Radon and Thoron are the most significant sources of radiation exposure to people living in the United States accounting for 37% of total radiation exposure.
These are nuclides that are produced from the radioactive decay of materials especially in consumer products and through natural processes such as the decay of radium.
Answer:
Most scientists would agree unequivocally that humans have greatly affected the process of evolution, from the rise of antibiotic and pesticide resistance to the largely human-caused increase in the extinction rate. Our effect on the process of evolution even extends to our own species' evolution.
Answer:
Every time a new layer of water is added on the ice, another latyer of ice forms. The longer this happens (the more layers the ice has) the older the ice is. Similar to trees. The older a tree is, the more rings it has
Explanation:
A polymer isA substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together like organic material used as plastic and Resins
The answer to this would be d. :)