The earths crust is
1. heavier
2.softer
3.thicker
4.thinner

What is the difference between an igneous, sedimentary and metamorphic rock

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?