Long-lived radioactive isotope pairs used in radiometric dating have half-lives of the magnitude of
____________________ or ____________________ of years. Fill in the blank(s) with the appropriate word(s).
millions, billions
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One should not expect to see a perfect match between color symbols on a computer screen and a printed map.
Answer the following statement true (T) or false (F)
Some of the world's highest urban densities are found in the Asian region. Which of the following is NOT an area with high urban densities?
a. Hong Kong b. Macao c. Singapore d. Nepal
A weather forecast for the immediate future that employs the trend method is called
a. nowcasting. b. extrapolation. c. first order forecasting. d. linear forecasting. e. persistence forecasting.
Hipparchus developed our present grid system of longitude and latitude
Indicate whether the statement is true or false