SCIENCE
PHYSICAL SCIENCES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The mass
|
|
|
The weight
|
|
|
The shape
|
|
|
The shape and the mass
|
Detailed explanation-1: -It’s a physical change. The sugar molecule remains intact when it dissolves. Chemical changes are those where the molecule itself changes, glucose being converted into carbon dioxide and water, for example.
Detailed explanation-2: -Answer and Explanation: This is a physical change. Grounding up sugar does not change the identity of sugar.
Detailed explanation-3: -Sugar cubes are small lumps of sugar shaped into cubes.
Detailed explanation-4: -The phenomenon you are witnessing is called triboluminescence. When you crush a lump of sugar, you are fracturing sugar crystals. Although the sugar molecules form an orderly arrangement, the crystals are slightly asymmetric. This allows positive and negative charges to separate from each other as the crystal cracks.