What is the elevation of point A 1400 ft
1500ft
1600ft
1700ft
topographic maps

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.

i thinking chemical change

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex