HELP ASAP PLEASE...According to the mantle plume theory, what causes hot spots?

A. Thin places in the seafloor crack.

b. An upwelling of magma from the mantle gathers close to the Earth’s surface.

C. Chimney-like hydrothermal vents form on the seafloor.

D. Oceanic plates are subducted and volcanoes form.

What is i fracture in the crust called when land move up, down or sideways

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

Which of the following describes a situation where competition between producers exists