Question

Lower mantle is

Thinner than crust
Made of iron and nickel
More firm than the upper mantle
Hotter than the upper mantle

Answer 1

Im gonna say the answer is hotter than the upper mantle

Step-by-step explanation:

I say this bc I use process of elimination I know for a fact its not B or C so its out of A or D and I dont think A is correct so imma go with D

Answer 2

Hotter than the upper mantle

Step-by-step explanation:

The lower mantle temperature, in contrast, reaches over 7,230 degrees Fahrenheit or 4,000 degrees Celsius. Pressure is one great difference between the upper and lower mantle. The viscosity of the upper mantle is greater than the viscosity of the lower mantle. This is because there is less pressure at the upper mantle.