What is the rock cycle? a) the cooling of lava and magma to form rocks b) the tracing of rocks through the four spheres of earth c) the continuous processes by which rocks change form d) the weathering, erosion, and deposition of rocks

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Rainbow trout is non- native to the united states. however this species is breeding with the native gula yltrout acientistrecently observed that the hola trout were becoming exitinct what is the cause of their extinction

What is the longest river in central asia, and which countries does it border