Answer: 4) Fabreeze neutralizes air odor for 12 hours
Explanation: This hypothesis is sweet and short and to the point but also very concise in that it states that Fabreeze will neutralize air odor, and for the duration of 12 hours. This is a testable hypothesis with a testable variable, how long the odor is neutralized making this the best hypothesis in this list.
These sorts of studies can help researchers determine the relative importance of nurture and nature in determining a trait. Nature here would refer to genetics passed down to an individual from its parents, whereas nurture refers to the environment the individual is exposed to.
We can change a material into its other states by heating it up or cooling it down. For example, water is a liquid at room temperature. If we cool it down, it changes into a solid – ice. If we heat it up, it changes into a gas – steam.
A fern growing from a prothallus