Why is Sun Screen Important Safe in the Sun The sun produces lots of different types of rays some you can see and some you cant It is some of those you cant see that do the damage Sun Screen ID: 335283
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Slide1
Safe in the SunSlide2
Why is Sun Screen Important?Slide3
Safe in the Sun
The sun produces lots of different types of rays, some you can see and some you
can't
It
is some of those you can't see
that
do the damageSlide4
Sun Screen
A bottle of sun cream does not contain just one substance.
It
is a mixture of lots of ingredients, each doing an important job.
One
of the main ingredients has the job of stopping too much harmful ultraviolet from reaching the skin.
But, there's problem!Slide5
Lumps or Powder?Slide6
Roles & Responsibilities
Administrator
keeps a written and pictorial record for the group
Resource Manager
collects, sets up and returns all equipment used by the group
Communications Officer
collects the group’s ideas and reports back to the rest of the class
.Health and Safety Manager takes responsibility for the safety of the group, making sure everyone is working sensibly with the equipmentPersonnel Manager takes responsibility for resolving disputes within the group and ensuring the team works togetherSlide7
You will need
4 plastic cups of different types of sugar (this will represent the
suncream
active)
Cubes
Caster
Granulated
Icing4 plastic measuring cups with red lids4 plastic spoons1 timerWhich of the sugars is spread most evenly throughout the oil?Slide8
Planning
We
are investigating
We could change…
We could measure/observe…
We will change…
(independent)
We will measure/observe (dependent)
We will keep the same
Our question is….
Amount of oil
??
??
??
??
??
How quickly the sugar sinks
??
??
??
??
??
??
??
??
??
??
Which sugar is most dispersed?Slide9
Planning
We
are investigating
We could change…
We could measure/observe…
We will change…
(independent)
We will measure/observe (dependent)
We will keep the same
Our question is….
Amount of oil
Type of sugar
Type of oil
Amount of sugar
??
??
How quickly the sugar sinks
??
??
??
??
??
Type of sugar
How quickly the sugar sinks
Amount of oil
Type of oil
Amount of sugar
Which sugar is most dispersed?Slide10
Lumps or Powder?
Which product do you find was spread most easily in the oil?
When
this main ingredient arrives from the factory where it is made it comes as large lumps.
To
make the sun cream, however, this needs to be a powder, like this photograph
showsSlide11
Grinding SolidsSlide12
GRANTSlide13
Grinding Solids
As we know, the sun screen active ingredient arrives in lumps and needs to be ground into a powder
Can you find the best material to grind up sugar lumps into powder?
How can we make it a fair test?Slide14
You will need
Marbles
Ball bearings
Smarties
/ beans
3 pots with lids
3 sugar cubesWeighing scales (shared between the class)Slide15
What did you find was the best way to break the lumps into powder?Slide16
Testing SunscreensSlide17
Testing SunscreensSlide18
You will need
UV beads
Small samples of sunscreen A, B and C
Tray
3 Plastic cups
Teaspoon
PipetteSlide19
Product Protection
Can you think of other products that might have sun protection in them?Slide20
Thank you!
We hope you enjoyed our visit!
Perhaps one day you would like to be a scientist too?!