According to the results of the pillbug experiment

According to the results of the pillbug experiment,

• pillbugs prefer a wet environment.

• pillbugs tend to prefer cornstarch over sand.

• pillbugs tend to prefer sand over cornstarch.

• pillbugs did not show a preference when given a choice of substrate.

• The results of the experiment did not allow me to draw any conclusions about pillbug preferences.

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. Which is a good hypothesis for this tadpole experiment?

• Tadpoles will be larger if the pH is higher.

• Tadpoles will be larger if fed a meat-based diet.

• Tadpole size will be unpredictable if fed a meat-based diet.

In the pillbug experiment, if the pillbugs in the experimental chamber would have moved to the side of the chamber with sand instead of cornstarch, what would you have concluded?

• Pillbugs tend to prefer sand over cornstarch.

• Pillbugs tend to prefer cornstarch over sand.

• Pillbugs did not show a preference when given a choice of substrate.

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. What is the independent variable for the tadpole diet experiment?

• lab conditions

• species of tadpole

• tadpole size

• diet

If the hypothesis in a scientific experiment is not supported, the experiment is considered a complete failure and must be repeated until a satisfactory outcome is reached.

• True

• False

When measuring the volume of water in a graduated cylinder it is important that your eye is parallel to the meniscus.

• True

• False

1 milliliter is equal to 0.001 liters.

• True

• False

In the weight exercise of the metric system lab, what object/materials did you practice weighing?

• beaker and salt

• beaker and sugar

• flask and salt

• sugar and salt

• flask and sugar

One gram is equal to 0.0022 pounds.

• True

• False

A buffer can

• quickly denature an enzyme.

• resist changes in pH by binding with hydrogen and hydroxyl ions.

• cause the pH of a substance to fluctuate wildly.

• cause a generally acidic substance to become basic very quickly.

• There is no way to predict the effect of a buffer on pH.