Exploring Heat Energy

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Questions and Answers

How does a microwave pop popcorn?

  • By using waves to cool down the popcorn kernels
  • By using conduction to transfer heat from the microwave to the popcorn kernels
  • By using convection to transfer heat from the microwave to the popcorn kernels
  • By using radiation to excite the popcorn kernels and heat them up (correct)

What is conduction?

  • The transfer of heat through radiation
  • The transfer of heat through solid objects (correct)
  • The transfer of heat through gases or liquids
  • The transfer of heat through waves

How does an air popper heat popcorn?

  • By using convection to transfer heat from the air popper to the popcorn kernels (correct)
  • By using waves to cool down the popcorn kernels
  • By using radiation to excite the popcorn kernels and heat them up
  • By using conduction to transfer heat from the air popper to the popcorn kernels

What happens when butter is placed on a warm biscuit?

<p>The biscuit molecules excite the molecules in the butter, causing it to melt (C)</p> Signup and view all the answers

Which way of transferring heat energy involves the use of hot air or gases?

<p>Convection (C)</p> Signup and view all the answers

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