Which of the following hypotheses cannot be tested using the scientific method?
cold weather causes car tires to deflate.
if students do more homework their grades will improve.
if the temperature is increased, the reaction rate of hcl and naoh will increase.
the bombing of hiroshima ended world war ii.

Explanation:

[The scientific method includes these steps:

Observation

Hypothesis

Experimentation

Data Analysis

Conclusion]

The first two Hypothesis can be tested with the scientific method, you cannot go back in time and observe or experiment with the bombing of Hiroshima to deduce whether or not it ended World War II.

your answer is c) plasma

~*"auba14"*~

gas

explanation:

smoke is the matter of a gas