2. Imagine for Design 1
• Idea #1
• Our materials are dark cloth and cotton balls.
• We need 1 unit of dark cloth and 2 units of cotton balls.
• The advantage of this idea is that these materials will have a
small or medium impact on the environment and the colors of
the materials will affect how much heat it absorbs.
• The disadvantage of this idea is that the dark cloth is
processed and has ink so it is not completely environmentally
friendly.
Monday, May 20, 13
3. Imagine for Design 2
• Idea #2
• Our materials are light colored cloth and colored shredded
foam.
• We need 1 unit of light colored cloth and 2 units of shredded
foam.
• The advantages of this idea is that shredded foam will be a
good insulator and it will keep the heat inside.
• The disadvantages of this idea is that the foam and the cloth
have been processed so it affects the impact score.
Monday, May 20, 13
6. Plan for design #1
Material Units
We will use
material by
Cotton balls
Dark cloth
2 units
Glue the pieces
on the side of
the oven.
1 unit
Place it on
bottom.
Monday, May 20, 13
7. Impact score for design #1
Design
#1
Reduced
Natural
Or
process
Reuse Recycle
Dark
Cloth
Cotton
Balls
1 unit Process Yes No
2 units Process No No
Points
2 points
7 points
Our total impact score is 9 points
Monday, May 20, 13
8. Solar oven testing in the sun
Time Temperature
0 min.
5 min.
10 min.
15 min.
20 min.
25 min.
25 C
52.4 C
52 C
54 C
55.7 C
54.6 C
Monday, May 20, 13
9. Solar oven testing in the
shade
Time Temperature
1 min.
2 min.
3 min.
4 min.
5 min.
6 min.
7 min.
47.7 C
41.9 C
36.7 C
34.8 C
32.7 C
31 C
Monday, May 20, 13
10. Create for design #1
• Our heat score is our solar oven maximum
temperature subtracted from the control oven.
56 C - 55 C = 1
• Our time score is the number of minutes it took
to cool down which was 4 minutes.
• Our total impact score is 9.
• Our total score for the solar oven is -4.
Monday, May 20, 13
11. Improve for design #1
• The total score for our first solar oven was -4 points.
• The parts of our solar oven design that worked well was the
dark cloth on the bottom because it absorbed the heat.
• The parts of our solar oven design that did not work well was
the cotton balls on the side because they were light and they
didn't absorb much heat.
• We are going to try improve our heat score.
• We will improve our heat score by getting dark foam and
shredding and putting felt on the bottom because felt and foam
are good insulators.
Monday, May 20, 13
14. Plan for Design #2
Material Units
How will you
use the
material?
Felt 1 unit
We will leave it
flat. Covers the
inside of box.
Colored foam 1 unit
We will leave it
flat, covers the
inside of box.
Black foam 1 unit
We will leave it
flat. It covers
the edge of box.
Monday, May 20, 13
15. Impact score for
Design #2
Design
#2
Reduce
Natural/
process
Reuse Recycle
Felt
Colored
foam
Black
foam
1 unit Process No No
1 unit Process No Yes
1 unit Process No No
Total
points
4 points
2 points
4 points
Our total impact score is 10
Monday, May 20, 13
16. Solar oven testing in the sun.
Time Temperature
0 min.
5 min.
10 min.
15 min.
20 min.
25 min.
30 min.
16 C
25.9 C
27.9 C
28.5 C
30.3 C
39.1 C
40.4 C
Monday, May 20, 13
17. Solar oven testing in the
shade
Time (minutes) Temperature
1 min.
2 min.
3 min.
4 min.
5 min.
6 min.
7 min.
8 min.
9 min.
10 min.
31.9 C
26 C
23 C
21 C
19.7 C
18.8 C
18.7 C
17.7 C
17.3 C
17.1 C
Monday, May 20, 13
18. Create for Design #2
• Our heat score is our solar oven maximum
temperature subtracted from the control oven:
40 C - 41 C = -1 C
• Our time score is the number of minutes it to
cool down which was 4 minutes.
• Our total impact score was 10 points.
• Our total score for the solar oven is -7 points.
Monday, May 20, 13
19. Reflection
• Our improved design did not work well because the impact
score was higher and our heat score went down. Foam and
felt are good insulators but we placed them in the wrong place
and also they were flat. The materials we changed were the
dark cloth to felt and the cotton balls to the foam. The
materials were good insulators because they are thick and
they keep the heat in.
• If we could improve again, we would cover the whole inside of
the box with felt and we would shred the foam and tape it
inside. We would do this because we need to cover the inside
of the oven with a good insulator and shredded is better than
flat because it fills more space.
Monday, May 20, 13
