Science Assessment ~ Topics ~ Atoms, Molecules, and States of Matter ~ Misconception AMM003

A gas is not a substance with weight and mass, therefore a gas is not matter (Mitchell et al., 1984; Mas et al., 1987; Renstrom et al., 1990; Stavy, 1990, 1991; Lee et al., 1993). For example, students may believe that air is not made up of atoms (AAAS Project 2061, n.d.).

Items that test for misconception AMM003 in this project (THSB) and key idea ()
Item ID Number	Item Description	How Often the Misconception was Chosen	Select This Item for My Item Bank
SB002002	During a reaction where a reactant enters the system and no products leave, the mass of the system increases because the system now contains more atoms.	13%