One challenge to understanding Earth's geologic history is Most ancient ocean plates have been destroyed by subduction

Plate tectonics causes uplifting

Continents collide and destroy fossil evidence

There are few continental plates older than 200 million years old

Continents collide and destroy fossil evidence

Explanation:

One main challenge in understanding earth's geologic history is that continents collide and destroy fossil evidence.

Fossils are the preserved remains of dead organisms found in rocks. They are very good and useful indicators of the life of an organism. By studying the progression of their evolution, a vivid understanding of the earth's geologic history can be constructed.

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If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.