Molecules of air heated by the sun that causes them to speed up and collide often is called

answer; i believe that the correct answer is (light);

the answer is:

carbon dioxide

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.