6172RB Science a STEM approach Year 2 low res watermark

Chemical sciences
LIVING IN A MATERIAL WORLD
Lesson 6
Teacher notes
Science inquiry focus:
How does paper recycling involve mixing materials?
Science Inquiry Skills:
• Questioning and predicting QP
• Planning and conducting PC
• Processing and analysing data and information PA
• Communicating C
Science as a Human Endeavour:
• Students observe mixtures of materials, ask questions
about and describe properties of the combinations.
• Students understand that science is used in daily
life, including when mixing materials to make new
materials, like recycling paper into another product.
Technology/Engineering/Mathematics links:
• investigating paper recycling by watching an online
video as a class
• using a digital camera or iPad® to take a photograph
and observe the mixture
• playing with materials to create design ideas like a
bowl
• exploring the properties of materials that are needed
for a bowl
• measuring ingredients
Background information
• Mixing materials together creates a mixture.
The substances are physically combined and
can be separated again by methods such as
sieving, filtering or evaporating. The change can
be reversed and a new material is not formed.
For example, when paper is mixed with water
it can be returned back to paper by drying out
the water with heat, as happens in the recycling
process.
• If the papier-mâché bowls did not have glue
and salt added, they would dry to be similar
in feel to the original egg carton cardboard.
For the purpose of creating a bowl, the paper
needs to dry harder. The addition of glue to the
mixture adds this property.
Assessment focus:
• Use page 63 as a formative
assessment of the student’s ability
to think scientifically through
creating a hypothesis, conducting an
experiment, following a procedure,
observing results and making a
conclusion.
• Observe students’ responses
during the reflection to gauge their
understanding that recycling involves
mixing materials together for a
purpose, and that materials can be
added to enhance a desired property,
like glue to make something hard.
Resources
• Recycled paper and bins from the
classroom
• How it’s made—paper recycling video
at
• Bowl making activity:
— cardboard egg cartons
— warm water
— 2 tsp salt
— 3 tbsp glue
— cling wrap
— various bowls or containers to use
— digital camera
Note: To save time the teacher may
wish to soak the ripped pieces of
egg carton in warm water prior to the
lesson. Two hours should be sufficient.
© R.I.C. Publications
Low resolution display copy
R.I.C. Publications® – www.ricpublications.com.au 978-1-925431-95-7 YEAR Science:
2 A STEM APPROACH 61