What's the definition of altitude?

Asimply means that over time there was some sort of change.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

Which notation is used to represent an alpha particle? a. b. c. d.