Question

practice it! select the statement(s) that are true about the mantle. the mantle is the outermost layer of the earth and is made of basalt and granite. the mantle is directly below the crust. the mantle is very hot and is made of liquid rock. convection in the mantle moves tectonic plates on the crust. the mantle is the thickest layer at about 3,000 kilometers thick.

Explanation:

1. Analyze the first statement: The outermost layer of the Earth is the crust, not the mantle. The mantle is beneath the crust. Also, the crust (not the mantle) has parts made of basalt (oceanic crust) and granite (continental crust). So this statement is false.
2. Analyze the second statement: The mantle is located directly below the Earth's crust. This is a correct fact about the Earth's structure.
3. Analyze the third statement: The mantle is composed of solid rock (though it can flow slowly over long periods, it's not liquid rock; liquid rock is in the outer core). So this statement is false.
4. Analyze the fourth statement: Convection currents in the mantle are responsible for the movement of tectonic plates on the crust. This is a key concept in plate tectonics, so this statement is true.
5. Analyze the fifth statement: The mantle is indeed the thickest layer of the Earth, with a thickness of about 2900 - 3000 kilometers (the range can vary slightly in different sources, but around 3000 km is a common approximation). So this statement is true.

Answer:

• The mantle is directly below the crust.
• Convection in the mantle moves tectonic plates on the crust.
• The mantle is the thickest layer at about 3,000 kilometers thick.