Kinetic Model of Matter

Solids have fixed shapes and volumes, liquids have fixed volumes but not fixed shapes, and gases do not have fixed shapes or volumes.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-4

In Brownian motion, what is inside the glass container?

• vacuum

• air

• smoke

• smoke and air

Why is smoke released into the glass container?

• They are similar to air molecules.

• They are visible through microscope.

• They are to provide energy to the air molecules.

• None of the above.

Smoke particles suspended in air and are moving in a haphazard pattern demonstrate Brownian motion (motion of air molecules)

• TRUE

• FALSE

An increase in temperature results in an increase in the average kinetic energy of the molecules, and hence an increase in the molecules’ average speed.

• TRUE

• FALSE

Tags

NGSS.HS-PS3-2

Gas molecules collide with one another, and therefore exert pressure on the wall of the container.

• TRUE

• FALSE

If the volume of a fixed mass of gas is constant, heating it will result in an increase gas pressure. This is because the gas molecules will collide more vigorously with the walls at a greater frequency.

• TRUE

• FALSE

Decreasing temperature of a fixed mass of gas without changing its pressure will result in a decrease in the volume of the gas.

• TRUE

• FALSE

The pressure of a fixed mass of gas at constant temperature is directly proportional to its volume.

• TRUE

• FALSE

A dented ping pong ball can be fixed by immersing the ball in hot water.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-4