2. Imagine Idea #1
Our materials are rocks, cotton, cloth to trap and
insulate heat. We need 1 unit of each material.
Some advantages are: less toxic and more safe,uses
less material, less impact on the environment,good
insulators.
Disadvantages: we can only use one unit of each
material, and has more points because cloth and
cotton are processed, slow to cook.
Monday, May 20, 13
3. Imagine Idea #2
Our materials are rocks for insulation. We
need 2 units and newspaper to trap and
insulate heat close holes We need 1 unit.
Advantages: healthy, less materials, less
impact on the environment, insulates well.
Disadvantages: toxic,ink and slow to cook
Monday, May 20, 13
6. Materials How many units
We will use
materials by
Cotton
Cloth
Rocks
1 cup (unit)
Use it to trap &
insulate heat
1 sheet (unit)
Use to trap and
insulate heat
1 cup (unit)
Use to insulate
heat.
Monday, May 20, 13
8. Sun
Time Temperature
0 min. 25°c
5 min 47.5°c
10 min. 49.3°c
15 min. 53.1°c
20 min. 54.9°c
Monday, May 20, 13
9. Shade
1 min. 49.8°c
2 min. 49.8°c
3 min. 38.5°c
4 min. 38.5°c
5 min. 34.3°c
6 min. 34.3°c
Monday, May 20, 13
10. Create for design #1
Our heat score is our solar oven
maximum temperature
subtracted from the control
oven:55-55=0.
Our time score is the number of
minutes it took the solar oven to
cool down which was: 5 minutes.
Our impact score total was: 4.
Our total score for the solar
oven is: 1.
Monday, May 20, 13
11. Improve For Design #1
The total score for our first solar oven was 3 points.
The parts of our solar oven design that worked well were
cotton And rocks because they are good insulators.
The parts of the solar oven that did not work well was cloth
because it keep falling apart and light colors.
We are going to try to improve our heat score.
We will improve are heat score by removing cloth and adding
sand because it traps heat well.
Monday, May 20, 13
14. Plan For Design #2
Materials Units
We will use the
materials by
Rocks 1 cup
To trap &
insulate heat.
Sand 1 cup
To trap and
insulate heat.
Cotton 1 cup
To trap and
insulate heat.
Monday, May 20, 13
15. Impact Score for design #2
Materials Reduce
Natural or
processed
Reuse Recycle
Rocks
Sand
Cotton
1 unit
Natural
-1
Yes -1 Yes -1
1 unit
Natural
-1
Yes -1 Yes -1
1 unit
Process
+1
No +1 No +1
Total points
0 points
Monday, May 20, 13
16. Sun #2
Time Temperature
0 min. 24.4°c
5 min. 42.9°c
10 min. 65.5°c
15 min. 86.5°c
20 min. 45.9°c
25 min. 49.5°c
30 min. 42.2° c
Monday, May 20, 13
17. Shade #2
Time Temperature
1 min. 34.5°c
2 min. 36.7°c
3 min. 36.4°c
4 min. 36.2°c
5 min. 35.5°c
6 min. 34.6°c
7 min. 34.4 °c
8 min. 33.9°c
9 min. 32.7°C
10 min. 30.9°c
Monday, May 20, 13
18. Create for Design Number #2
Our heat score is our solar oven's maximum temp.
Subtracted from our solar oven's control oven: 87 -
53 = 34.
Our time score is the number of minutes it took
our solar oven to cool down witch was: 10 minutes.
Our impact score was 0 points.
The new total score for the solar oven is: 44
Monday, May 20, 13
19. Reflections
Our improved design worked well because everything
were very good insulators and in a great place! The
material(s) we changed was cloth, we switched it to sand.
Sand was a good insulator because it is spread out and
traps air well.
If we could improve again we would reposition the cotton
more but all of our materials would be the same because
our heat score, time score and impact on the environment
score are great!
Monday, May 20, 13
