to grow back.

•B. the amount of caffeine in each jar.

•C. the type of jar used.

•D. the location of the jar.

concentration of

Caffiene

mg/L

Time to grow back head (Days)

100

75

50

1 week 2 weeks 3 weeks

15 ml5 ml 10 ml 0 ml

0 ml15 ml10 ml5 ml

What is the dependent variable?

•A. the type of jello

•B. the amount of lemon juice

•C. The time it took for the jello to become hard.

•D. The amount of jello in each jar