Understanding Particle Motion and Pure Substances

Fill in the Blank: In a (a)   , particles vibrate around fixed positions but do not move freely.

Fill in the Blank: A (a)   is made up of only one type of atom or molecule.

Fill in the Blank: As (a)   increases, particle motion increases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Fill in the Blank: (a)   is the total kinetic energy of all particles in a substance.

Tags

NGSS.MS-PS3-4

Fill in the Blank: In a (a)   , particles move freely and randomly in all directions.

Tags

NGSS.MS-PS1-4

What type of particle motion is observed in a liquid?

• Vibrate in place

• Move freely and randomly

• Slide past each other

• Fixed in an orderly arrangement

Which of the following is an example of a pure substance?

• Saltwater

• Air

• Gold

• Sand

What happens to the motion of gas particles as temperature increases?

• Decreases

• Increases

• Remains the same

• Stops

Tags

NGSS.MS-PS1-4

Which of the following is related to the total kinetic energy of all particles in a substance?

• Temperature

• Mass

• Thermal energy

• Density

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What holds the particles together in a solid?

• Weak intermolecular forces

• Strong intermolecular forces

• No intermolecular forces

• Random motion