A sense of proportion

By Paul Yates2015-05-11T00:00:00

Paul Yates discusses a problem of relationships

Two variables are said to be proportional if the change in one can be predicted from a change in the other. There are two distinct types of proportional relationship relevant to secondary school chemists: direct and inverse proportion. Direct proportion is conceptually easier – for example, if we double the volume of a solid, we also double its mass.

Thanks for using Education in Chemistry. You can view one Education in Chemistry article per month as a visitor.

A photograph of a teacher standing in a white lab coat, speaking with a class of children in a laboratory, is superimposed on a colourful background. Text reads "Teach Chemistry means support for classroom and staff room".

Register for Teach Chemistry for free, unlimited access

Registration is open to all teachers and technicians at secondary schools, colleges and teacher training institutions in the UK and Ireland.

Get all this, plus much more:

unlimited access to resources, core practical videos and Education in Chemistry articles
teacher well-being toolkit, personal development resources and online assessments
applications for funding to support your lessons

Set up your Teach Chemistry account

Already a Teach Chemistry member? Sign in now.

Not eligible for Teach Chemistry? Sign up for a personal account instead, or you can also access all our resources with Royal Society of Chemistry membership.