Energy changes

Energy changes

Pencil and paper
Overview
Connecting to the Curriculum
Marking Student Responses
a)  In each of these eight objects, energy changes from one form to another.
 
 
Lamp Iron Candle Blender
       
       
 
 
Fan Car Gas stove Person walking
   
  Write the names of the eight illustrations in one box in the chart below to show the main energy change each object makes. The first one is done for you.

  Energy changed to
Energy changed from Heat energy Kinetic energy Light energy

Electrical energy
 
 

     Lamp

Chemical potential energy
 
 

      
 
b)		  
What is the main energy change when a sewing machine is used?
 
_______________________________ changes to _______________________________
 
c) What is the main energy change when a torch is turned on?
 
_______________________________ changes to _______________________________
Level:
5
Curriculum info: 
Science, Knowledge, Physical World
Keywords: 
physics concepts, energy, energy transformation
Description of task: 
Task: Complete a table to show how energy is transformed in eight objects and describe the energy transformations in two others. Assessment focus: energy transformation.
Answers/responses: 
  Y11 (03/00)
a)

Energy changed to
Heat energy Kinetic energy Light energy
Iron Blender
Fan		 Lamp
Gas stove Car
Person walking		 Candle*

iron – very easy
blender – easy
fan – easy
stove – easy
car – moderate
person – easy
candle – moderate
b) electrical energy to kinetic energy easy
c) chemical potential energy to light energy difficult

*NOTE: the difficulty estimates for "candle" are likely to be low due to the order this question was trialled in.