What is the evidence that the outer core consists mostly of liquid iron? What is the evidence that the outer core contains elements other than iron?
What will be an ideal response?
The P- and S-wave shadow zones imply a liquid outer core. The evidence that it consists mostly of iron include: 1) iron is the only common element that accounts for the high density of the core; 2) liquid iron is consistent with Earth's magnetic field; 3) iron meteorites may be analogs for Earth's core. The evidence that the outer core contains elements other than iron is based on density measurements. The outer-core density is less than pure iron and probably contains some lighter elements such as oxygen, sulfur, silicon, potassium, or hydrogen.
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Answer the following statement(s) true (T) or false (F)
1. The chemicals needed by the Green Revolution have polluted India's environment. 2. India was forced to join the global economy after the collapse of the Soviet Union. 3. The number of states in India has remained the same since independence. 4. An expanding industry in Bangladesh is garment manufacture. 5. Sri Lanka has a diversified industrial base.
What is dark matter and why are scientists looking for it?
What will be an ideal response?
Feeding America programs in the United States represent
A) a personal level safety net. B) a family level safety net. C) a national level safety net. D) a global level safety net.
How could a researcher use magmatic differentiation to determine if a batholith is the result of one body of magma cooling and crystallizing or multiple bodies of magma?
What will be an ideal response?