Sea floor spreading adds more crust to the ocean floor and at the same time older strips of rock move outward from either side of the ridge.
Answer:
Developing countries are more vulnerable to natural disasters because people live in areas at high risk from natural disasters (e.g., unsafe urban areas), the housing is poorly built and can be easily damaged in the event of a disaster, countries are not equipped with early warning systems, and they have few assets and ...
America is an example of a multicultural country or a "melting pot"; some things you'll see in the states are different cultural food for example Taco Bell has Mexican food, Panda Express has Chinese food, and a hotpot place would serve Korean food. You'd also most likely find multilingual people
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.
