Increases in ozone in the upper atmosphere may lead to increased occurrence of skin cancer.
Answer the following statement true (T) or false (F)
False
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Strontium-90 is a dangerous isotope because strontium is chemically similar to calcium and is easily incorporated into bone. Sr-90 has a half-life 28.1 years. If a person ingests 100. mg of Sr-90 how much will be left in the person's body after 56.2 years?
A) 75.0 mg B) 50.0 mg C) 25.0 mg D) 12.5 mg
Ocean currents play a significant role in helping to equalize the heat imbalance between the tropical and polar regions
a. True b. False Indicate whether the statement is true or false
The separation of a once continuous population by continental drift is an example of
A) mutation. B) punctuated equilibrium. C) vicariance. D) Lamarckian evolution.
Foehns are warmed by ________
Fill in the blank(s) with the appropriate word(s).