English National Curriculum - Science Science

3. Observe chemical reactions and describe how we know new materials are made

Mission Objectives

Name some irreversible changes

Use observations to describe how you can tell an irreversible change has taken place

Explain why the change is irreversible and what new products have been made

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Keywords

Words and meanings to learn

irreversible

a change to a substance that cannot be undone or reversed

compare

discuss how 2 or more things are the same and how they are different

chemical change

a type of change in which a new substance is formed

effervescence

fizzing or bubbling

product

new substances made after the chemical change has happened

This lesson has been written by

Clare Faulkner

Clare is an experienced primary school teacher, having worked across both Key Stage 1 and Early Years. Before joining Developing Experts, Clare worked as a Quality Assurance Inspector for a childcare agency, following OFSTED's inspection criteria. Clare is passionate about education and ensuring children's learning is exciting and fun!

In her spare time, Clare is also a mother of two very active children and lots of animals! She enjoys a variety of sports and loves the outdoors!

Sarah Mintey MBE

Sarah is a former headteacher and charity CEO who founded Developing Experts in October 2015 with the goal to create a fit-for-purpose curriculum for schools. The company has created a science curriculum for children ages 4-16 which is delivered through sequenced lessons mapped against the National Curriculum in biology, chemistry, and physics. Developing Expert's innovative approach to learning has already been road-tested and voted 'best EdTech product in Europe', winning Tech Nation’s Rising Stars earlier in 2019 and a place on Google for Startups Immersion program 2020. In 2022 Developing Experts won the BETT Awards for Best Classroom Resource - Teaching Aid. Sarah is a 'LDC Top 50 Most Ambitious Business Leader' 2022. In October 2022 Developing Experts joined Tech Nation's Upscale 8.0 programme.

Sarah is delighted to be working with over 6500 UK schools and clients such as the Royal Horticulture Society, Network Rail, Rolls Royce, BEIS, National Nuclear Labs, Anglian Water and the Ministry of Defence.

Sarah was awarded an MBE for her services to tech and education in 2020. 

Katie Barrie


Katie is the Chief Operating Officer at DE, which means she oversees HR, finance and our business model. After studying Drama at Exeter University, Katie spent three years as a primary teacher, before relocating to Norfolk and joining Developing Experts. 

In her spare time, Katie likes to sing with Norwich Harmony barbershop chorus and has recently formed a quartet. Katie loves cooking and spending time with her husband, Bryan and dog, Bertie. She has an endearing laugh, which has to be heard to be believed. Many of us see Katie as the office 'Mum', she gives great hugs and keeps our spirits up.  

Contact: [email protected]  

Required Resources

Resources: Class presentation, water, a fizzing tablet such as Berroca or Alka-Seltzer, vinegar, bicarbonate of soda, a candle, matches, soapy water, water, milk, small bottles for liquids and small containers (small aluminium pie cases work well).

Core Handout (2): A table for children to record their observations.

Stretch Handout (3): A table for children to record their observations and explain why it is an irreversible reaction.

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