1. Heat Loss
and
Surface Area

2. The greater the surface area, the faster the heat loss
The less the surface area, the slower the heat loss

3. Examples of How Surface Area Affects Temperature

4. Controlling the surface area, helps control the temperature (Thermoregulation)
Elephant ears act like heat radiators to help control body temperature

5. African Elephant: Hot Climate Big Ears with Many Veins
Asian Elephant: Cool Climate Small Ears with Few Veins
Small
Ear
Big
Ear

6. Sleeping Position and Heat Loss
(COLD NIGHT)
(HOT NIGHT)
Spread out position
Fetal position
Greater Surface Area
Less Surface Area
Increased Heat Loss
Decreased Heat Loss

7. During warm months, they are able to spread out
In extreme cold, penguins huddle together to reduce the surface area of the flock
During warm months, they are able to spread out