Which of the following is an example of
When Joan gets a low grade on a test, she studies
harder for the next test.
When income rises, people spend more.
But when they spend more, income rises.
As the oxygen in the blood declines,
an animal breathes faster. As it breathes faster, the
oxygen in the blood rises.
When temperature in a house rises, the
air conditioner turns on and cools the house.
The subject of climate change involves
many feedback loops. In fact, without positive feedback,
there would be no real concern about the increasing
levels of carbon dioxide in the atmosphere. Three of the
following are examples of positive or amplifying feedback
and one is an example of negative or dampening feedback.
Which is the example of negative feedback?
More carbon dioxide in the atmosphere
raises ocean temperatures; oceans can hold more carbon
dioxide when they are cooler.
Warmer climate reduces snow cover;
snow cover reflects sunlight, which prevents
More carbon dioxide increases plant
growth; plants absorb carbon dioxide from the
Warmer temperatures lead to more water
vapor in the atmosphere; water vapor is a greenhouse