Y1/2B Summer 1 Science Everyday Materials – Exploring Changes

Session 5: Wonderful Wax!
Science curriculum area: Everyday Materials / Everyday Materials
i. identify and name a variety of everyday materials, including wood, plastic, glass, metal, water, and rock (1EM)
ii. describe the simple physical properties of a variety of everyday materials (1EM)
iii. compare and group together a variety of everyday materials on the basis of their simple physical properties (1EM)
iv. identify and compare the suitability of a variety of everyday materials, including wood, metal, plastic, glass, brick, rock, paper and cardboard for particular uses (2EM)
Working Scientifically / i. asking simple questions and recognising that they can be answered in different ways
ii. observing closely, using simple equipment
iii. using their observations and ideas to suggest answers to questions
iv. gathering and recording data to help in answering questions
Teaching Objectives / ·  Have a go at wax drawing and washing as a way of giving fabric waterproof properties.
·  Make a wax resist picture using wax crayons, oil pastels and paint.
·  Consider why waterproof material is sometimes used for making clothes and think of other reasons why a material may need to be made waterproof.
Key Vocabulary: material, properties, absorbency, waterproof, strong, resist
Resources
Examples of wax resist art, watercolour paint or thinned poster paint, paint brushes, pieces of card, wax crayons, oil pastels, or a stick of fabric wax, squares of fabric, Vaseline, and tin foil. / Weblinks
http://www.craftsy.com/blog/2015/05/wax-resist-painting/ - Useful website showing step-by-step instructions about wax resist painting;
https://www.theartofed.com/2013/05/24/using-chalk-to-create-vibrant-wax-resist-paintings/ - Using chalk and oil pastel in wax resist painting.
Before the session: Mix up poster paint to a thin consistency ready for painting. Make available wax crayons, oil pastels and paper or fabric.
Whole class: Ask the chn if they have any waterproof clothes and what they wear it for. Show them a waterproof coat and drip water on it to demonstrate that it resists the water. Ask what they think it is about the material that is resisting the water. Explain that it is a coating on the material. Tell chn that they are going to make a waterproof coating on card and fabric and turn it into art. Explain that wax resists water so it a perfect coating for waterproofing something. Show them the examples of wax resist art in the resource as a source of inspiration for the art they will do during this session. Say: We now know that wax is waterproof and so it doesn't absorb water. When the paint touches the wax, it rolls off and gets absorbed by the surrounding paper. So the lines of your painting will be waxy with no paint, because the paint can't be absorbed there. When the chn have experimented on card, give them larger sheets of card or fabric upon which to do their design. There are many variations of wax resist painting, some more complex than others.
Year 1
Let the chn practise on a scrap of card or paper to explore the resisting and absorbing qualities of the wax crayon and paint. Explain that they will need to draw lines with the wax crayon and then paint over and around those lines, watching the paint being absorbed into the paper but not where the crayon lines are. / Year 2 An adult needs to work with these children
Ask these chn to explore resist printing by spreading a layer of Vaseline onto a sheet of tin foil (as if to make an ink pad), carefully pressing a small object (leaf, for example) into the Vaseline and then printing it onto the paper. The Vaseline on the paper should act like wax when paint is applied. This is more advanced than the printing with paint because it requires care when applying both the Vaseline to the object, and then the paint around the Vaseline.
Plenary / When the chn have explored the wax resist painting, ask them to place their art on a central table or area of floor. Then go on a Painting Parade, looking at all their work and congratulating them on their technique. Place them together to produce a collaborative piece of art and display it in the classroom.
Outcomes / Children will:
·  Understand how to make a wax resist picture using wax crayons, oil pastels and paint
·  Understand why wax resist painting works and the role the wax plays in waterproofing
·  Consider the questions: why is waterproof material sometimes used for making clothes? Can you think of other reasons why a material needs to be made waterproof?

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