Earth Science Quiz

What is the thinnest layer of the earth?

• Outer core

• Crust

• Core

• Mantle

Answer explanation

The thinnest layer of the earth is the Crust.

Which type of rock is formed when molten magma cools down on the earth's surface?

• Intrusive rock

• Metamorphic rock

• Sedimentary rock

• Extrusive rock

Answer explanation

Extrusive rock is formed when molten magma cools down on the earth's surface, making it the correct choice in this case.

What are the main mineral constituents of the continental mass?

• Iron and magnesium

• Silica and magnesium

• Silica and alumina

• Nickel and iron

Answer explanation

The main mineral constituents of the continental mass are silica and alumina.

What is the process of transformation of rocks from one type to another known as?

• Rock cycle

• Rock formation

• Rock evolution

• Rock transformation

Answer explanation

The process of transformation of rocks from one type to another is known as the rock cycle, where rocks undergo various processes like weathering, erosion, deposition, and lithification to form different types of rocks.

Which rock type changes into slate under great heat and pressure?

• Granite

• Sandstone

• Basalt

• Clay

Answer explanation

Clay changes into slate under great heat and pressure, making it the correct choice out of the options provided.

What are minerals used for in industries?

• In fertilizers

• In medicine

• All of the above

• As fuels

Answer explanation

Minerals are used in industries for various purposes such as in fertilizers, medicine, and as fuels, making 'All of the above' the correct choice.

What is the innermost layer of the earth mainly made up of?

• Silica and magnesium

• Iron and alumina

• Nickel and iron

• Silica and alumina

Answer explanation

The innermost layer of the earth is mainly made up of nickel and iron, not silica and magnesium, iron and alumina, or silica and alumina.

Which rock type is made up of grains of sand?

• Basalt

• Granite

• Marble

• Sandstone

Answer explanation

Sandstone is the rock type made up of grains of sand, distinguishing it from the other options provided.

What are the three major types of rocks?

• Basalt rocks, Limestone rocks, Slate rocks

• Granite rocks, Marble rocks, Sandstone rocks

• Igneous rocks, Metamorphic rocks, Sedimentary rocks

• Intrusive rocks, Extrusive rocks, Sedimentary rocks

Answer explanation

The three major types of rocks are Igneous rocks, Metamorphic rocks, and Sedimentary rocks.

What are fossils?

• Layers of rocks

• Minerals found in rocks

• Transformed rocks

• Remains of dead plants and animals trapped in rocks

Answer explanation

Fossils are the remains of dead plants and animals trapped in rocks, distinguishing them from layers of rocks, minerals, or transformed rocks.