#1 What is the average density of the earth?
The density of the Earth is 5.513 g/cm3.
#2 Consider the following statements— 1. The whole core is in a molten state. 2. The outer core is in a solid state and the inner core is in a molten state. 3. The outer core is in a molten state and the inner core is in a solid state. 4. The whole core is in a solid state. Which of the following is true? Codes :
The outer core of the Earth is a liquid layer about 2,260 kilometers thick. It is made of iron and nickel. This is above the Earth’s solid inner core and below the mantle.
#3 Which of the following is present in the largest amount in terms of percent by mass in the earth’s crust ?
The most common chemical elements in the crust are oxygen (46.6%), silicon (27.7), aluminum (8.1), iron (5.0), calcium (3.6), potassium (2.8), sodium (2.6), and magnesium (2.1).
#4 Quartz composed of which two elements—
Quartz is a mineral composed of silicon and oxygen atoms
#5 The most abundant metal in the earth’s crust is:
Most abundant element is Oxygen followed by Silicon. Both of these are non-metals. Silicon is followed by Aluminium which is most abundant metal