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The _____ is the realm of human activity.

green house effect

The radiative balance between incoming and outgoing energy is moderated by the _____.

exentricity, tilt of earths axis, and wobble

Which variations in Earth's orbit have an effect on Climate?

100,000 years

Eccentricity has a period of approximately _____.

water vapor

Which is the most important of the naturally occurring greenhouse gases?

21 thousand years ago

The peak of the last Ice Age, when glaciers blanketed much of North America, was _____ years ago

Earth-Moon tidal gravity

Which of the following does NOT have a known effect on Earth's climate?
a) Earth-Moon tidal gravity
b) greenhouse effect
c) eccentricity of Earth's orbit
d) tilt of the Earth
e) precession (wobbling) of Earth's axis

shrinking with glaciers, reduction sea ice, increase temp in arctic, changes in animal migration

Evidences of recent climate change are found in _____.

carbon dioxide

The most probable cause of anthropogenic warming in the foreseeable future is the increase in _____.

tilt of earths axis

_____ is the astronomical motion considered by Milankovitch as most related to the seasons.


Climate is the average weather conditions of a location or region over time.


Global warming refers to present-day warming of the world's climate that most scientists believe is likely to continue and is, at least, partly caused by human activities.


The term albedo refers to the reflectivity of a surface as a percentage of the total reflected radiation.


Paleoclimatology is the scientific study of ancient climates.

F- know for sure

Claims that past Earth climates were different from today are just speculations.


Death Valley, California was almost entirely under water during the last ice age.


Scientists commonly use variations of the Köppen system to describe the present-day distribution of climate zones.


Earth emerged from the last ice age about 10,000 years ago.


Milankovitch cycles are the combined influences of astronomical-orbital factors that produce changes in Earth's climate.

F- one of many

Greenhouse gases entirely control global climate.


Fossils of tiny sea creatures called foraminifera, which once lived in surface waters, equilibrate with the water around them, preserving a chemical record of past climatic changes


The Medieval Warm Period was an episode of mild climate during the Middle Ages.


The Little Ice Age was characterized by unusually snowy winters, cool, wet summers, and expansion of sea ice in the North Atlantic.

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