1) The occurrence of high-heat flows at the ridge center provides evidence of the A) destruction of the continental crust
B) destruction of the oceanic crust
C) existence of rising mantle convection currents
D) existence of ancestral mountains

What happens to isotopes that are unstable?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers