Earth's Structure & Layers MCQs with Answers

Past Paper MCQ

Low silicon, oxygen and high iron, magnesium are the characteristics of _ magma.

• A.Mafic and Basaltic
• B.Felsic and Granitic
• C.Intermediate and Andesitic
• D.Ultramafic and Peridotitic

Which describes the rocky parts of the Earth’s crust (or lithosphere) and its historic development?

• A.Geology
• B.Geography
• C.Geomorphology
• D.Pedology

The biggest part of the earth by volume is the mantle. The thickness of the mantle is about ?

• A.5000 km
• B.3500 km
• C.1200 km
• D.2900 km

How do scientists know that the Earth's core is made up of metal?

• A.Deep drilling has reached the core and brought back metal samples
• B.Volcanic eruptions bring molten metal to the surface regularly
• C.The density of the surface layer of earth is much less than its average density
• D.Magnetic compasses point directly to the metal core

The volume of internal core of the earth is about ?

• A.60%
• B.30%
• C.45%
• D.15%

The outermost layer of Earth is called ?

• A.Mantle
• B.Asthenosphere
• C.Core
• D.Crust

Aluminum has % share in the composition of earth.

• A.8.23%
• B.5.10%
• C.2.34%
• D.12.45%

Which one of the following statements is true regarding the structure of the earth?

• A.The crust is the thickest layer of the earth.
• B.The inner core occupies the greatest volume of the earth.
• C.The outer core is the largest layer by volume.
• D.The mantle is the biggest part of the earth by volume.

What is the percentage of oxygen in the Earth's crust?

• A.8.1%
• B.27.7%
• C.46.6%
• D.5.0%

Which of the following is not a layer of Earth?

• A.Crust
• B.Mantle
• C.Magma
• D.Core