Condition for Heat transfer to occur

1. Which of the following always moves from hotter to colder object?

•  A. Heat

•  B. Light

•  C. Sound

•  D. Temperature

2. What is needed for heat to transfer from one object to another? The two

 objects should __________

• A. have equal temperature.

• B. have different temperature.

   

• C. always be in contact for heat to travel through.

   

• D. always be inside a vacuum or empty space for heat to travel through.

3. A small cup of cold milk is being poured into a big mug half-filled with hot

 coffee. Which is true about heat transfer in this situation?

•  A. Cold milk transfers heat to the hot coffee.

   

• B. Hot coffee transfers heat to the cold milk.

   

• C. Both liquids absorb heat from each other.

   

• D. Heat will not transfer to either of the liquids.

4. What will eventually happen if you leave a bowl of hot soup for an hour on  top of the table in your room?

•  A. The soup will become colder than the room.

•  B. The room will become hotter than the hot soup.

•  C. Heat from the room will transfer to the hot soup.

•  D. Hot soup will eventually cool down to room temperature.

5. Which of the following statements is true about heat transfer?

• A. Heat transfers from a colder to hotter object.

• B. Heat transfers only in vacuum or empty space.

• C. Transfer of heat is only on objects that are in contact.

• D. Transfer of heat occurs when objects have different temperatures.

2. You place a warm bottle of juice in ice water. How would you compare the temperature of the juice to that of the water after one hour?

• A. the same

• B. much hotter

• C. much colder

• D. a little bit colder

The ice cubes melt as you hold them in your hand. What is the direction of heat transfer in this situation?

• A. ice cube ---> air

• B. hand--> ice cube

• C. hand --> air

• D. ice cube-->hand