for better research go to under NOAA - Climate.gov
This is a short paraphrased summary of the article about ice cores in that website.
Answer: Researchers in labs may melt or crush bits of the ice core a little at a time, each deeper layer shows the time in the Earth's climate history. Tiny pieces of pollution, metals, radoiactive fallout, pebbles, sea salt, volcanic ash and even air bubbles all present important information that researchers can look for to track changes in the atmosphere's composition and temperature.
increases by 1 every time
The correct answer is - False.
The Boreal forest is part of the Taiga biome, not of the Alpine one. It is located on the northern hemisphere, form Norway to the Pacific coast of Russia, and from the pacific to the Atlantic coast of the northern half of North America and it occupies the biggest space compared to any other biome in the world. It is a place where there's short humid summers, and very long, extremely cold, snowy winters. It is a biome where the coniferous forest dominates, and some of the animals that live here are the lynx, bears, wolfs, elk, deer, moos...
