What are plant growth enhancers?

Hypothesis: If more plant food is added to pond water, then the algae will grow larger, because algae growth d?

• Hypothesis: If more plant food is added to pond water, then the algae will grow larger, because algae growth depends on the nutrients in plant food. Independent variable: amount of plant food added to pond water Dependent variable: amount of algae growth Operational definition: size (in mm) of biggest algae clump Constants: ________________________________________... Also: Hypothesis: If different types of liquids are poured on limestone, then some of them will cause the limestone to dissolve, because some types of solutions react with the compounds in limestone. Independent variable: type of liquid Dependent variable: dissolving of limestone Operational definition: dissolving does or does not occur Constants:

• Answer:

  constants: amount of algae in pond, brand of plant food, amount of sunlight, time you add plant food constant: amount of liquid, size of limestone