Question

a student wants to find out if salt affects the freezing point of water. which would be the best way to test this? freeze plain water and salty water, then compare temperatures ask a friend for the answer read about it in a book guess the answer

Explanation:

Step1: Analyze the nature of the question

The student wants to test an experimental - based hypothesis about the effect of salt on water's freezing point.

Step2: Evaluate each option

• Freezing plain water and salty water and comparing temperatures is an experimental approach which directly tests the hypothesis.
• Asking a friend is not a reliable scientific method.
• Reading about it in a book is passive learning and not a direct test.
• Guessing the answer is not scientific.

Answer:

Freeze plain water and salty water, then compare temperatures