Answer : The correct option is, 
Explanation :
The conversion used for the temperature from Fahrenheit to degree Celsius is:

where,
= temperature in Fahrenheit
= temperature in centigrade
The conversion used for the temperature from degree Celsius to Kelvin is:

where,
= temperature in Kelvin
= temperature in centigrade
As we are given the temperature in Fahrenheit is, -10
Now we have to determine the temperature in degree Celsius.



Now we have to determine the temperature in Kelvin.



Therefore, the temperature in degree Celsius and Kelvin are, 
Answer:
Layer 8 is older than layer 1
Explanation:
The density does not affect the earth's interior, the affection of pressure on the earths layers raises the temperature therefore making it have an effect on the layers.
The substance is a mixture of two or more metals is Alloy.