Force- measured in newtons. 

-whatever can cause an object with mass to accelerate

-has magnitude and direction (vector quantity)

Energy-Joules

-the ability to do work

Power-Watts

-rate at which work is performed or energy transmitted

-P=w/t

*Why is CO2 a greenhouse gas and nitrogen not?

----Co2 is a green house gas because it blocks sunlight, radiation and heat

-it all depends on the composition of each element.

-needs to be monoatomic

-noble gases are not greenhouse gases

-nitrogen=diatomic molecule

**Project=Question Number 3: Global Solar Energy

-learned that 31 percent of incident sunlight is reflected and only 69 percent is used either on earth or functions within the atmosphere.

-drew the char illustrating that 45% is directly converted to thermal energy, 23% evaporated, 1% of the energy of winds and currents, and 0.08% used in photosynthesis