Question
Question #1 As part of a study, a scientist observed a number of different molecular changes in matter.Which of the following observations provides evidence of a physical change? A using heat to burn a log in a fireplace B using light to produce sugar in plants C a cake that was baked from many ingredients D a bottle that was broken into many small pleces
Answer
4.3
(228 Votes)
Myfanwy
Elite · Tutor for 8 years
Answer
D. a bottle that was broken into many small pieces
Explanation
A physical change is a change in the state or properties of matter without any accompanying change in its chemical composition. This includes changes such as breaking, melting, freezing, and dissolving. In the given options:- Option A (burning a log) is a chemical change because it involves combustion.- Option B (photosynthesis in plants) is also a chemical change as it creates a new substance (sugar).- Option C (baking a cake) involves chemical reactions where the ingredients produce a new substance.- Option D (breaking a bottle) is a physical change as the composition of the material (glass) remains the same, only its shape changes.