5. If forests serve as important sinks for greenhouse gases, describe how past ice ages might have affected the concentration levels of carbon dioxide in the atmosphere.

Answers

Answer 1
Answer: Forests and other green plants uses carbon dioxide in photosynthesis thus lowering its amount in the atmosphere. In assumption, we can claim that in the ice ages, the low level temperatures may have caused the carbon dioxide levels to neutralize over these phenomenons, also to note that there were less oxygen-breathing organisms and higher carbon-dioxide dependent performing photosynthesis. 

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When Earth is between the Moon and the Sun, the fully lit face of the Moon is seen from Earth. This phase of the Moon is called a ________ moon.A) crescent
B) full
C) gibbous
D) new

Answers

When Earth is between the Moon and the Sun, the fully lit face of the Moon is seen from Earth. This phase of the Moon is called a new moon.

>Crescent --
the first sliver of the Moon that we can see; has illuminated edge                      of the Moon on the right
>Full          --The phase which is the 
brightest in the sky. 
>Gibbous  -- Not yet full moon; 
Moon is more illuminated that half,

A student uses a balance to determine the mass of a feather. Which is most likely to be the correct measurement ?

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Considering how light a single feather is, the measure used should be something for measuring small weights such as a milligram or a gram.

Which is an example of how ecosystem on earth affect each other

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Human ecosystems limit the the growth of other ecosystems due to the pursuit of technology and our own growth.

Answer:

deforestation of rain forest harms other ecosystems

Explanation:

Apex

Since no form of radiation can ever get out of a black hole, how can astronomers detect where black holes are

Answers

Basically gas swirls around the black holes so fast that they heat up and emit rays that can be detected on Earth.

Astronomers can detect X-rays coming from the hot gas and infer that a black hole is present.

Which best describes the process of radiation? A. Warm air transfers heat energy to cold air. B. Sunlight transfers energy to land, air, or water. C. Cold air transfers heat energy to warm air. D. Reflections from the surface warm the atmosphere.

Answers

The correct answer is option D

Reflections from the surface warm the atmosphere.

Reason -Radiation is the process by which the earth radiates the heat absorbed by it during the day time. The earth absorbs the solar radiation during the day time and gets heated , during evening the earth emits the heat in the form of reflections i.e radiation due to which the hearth gets further heated up.

I believe the answer is C. Cold air transfers heat energy to warm air. I don't know how great I can describe the answer but there you go

All of the following are functions of human skin, except A. absorbing mineral reserves, water, and waste. B. releasing excess heat to regulate body temperature. C. protecting the skin from pathogens. D. gathering information about the environment.

Answers

D.gathering information about the environment 
All of the following are functions of human skin, except D. gathering information about the environment. human skin can not do that.