Climate Change
Today, it takes about ______ Calories of energy to produce about 1 Calorie of food.
55
What is heat energy?
the kinetic energy of moving atoms and molecules
Which of the following is a challenge to using solar generated electricity in places not connected to a power grid?
the lack of efficient and inexpensive battery technology
On average, how far do agricultural products travel from farm to plate in the United States?
1400 miles
It has been estimated that confined animal feeding operations contribute to about _____ of world carbon dioxide emissions.
15%
Which of the following was necessary to generate useable electrical current for a home?
DC power had to be converted to AC.
Which of the following best describes the energy conversion sequence in the solar panel system described in the video?
Photons carrying energy from the sun chemically react with silicon crystals to generate a flow of electrons.