Radiometric dating is possible because ____
A)daughter isotopes are lost
B)decay constants do not change
C)experimental and sample error is negligible
D)parent isotopes are gained
E)metamorphic and igneous rocks are made of crystals
B
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Which of these equal volumes expands more when the temperature is increased?
A. iron. B. wood. C. ice water. D. helium.
Above which of the following continents is the ozone hole observed?
A. North America B. Antarctica C. South America D. Australia
What are Maroon societies and how do they provide a strong reflection of African roots in the Caribbean today?
What will be an ideal response?
Which of the following statements regarding the benefits coral reefs provide to people is correct?
A) Coral reef tourism provides some countries with over 50% of their gross national product. B) About 300 million people worldwide depend on healthy reef systems. C) Fisheries associated with coral reefs supply more than one fourth of all fish from the sea. D) Coral reefs protect coasts from volcanoes, storm waves and tsunami. E) Coral reefs contain about twice as much algal biomass as animal biomass.