Answer:
The Earth also gives us clues about the levels of greenhouse gases that existed in the past. For example, ancient air bubbles trapped deep in the ice of Greenland and Antarctica reveal how much carbon dioxide was present long ago.
Explanation:I learn it in 8 grade.
What is the full question??
A) The volume of trade between Europe and North America increased
The ratio of starlight to sunlight is much, much smaller than 0.5%. A value of 0.0000001% is far more accurate.
Answer:B
Explanation:
Red star had a lower temperature than yellow-white therefore it is cooler than yellow-white stars
