Amy put some salt in a weighing dish. Then she put the weighing dish on a sensitive balance to measure the mass of the salt. She removed the weighing dish from the balance and put it in several similar balances. She recorded the mass each time.

Mass 1 Mass 2 Mass 3 Mass 4 Mass 5
5.608 g 5.607 g 5.608 g 5.608 g 5.609 g

Amy forgot to subtract the mass of the empty weighing dish from her measurements, and she reported the mass of the salt as 5.608 grams.

Amy's measurement of the salt's mass
accurate because
.

Amy's measurement of the salt's mass
precise because
.