Question

The purpose of this study was to determine the negative effects of triclosan - an antibacterial chemical commonly found in soap - on marine crustaceans. To do this, lobsters were exposed to one of four treatments: 1) 5 ml triclosan mixed into seawater, 2) 15 ml triclosan mixed into seawater, 3) 25 ml triclosan mixed into seawater, and 4) seawater only (no chemicals added). Lobster swimming speed was measured 24 hours following treatment exposure.

Use the above information to match the components of the experiment to the correct vocabulary below.

Each vocab word will be used once or not at all.

	Triclosan will alter lobster swimming speed
	Lobster swimming speed
	Water in the 5 ml triclosan tanks was 2 degrees Celsius cooler than water in the other tanks
	Type of scientific study conducted
	Triclosan will negatively impact lobster fitness
	0 ml triclosan treatment
	Triclosan concentration

1.	Independent variable
2.	Dependent variable
3.	Control treatment
4.	Confounding factor
5.	Manipulative experiment
6.	Observational study
7.	Replicate
8.	Null hypothesis
9.	Alternative hypothesis
10.	Study hypothesis

Answer 1

Answer-

Triclosan will alter lobster swimming speed- study hypothesis
dependent variable	Lobster swimming speed
confounding factor-	Water in the 5 ml triclosan tanks was 2 degrees Celsius cooler than water in the other tanks
observational study-	Type of scientific study conducted
alternative hypothesis-	Triclosan will negatively impact lobster fitness
control treatment-	0 ml triclosan treatment
independent variable-	Triclosan concentration