2. Imagine for design #1
Our materials are Cotton Balls, Foam, and Sand.
The advantages is that the sunlight will go to the sand on
the bottom which will make it hot and then the cotton balls
will get ht, and the foam will keep the heat inside.
The disadvantages are that the materials over heat in the
solar oven then the item inside the solar oven could burn .
Monday, May 20, 13
3. Imagine design #2
Our materials are Sand and foil
Are advantages is that the sand and foil will heat up the
box
Our disadvantages is that the foil will burn
Monday, May 20, 13
6. Plan design
Materials Units
Sand 1
We will use the materials
On the bottom
of the box
Cotton balls 1
Foam 1
The cotton balls can
go on top of the Sand
The foam can go on
the onto some of the
sides
Monday, May 20, 13
7. Impact score for design #1
Design
#1
Reduce
Natural or
processed
Reuse Recycle
Total
points
Cotton
balls
Sand
Foam
1 unit Processed No No 4
1 unit Natural Yes Yes -2
1 unit Processed No Yes 2
The total points 4
Monday, May 20, 13
8. Solar oven temperature
Time (minutes) Solar oven temperature
1
2
3
4
5
6
44.8
41.2
36.9
34.4
33.0
31.7
Monday, May 20, 13
9. Solar oven testing in the sun
Time Temperature
0 minutes
5 minutes
10 minutes
15 minutes
20 minutes
25 minutes
25.0°c
46.9°c
47.0°c
55.3°c
46.8°c
55.6°c
Monday, May 20, 13
10. Create
56.0°c-55.0°= 1.0° so our heat score
4 minutes is the time score
The total impact score is 4 minutes
1 + 4 min -4= 1 so 1 is the total score
Monday, May 20, 13
12. Plan for Design #2
Design
#2
Reduce
Natural
or
processe
Reuse
Recycle
or return
to nature
Sand
Aluminum
foil
1 unit Natural Yes Yes
2 units Processed No No
Total points 5
Monday, May 20, 13
13. Plan design #2
Material Units
How will yo u use the
material
Sand
Aluminum foil
1 unit Flat it
2 units Cut it
Monday, May 20, 13
14. Impact score for design #2
Design
#2
Reduce
Natural or
processed
Reduce Recycle
Total
points
Sand
Aluminum
foil
I point Natural Yes Yes -2
2 points Processed No No 7
5
Total points 5
Monday, May 20, 13
15. Solar oven testing in sun
Time Temperature
0
5
10
15
20
25
16.0
27.2
29.1
30.2
31.0
31.8
Monday, May 20, 13
16. Solar oven temperature
Time (minutes) Solar oven temperature
1 30.9
2 29.8
3 28.4
4 27.3
5 26.2
6 25.2
7 24.3
8 23.5
9 22.9
10 22.3
Monday, May 20, 13
17. Create for design #2
Our heat score is a solar oven maximum
temperature subtract from the control oven
-11+5-5=5 is the total.
Our score is the number of minutes it took to cool
down which was 5 minutes.
Our total impact score was 5.
New score for the solar oven is -11.
Monday, May 20, 13
18. Reflection
Our improved design did not work because it
doesn't have a lot of heat and and the
temperatures were lower the temperatures were
lower because it didn't Have a lot of insulators.
If we could improve again we would put a lot of
more things like more cotton, foam and sand and
the temperatures are going to be more higher
because its going to keep more heat in.
Monday, May 20, 13
