2. Imagine for Design #1
• Idea #1
• Our materials are newspaper, sand and rocks.
• We need 1 unit of sand and rocks and 2 units of
newspaper.
• The advantage of this idea is that both has the least
environmental impact and is a great insulator.
• The disadvantage of this idea is that the newspaper
isn't the best insulator of heat.
Monday, May 20, 13
3. Imagine for design #1
• Idea #2
• Our materials are cotton balls and cloth.
• We need 1 unit of cloth and 2 units of cotton balls.
• The advantage of this is idea is that both cotton and
cloth make good insulators of heat.
• The disadvantage of this idea is that cloth is in the
middle of the most and the least of environmental
impact.
Monday, May 20, 13
6. Plan for design #1
Material Units
We will use the
material by
Newspaper 2 Fold it
Rocks and Sand 1 Leave it how it is
Monday, May 20, 13
7. Impact Score for design #1
Design
#1
Reduced
Natural
or
processe
d
Reuse Recycle
Total
points
Newspap
er
2 units
Processe
d
Yes 3 3
Rocks
and sand
1 unit Natural No 0 0
Our total impact score
is 3 points.
Monday, May 20, 13
8. Time Temperature (Celsius)
0 min
5 min
10 min
15 min
20 min
25.0
43.5
46.3
54.1
57.4
25 min 60.4
Solar oven testing in the sun
Design #1
Monday, May 20, 13
9. Solar oven testing in the shade
Design #1
Time Temperature (Celsius)
1 min 50.0
2 min 42.7
3 min 38.1
4 min 36.2
5 min 35.5
6 min 34.4
Monday, May 20, 13
10. Create for design #1
• Our heat score is our solar oven maximum
temperature subtracted from the control oven.
60-55=5
• Our time score is the number of minutes it took
to cool down which was 5 minutes.
• Our total impact score was 3 points.
• Our total score for the solar oven is 7.
Monday, May 20, 13
11. Improve for design #1
• The total score for our first solar oven was 7.
• The parts of our solar oven design that worked well were the
rocks and sand because they gave off the most heat.
• The part of our solar oven design that did not work well was the
newspaper because the newspaper only put shade in the box.
• We are going to try to improve our heat score.
• We will improve our heat score by putting the oven I'm more
direct sunlight or put black cloth inside the oven instead of
newspaper to attract/absorb more sunlight.
Monday, May 20, 13
14. Plan for design #2
Material Units
How will you use
the material?
Cloth
Sand and rocks
2 Cut it into strips
1 Leave it how it is
Monday, May 20, 13
15. Our impact score is 5
points
Design
#2
Reduced
Natural or
processe
d
Reuse Recycle
Total
points
Cloth 2 units
Processe
d
Yes No 3
Sand and
rocks
1 unit Natural No Yes 0
Design #2
Monday, May 20, 13
16. Solar oven testing in the sun
Design #2
Time Temperature (Celsius)
0 min 24.4
5 min 42.5
10 min 49.7
15 min 42.1
20 min 44.8
25 min 45.3
30 min 45.5
Monday, May 20, 13
17. Solar oven testing in the shade
Design #2
Time Temperature (Celsius)
1 min 37.8
2 min 35.4
3 min 33.7
4 min 32.8
5 min 31.6
6 min 30.9
7 min 29.7
8 min 28.9
9 min 28.6
10 min 28.3
Monday, May 20, 13
18. Create for design #2
• Our heat score is our solar oven maximum
temperature subtracted from the control oven:
50-53= negative 3.
• Our time score is the number of minutes it took to
cool down which was 3 minutes.
• Our total impact score was 3 points.
• Our new total score for the solar oven is negative 3
points.
Monday, May 20, 13
19. Reflection
• Our improved design did not work well because the
materials we changed were poor at insulating heat. The
materials were bad insulators because we got a total
score of negative 3. We took out the newspaper and
replaced it with cloth. Because our temperature
decreased, we knew cloth was a bad insulator.
• If we could improve again, we would change the
materials. Like instead of sand and rocks, we would
use foam because it could insulate the heat better so
the heat will increase. We know that foam is a good
insulator because it is thick.
Monday, May 20, 13
