2. Imagine for design #1
• Idea number one
• Our materials are shredded felt, flat foam.
• We need one unit of shredded felt, and two units of flat
felt.
• The advantage of this idea is both materials are good
insulators and will cover the inside of the solar oven.
• The disadvantages of this idea is the foam has a bigger
impact to the environment.
Monday, May 20, 13
3. Imagine for design #1
• Idea two
• Our materials are shredded felt, flat foam.
• We need two units of shredded felt, and one unit of flat
foam.
• The advantages of this idea is shredded materials are
better insulators, so there is more shredded than flat.
• The disadvantages of this idea is we might not have
enough foam for the sides of the oven.
Monday, May 20, 13
6. Plan for design number
one
Material Units
We will use the
material by.
Shredded felt
Flat foam
1 unit
To cover the
bottom of the
solar oven.
2 units
To cover the
sides of the
solar oven.
Monday, May 20, 13
7. Impact score for design number
one.
Design
#1
Reduce
Natural or
processed Reuse Recycle
Total
points
Shredded
felt
Flat
foam
Units 1 Processed No No 7
Units 2 Processed No No 4
Our first impact score was eleven.
Monday, May 20, 13
8. Solar oven testing in
the sun
Time Temperature
0 minutes 25°C
5 minutes 47°C
10 minutes 55.8°C
15 minutes 60°C
20 minutes 61.6°C
25 minutes 58°C
Monday, May 20, 13
9. Solar oven in the shade
Time Temperature
1 minute 40°C
2 minutes 38°C
3 minutes 37.4°C
4 minutes 32.5°C
5 minutes 31.1°C
6 minutes 30.9°C
Monday, May 20, 13
10. Create for design
Number one
• Our heat score is our solar ovens maximum
temperature subtracted from the control oven:
62°C-55°C=7°C.
• Our time score is the number of minutes it took
to cool down which was 4 minutes.
• Our impact score was eleven points so that
tells me I need to improve our score because
our first two materials was processed.
Monday, May 20, 13
11. Improve for design
number one
• Our score for the first solar oven as 0 points.
• The parts of our solar oven design that worked well
were the shredded felt because the shredded
materials are better insulators.
• We are going to improve the impact score because
our impact score is high and we want to bring it
down so we are going to improve it choosing the
items that are natural and not the items that are
processed.
Monday, May 20, 13
14. Plan for design number
two
Material Units
How will you
use the
material.
Sand
Rocks
News paper
1 unit
Spreading
across the
bottom
1 unit
Placing over
the sand
1 unit
Cutting it for
the sides
Monday, May 20, 13
15. Impact score for design two
Design
#2
Reduce
Natural or
processed
Recycle Reuse
Total
points
Rocks
Sand
News
paper
1 unit Natural Yes Yes -2
1 unit Natural Yes Yes 0
1 unit Processed Yes Yes -2
Our total points were a -4
Monday, May 20, 13
16. Solar oven testing in the
sun
Time Temperature
0 minutes
5 minutes
10 minutes
15 minutes
20 minutes
25 minutes
24.4°C
49.5°C
51.5°C
43.9°C
54°C
48.4°C
Monday, May 20, 13
17. Solar oven testing in the
shade
Time Temperature
1 minute
2 minutes
3 minutes
4 minutes
5 minutes
6 minutes
32°C
31.7°C
31.1°C
30.9°C
31.9°C
30.5°C
Monday, May 20, 13
18. Create for design
number two
• Our heat score is our solar ovens maximum
temperature subtracted from the control oven:
54 - 53 = 1.
• Our time score is the number of minutes it took
to cool down which was 7 minutes.
• Our total impact score was -4 points.
• Our new total score for the solar oven is 12.
Monday, May 20, 13
19. Reflection
• Our improved design worked well because the first materials we
had made us get a really low score which was zero and this
time our score was 12 which was an improvement. The
materials we changed were foam, and felt because they had an
bigger impact on the environment. The sand, rocks and
newspaper were good insulators because they made our
temperature increase and had a low impact on the environment.
• If we could improve again we would have three materials
because that would make our score a lot higher and make our
impact score lower. My group is a lot happier because we
would have a higher score than everybody who used
newspaper.
Monday, May 20, 13
