Question

Which of the following hypotheses cannot be tested using the scientific method

Answer 1

I believe it's answer #3. Logically, at least.

You can test #1 through trial and error.
You can experiment #2 also through trial and error.
You cannot test #3 through trial and error, because that would be catastrophic.
You can test #4 through a survey and individual study and data collection.

Answer 2

Answer: The bombing of Hiroshima ended World War II is correct.

Explanation:

Using the scientific method, we can check :

1) If the temperature is increased, the reaction rate of HCl and NaOH will increase.

2) Cold weather causes car tires to deflate.

3) If students do more homework their grades will improve.

All the above can done by carefully observing the data.

But the The bombing of Hiroshima ended World War II cannot be tested by scientific method.

Because it is based on pre determined outcome but scientific method is not.

Hence, The bombing of Hiroshima ended World War II is correct.