It is warmer at the equator than at 80° N because .

the sun's energy is spread out over a larger area at the equator
the sun's energy is spread out over a smaller area at the equator
the equator receives more sunlight
the equator is closer to the sun

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down

Eutrophication caused by human nutrient pollution.