Scientists find dense rock on earth's surface that is made of magnesium and smaller amounts of silicon. what layer of earth might the rock scientists study?

Oh the answer is the Mantle, You can look at a chart and easily find the answer if you don't believe me. But here is a reasoning; Magnesium as well as Aluminum are located within the Mantle.

From the crust or mantle
1. By studying things from Earths layers that have been pushed up through the cracks of the crust.

2.By measuring diffrent kinds of vibration from earthquakes

3.By doing laboratory expirements

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.