In this activity children look at the factors that affect dissolving to plan an investigation to find out the quickest method of removing the new gum.
Scientists have developed the first non-stick, biodegradable gum. In most situations, it doesn't stick to pavements, clothes, shoes or hair - and tests by gum lovers have confirmed it has the same texture, taste and chewiness as conventional chewing gum. The new gum dissolves naturally in water and is easily washed away by rain.
Children will look at the factors that affect dissolving, to plan an investigation to find out the quickest method of removing the new gum. They will look at a graph of rates of dissolving in hot and cold water to help them plan their investigation.
- that some solids can be dissolved
Children will learn
- that certain factors may affect how fast solids dissolve
- use a fair test to investigate ideas about helping solids dissolve more quickly and explain how it was fair
These resources were initially developed in partnership with the Centre for Science Education, Sheffield Hallam University.