Question

a rock that was found during the moon landing in 1969 was brought back to earth to be studied. on the moon, the mass was 19 grams. select the option that answers the question: would the mass be different when scientists studied it on earth? yes, if the rock weighs more or less than matter must have been added or removed resulting in a change of the rocks mass. no, it is still the same size, looks the same and did not gain or lose any matter, it just has less gravity pulling on it, so it weighs less.

Explanation:

Step1: Define mass concept

Mass is amount of matter in object.

Step2: Analyze rock's matter

Rock on moon and Earth has same matter.

Step3: Consider gravity effect

Gravity affects weight not mass. Rock weighs less on moon due to lower gravity but mass remains 19 grams on Earth too.

Answer:

No, it is still the same size, looks the same and did not gain or lose any matter, it just has less gravity pulling on it, so it weighs less.