Problem:
Question 1: Human agriculture is one of the biggest users of fresh water on our planet today. If you wanted to minimize the use of water on a farm field, how could you make a crude calculation of the amount of water to use (the irrigation rate)?
a.) Calculate the PET for the day and irrigate with exactly that much water.
b.) Calculate the PET for the day, subtract recent rainfall, and irrigate with the difference between those.
c.) Measure the temperature, multiply by 2, and irrigate with exactly that much water (in mm).
d.) Figure out the specific PET for your crop and irrigate with exactly that much water.
Show your calculations, but you do not need to write out any explanation.
Question 2: Approximately how many watts does a 50,000 gram human at rest (about 110 lbs) generate from metabolic heat?
?watts Please show your work.
Question 3: If kangaroo rats were moved from the desert to northern tundra, where temperatures are much colder, and then allowed to evolve for many generations, which of the following adaptations might you expect for heat retention?
a.) A larger body size.
b.) A smaller body size and lower movement rate.
c.) A lighter skin color that reflects more sunlight.
d.) The development of sweat glands.
Give reasoning with your answer.
Question 4: Using concepts described in this section, describe whether wrapping yourself in a light colored blanket during a sunny, very hot day in the desert would make you feel warmer or cooler. Justify your answer by referring to the heat balance equation. Explain.
Question 5: Where would you expect a freshwater fish to get most of its water from?
a.)Secretion
b.) Absorption
c.) Metabolism of food
d.) Evaporation
Give reasoning with your answer.