Changes in Energy on the Molecular Level Assessment

Which of the following changes made to a sample of liquid would result in an increase in the distance between the individual molecules of the substance?

• Transferring the substance to a smaller container

• 
  Adding heat energy to the substance

• 
  Changing the phase of matter from liquid to solid

• Decreasing the overall kinetic energy of the liquid

Tags

NGSS.MS-PS1-4

A student drew a representation of the atoms of a solid. The illustration shows closely packed atoms vibrating, but remaining in the same relative positions.

Which of the following changes must the student make to the illustration to accurately represent the same substance in the liquid phase?

• • The illustration should show increased movement of the atoms

• 
  Each individual atom should be larger

• There should be very wide spaces between the atoms

• 
  The shape of each atom must reflect the shape of the container

Tags

NGSS.MS-PS1-4

As thermal energy is added to a substance, which of the following changes can be predicted?

• 
  Spacing between particles will decrease

• Vibration of individual particles will increase

• Temperature of the substance will decrease

• The pressure of the air around the substance will increase

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following statements best describes the relationship between temperature and kinetic energy of particles in a substance?

• • As kinetic energy decreases, temperature is not affected

• 
  As kinetic energy increases, temperature decreases

• 
  As kinetic energy decreases, temperature increases

• 
  As kinetic energy increases, temperature increases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Students were asked to draw a concept map of changes in matter at the molecular level. An incomplete sample is provided here.

Which of the following labels would be most appropriate for completing the diagram?

• 
  Arrow A=particles become more tightly packed

• 
  Arrow B=the pressure of the substance increases

• 
  Arrow C= kinetic energy of particles increases

• Arrow D= particles become more widely spaced

Tags

NGSS.MS-PS1-4

Describe the particle structure of liquids.

Tags

NGSS.MS-PS1-4

How are the molecules in a gas different from molecules in other states of matter?

Tags

NGSS.MS-PS1-4

How does adding thermal energy to solid ice affect the molecules in the ice?

Tags

NGSS.MS-PS1-4