1. Stevenson Screen

2. What is a Stevenson screen?
 A white wooden
box with louvres
to shelter
thermometers
from direct heat
of the Sun and
allow air
circulation.

3. What is placed inside the
Stevenson screen?

4. Where should Stevenson
screen be placed?

6. Where should Stevenson
screen be placed?
 It should be place 1m above
the ground level
 to prevent heat conduction from
the ground.
 Thermometers will not be
affected by heat radiating from
the ground

8.  Located away
from building
or trees
 Building and
trees provide
shade,
causing the
reading to be
inaccurate

9. Where should Stevenson
screen be placed?
 On grass and not concrete
ground
 toreduce heat conduction from
the concrete ground.

10. Why are there louvres and holes
on the Stevenson screen?
 Allow air
circulation
 Therefore hot air
will not be
trapped in it
 Causing reading
to be inaccurate

11. Why it is painted white?
 White colour reflect heat from
the Sun.
 Therefore reading will be
accurate.