Which of the following statements is true?

Question

Extrusive rocks form when magma cools deep below Earth's surface.
Rocks with crystals larger than 1/2 mm have a fine texture.
The crust beneath Earth's oceans is made of granite.
Rocks that solidify at high temperatures have high levels of iron (Fe).

Answer 1

The true statement among the options provided is:

"Rocks that solidify at high temperatures have high levels of iron (Fe)."

To clarify the other statements:

• Extrusive rocks form when magma cools quickly at or near Earth's surface, not deep below the surface (that would be intrusive rocks).
• Rocks with crystals larger than 1/2 mm typically have a coarse texture, not a fine texture.
• The crust beneath Earth's oceans is primarily made of basalt, not granite. Granite is typically found in continental crust.