A sample of wood from an old Egyptian tomb is found to have a carbon-14 activity of 7.07 disintegrations per minute per gram of C, while a sample of wood from a newly-cut tree has a carbon-14 activity of 15.3 disintegrations per minute per gram of C. The half-life of carbon-14 is 5730 years. Calculate the age of the old wood

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic

The element that has the greatest electronegativity is