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Table 6 Comparison of the LP levels in teachers’ perceptions with students’ actual LPs

From: A tale of two progressions: students’ learning progression of the particle nature of matter and teachers’ perception on the progression

Student performance corresponding to the question

Actual LP level

The level in the teachers’ views

Students believe that particles in solids, liquids, and gases are all scattered

3

3

Students are not aware of the collisions that exist between particles

3

3

Students cannot determine the difference in the interaction forces between particles of solids, liquids and gases based on differences in the voids between the particles

3

3

Students are unable to explain the effects of temperature on macroscopic phenomena in the context of energy and molecular dynamics

3

3

Students believe that the gap between particles can be reduced to 0 and the particles can be pressed tightly together

2

3

Students do not know that there are gravitational and repulsive forces between particles

2

3

The student believes that the particle is moving under the force of other objects

2

2

Students believe that there are no gaps between the particles of an object and that they are close together

2

2

Students cannot simply explain the phenomenon of diffusion from the angle of particles

2

2

Students believe that the particles inside a stationary object do not move

2

2

Students do not know that the higher the temperature, the faster the thermal motion of the molecules

2

2

Students think that particles move only when they are heated

2

2

Students believe that the voids between solid particles, between liquid particles, and between gas particles are the same

2

1

Students believe that the gas particles float in the upper part of the closed container

2

1

Students believe that the change in volume of the same object is due to the change in volume of the particles within the object

2

1

Students believe that matter visible to the naked eye is made up of particles

2

1

Students believe that there are substances other than particles in matter

2

1

Students think that the gas particles sink in the lower part of the closed container

2

1

Students think that the particles move spontaneously in a certain direction

2

1

Students believe that the change in volume of the same object is due to a change in the number of particles within the object

2

1

Students do not understand the size of particles and cannot compare the size of particles and matter

1

2

Students have no idea about particles and believe that matter is a continuous substance

1

2