1) deep trenches
2) active volcanoes
3) arcs of islands along the tectonic boundaries
4) in some cases, mountain ranges
Answer:
5.physical change
6.chemical change
7.physical change
8.conservation of mass
9.thermal energy
10.physical change
I honeslty dont know if this is right
explanation:
Physical properties of metal include shiny, ductile, opaque, malleable and good conduction of heat and electricity
It's difficult to write it down, but I'll attach you a good example of hydroboration of indene. I hope you'll find it helpful.