How much thorium 234 will remain after 3 half lives

Latin America includes Question 3 options:

As the sea floor of the Atlantic Ocean spreads, the African Plate moves eastward. Over the last 100 million years, the plate has moved approximately 2,100 kilometers. How many centimeters per year does it move eastward?

Low-latitude regions

What are the physical propertis of plastic

This type of economy is often found in a democracy. A) command economy B) traditional economy C) market economy D) restricted economy

Which location is not a continent? a. The Artic b. South America c. Europe d. Asia

The amount of heat required to raise the temperature of 1 kg of a substance by 1°C is the definition of which term?

If the contour interval of a map were halved, how many contour lines would be needed to show the same increase in elevation? A. half as many B. twice as many C. the same number

The solar system is a diagram of the

What does political and physical maps mean?