Electric kettles

Electric kettles

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about fair testing.

Question 1Change answer

electric kettle
Two electric jugs of water were boiled. They took different times to boil.
Carefully explain four factors which could have affected the time taken for the water to boil.
1.
2.
3.
4.
 
Task administration: 
This task can be completed with pencil and paper or online.
Level:
5
Curriculum info: 
Science, Investigating in science, Physical World
Keywords: 
physical inquiry, boiling, fair testing
Description of task: 
Using the principles of fair testing, students identify four factors that could affect the time it takes for electric jugs to boil water.
Curriculum Links: 
Science capabilities
The capabilities focus is brought about by the conversations you have and the questions you ask.
 
Capability: Gather and interpret data
This resource provides opportunities to discuss the importance of controlling variables when using fair testing for an investigation.
 
 
Science capabilities: 
Gather and interpret data
Answers/responses: 
  Y11 (04/2001)

Any 4 of:

  • Different amount of water used in each jug.
  • The jugs had different power/wattage ratings/different size element.
  • The initial temperature of the water was different.
  • The jugs had different efficiencies.
  • The jugs were different brands/made from different materials/different ages.

4 correct – very difficult

3 correct – moderate

2 correct – easy

1 correct – very easy