Unit 3: Thermal Energy, Heat, Temperature

When you touch something that feels cold, 

• heat from your hand moves into the cold substance.
• coldness moves from the cold substance into your hand.
• it melts.
• it freezes.

This is a measure of the average kinetic energy of the particles in an object.

• temperature
• thermal expansion
• electricity
• sound

4. If the atoms of an object are moving slow, the object would feel...

• cold or cool.
• hot or warm.
• unknown.
• smooth.

When you touch something that feels cold, 

• heat from your hand moves into the cold substance.
• coldness moves from the cold substance into your hand.
• it melts.
• it freezes.

The temperature of a substance increases as___.

• the substance expands
• the average kinetic energy of its particles increases
• the substance's volume increases
• the substance's mass increases

You're holding hands with your best friend.  Your friend's hands are REALLY warm and yours are really cold.  After a few minutes, this has changed.  How might you explain what happened?

• The cold energy from your hand transferred to your friend's hand through conduction.
• The heat energy from your friend's hand transferred to your hand through conduction. 
• The cold energy from your hand transferred to your friend's hand through convection.
• The heat energy from your friend's hand transferred to your hand through convection.

Observe the diagram. Which statement is true about the kinetic energy of the molecules in the containers?

• The molecules are moving faster in Diagram A

• The molecules are moving slower in Diagram A

• The molecules are moving at the same rate in both diagrams

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed 
• Energy cannot be created or destroyed, it can only transformed
• Energy can't be created, destroyed or transformed

Which of the following pictures represents particles in a solid?

• 
• 
• 
• None of the options represent particle in a dolid.

The molecules of which of the following would have the most kinetic energy?

• an ice cube

• a glass of cold water

• boiling water

• a cup of warm tea