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11-14 | Energy Transfers

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10 minutes maximum! (can you do it in 5?)

 

 

 1. Energy is measured in...

  • A) joules
  • B) watts
  • C) pascals
  • D) newtons
 

2. This label on a bag of rice shows that 100 g of rice contains 1480 kJ of energy.

This is the same as

  • A. 148000 J
  • B. 1480000 J
  • C. 14800000 J
  • D. 148000000 J
rice food label

3. What is the name given to the energy stored in rice?

  • A. gravitational potential energy
  • B. kinetic energy
  • C. elastic energy
  • D. chemical energy

4. What energy store is increasing when you climb up stairs?

  • A. gravitational potential energy
  • B. kinetic energy
  • C. elastic energy
  • D. chemical energy

5. Thermal energy is transferred when we cook food. It always transfers from..

  • A. one hot object to another hot object
  • B. one hotter object to a colder object
  • C. one colder object to a hotter object
  • D. one cold object to another cold object

Q 6-9. These questions are about transfers (shifts) in energy stored.

For each example choose the correct inital and final energy store.

 
  Energy transfer Inital Stored Energy   Final Stored Energy
6+7 An arrow fired from a bow. to

8+9 A branch falling from a tall tree. to

10. A vehicle is slowed down and stopped by friction brakes on the wheels. The kinetic energy is converted to..

  • A. thermal energy.
  • B. chemical energy.
  • C. kinetic energy.
  • D. elastic energy.
racing car