Which feature causes a gap in the geologic record? extrusion
fault
o intrusion
erosion

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?

Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green