Final answer:
The mass of a whole orange is equal to the sum of the masses of the peeled orange and all its slices. When measuring mass, it's accurate to use a balance or a scale since they effectively measure the quantity of matter an object has.
Step-by-step explanation:
The student asked whether the mass of a whole orange is equal to the mass of the peeled orange and all its separate slices. The answer is true. This is because mass is a measure of the amount of matter in an object, and peeling or slicing the orange does not remove any matter, it just separates it. If you measure the mass of the whole orange and then measure the mass of the peel and the slices separately and add those masses together, it will equal the mass of the whole orange, assuming no mass is lost during the process.
When performing experiments with weight and mass, such as measuring the weight of an apple, it's recommended to use a balance or a scale. These instruments will give you an accurate measurement of the mass (or weight under the influence of gravity) of the object.