Question
Earth is made of four layers, each with a different composition. Which of the following is true about one of the layers of Earth?
a
Density of the crust is greater than the density of the mantle.
b
Convection in the mantle results in movement of tectonic plates.
c
Movement of liquid metal in the inner core creates Earth’s magnetic field.
d
Intense pressure from the layers above results in solid outer core.
a
Density of the crust is greater than the density of the mantle.
b
Convection in the mantle results in movement of tectonic plates.
c
Movement of liquid metal in the inner core creates Earth’s magnetic field.
d
Intense pressure from the layers above results in solid outer core.
Answers
GPT-4o mini
The correct statement about one of the layers of Earth is:
**b. Convection in the mantle results in movement of tectonic plates.**
This is true because the convection currents in the semi-fluid asthenosphere of the mantle drive the movement of the tectonic plates located in the lithosphere above it.
To clarify the other options:
- **a. Density of the crust is greater than the density of the mantle.** This is false; the mantle is denser than the crust.
- **c. Movement of liquid metal in the inner core creates Earth’s magnetic field.** This is misleading; it is the movement of liquid metal in the outer core that generates the Earth's magnetic field, while the inner core is solid.
- **d. Intense pressure from the layers above results in solid outer core.** This is false; the outer core is actually in a liquid state due to high temperatures, despite the pressure. The inner core is solid due to the combined effect of very high pressure and temperature.
**b. Convection in the mantle results in movement of tectonic plates.**
This is true because the convection currents in the semi-fluid asthenosphere of the mantle drive the movement of the tectonic plates located in the lithosphere above it.
To clarify the other options:
- **a. Density of the crust is greater than the density of the mantle.** This is false; the mantle is denser than the crust.
- **c. Movement of liquid metal in the inner core creates Earth’s magnetic field.** This is misleading; it is the movement of liquid metal in the outer core that generates the Earth's magnetic field, while the inner core is solid.
- **d. Intense pressure from the layers above results in solid outer core.** This is false; the outer core is actually in a liquid state due to high temperatures, despite the pressure. The inner core is solid due to the combined effect of very high pressure and temperature.