8th Grade Science GMAS Quick Check - Energy & Matter

S8P2.c

According to the law of conservation of energy, what happens to mechanical energy if it is not used to move an object?

• It is converted into another form of energy.

• It is destroyed and cannot be used again.

• It is turned into another substance.

• 
  It is used to make more work.

Tags

NGSS.MS-PS3-5

S8P2.d

A student holds an ice cube in his hand to demonstrate the transfer of thermal energy. In his hand, the ice cubes quickly begin to melt. The ice cubes are shown. Which best describes the process of thermal energy the student is demonstrating?

• The student is demonstrating conduction, where heat is transferred from the ice cubes to his hand.

• The student is demonstrating conduction, where heat is transferred from his hand to the ice cubes.

• The student is demonstrating convection, where heat is transferred from his hand to the ice cubes.

• The student is demonstrating convection, where heat is transferred from the ice cubes to his hand.

Tags

NGSS.MS-PS1-4

S8P5.b

The drawing shows a student holding two negatively charged balloons. What is most likely to occur if the student brings the balloons closer to each other?

• The magnitude of the electrostatic force between the balloons will decrease, and they will attract each other.

• The magnitude of the electrostatic force between the balloons will increase, and they will attract each other.

• The magnitude of the electrostatic force between the balloons will decrease, and they will repel each other.

• The magnitude of the electrostatic force between the balloons will increase, and they will repel each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

S8P5.c

Which type of electromagnetic core will create the strongest magnetic field?

• a wooden pencil

• an iron nail

• another magnet

• a glass rod

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

S8P5.a

A student is investigating with magnets. She places one end of a bar magnet near the end of another bar magnet. The diagram shows her investigation. The student claims that the two magnets have a magnetic field that exists between them. What will occur that will support the student's claim?

• The magnets will repel each other as the closest poles have like charges.

• The magnets will repel each other as the closest poles have opposite charges.

• The magnets will be attracted to each other as the closest poles have like charges.

• 
  The magnets will be attracted to each other as the closest poles have opposite charges.

  
  

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5