Question

Bart believes that mice exposed to microwaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found that 8 out of 10 of the microwaved mice were able to push the block away. 7 out of 10 of the non-microwaved mice were able to do the same.

Identify the-

1. Control Group

2. Independent Variable

3. Dependent Variable

4. What should Bart's conclusion be?

5. How could Bart's experiment be improved?

Answer 1

1.mice not exposed to microwaves
2.Mice exposed to microwaves
3.if the microwave made the mice stronger
4.Overall, the data shows that the microwaved mice were able to move the block, although some mice that weren't microwaved could too they not all of them did. So Bart's hypothesis was correct, mice that have been microwaved are extra strong.
5.To improve his experiment, Bart can add more trials to make sure that his data is correct and include more mice in the trials.

Answer 2

An experimental design must contain three variables: variable to be studied (dependent variable), a variable which can be manipulated (independent variable) and the variable which is kept constant (constant variable).

The experimental samples are categorized into two groups: the experimental group om which experiment is performed and the control group on which the independent variable is missing.

Therefore in the given question: The study was conducted to study the effect of microwaves on mice, so the

1. Independent Variable - the variable to be studied strength of mice.

2. Dependent Variable - the variable which can be manipulated in 10 seconds (time).

3. Control Group- the samples which lack microwave radiation that is mice not exposed to microwave.

4. Bart's conclusion is- microwaves do not affect the strength of the mice as the experimental mice pushed the block nearly the same to the control group.

5. Improvement- The experiment can be improved by taking a large sample size to reduce the error.