Early earth quiz which of the following gases was most likely present in earth’s earliest atmosphere? a. nitrogen. b. hydrogen. c. argon. d. oxygen.

They refer to Hydrogen as the elemental building block of life. Part of the reason for this is because scientists believe that it was present in the early stages of Earth's atmosphere, and helped form many of the things that live on Earth today. Hope this helps!

B. Hydrogen

I'm pretty sure it's Nitrogen.

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.