MOCK TEST

1. What is the outermost layer of the Earth called?

• Mantle

• Core

• Crust

• Lithosphere

Answer explanation

The outermost layer of the Earth is called the crust. It is the solid surface layer where we live, distinct from the underlying mantle and core.

2. Which type of rock primarily makes up the continental crust?

• Igneous

• Sedimentary

• Metamorphic

• All of the above

Answer explanation

The continental crust is composed of various rock types, including igneous, sedimentary, and metamorphic rocks. Therefore, the correct answer is 'All of the above' as all these rock types contribute to the continental crust.

3. Who was the Mohorovičić discontinuity named after?

• A famous geologist named Alfred Wegener

• The Croatian seismologist Andrija Mohorovičić

• The American geologist Charles Lyell

• The Russian scientist Dmitri Mendeleev

Answer explanation

The Mohorovičić discontinuity is named after the Croatian seismologist Andrija Mohorovičić, who discovered this boundary between the Earth's crust and the underlying mantle in 1909.

4. The mantle consists of ______.

• semiliquid rock

• Liquid state

• Discontinuity

• Earth

Answer explanation

The mantle consists of semiliquid rock, which allows for the movement of tectonic plates. This characteristic distinguishes it from other layers of the Earth, making 'semiliquid rock' the correct choice.

5. Landforms on Earth's crust were formed as a result of______.

• Earth's rotation

• Many bodies of water

• Movement of tectonic plates

• Division of the lithosphere

Answer explanation

Landforms on Earth's crust were primarily formed by the movement of tectonic plates, which causes shifts, collisions, and separations, leading to the creation of mountains, valleys, and other geological features.

6. Volcanoes are mainly found in areas on Earth where ______.

• Plates collide

• Rivers are found

• Mountain are found

• Plates fit together perfectly

Answer explanation

Volcanoes are primarily found where tectonic plates collide, as this creates the conditions for magma to rise to the surface. Other options do not directly relate to volcanic activity.

7. What is usually observed before a volcanic eruption?

• Dry air is felt

• Rains become frequent

• Floods and tsunamis occur

• Seismic activities occur more frequent

Answer explanation

Before a volcanic eruption, seismic activities occur more frequently due to the movement of magma underground. This increase in earthquakes is a key indicator of an impending eruption, making it the correct choice.

8. Volcanic eruption and earthquakes occur in the Philippines because the region is _______.

• Volcanic in origin

• Located in the equator

• Composed of many island

• Located in the Pacific Ring of Fire

Answer explanation

The Philippines is located in the Pacific Ring of Fire, an area known for its high volcanic and seismic activity due to tectonic plate movements. This makes 'Located in the Pacific Ring of Fire' the correct answer.

9. Where does the first motion of an earthquake occur?

• Continent

• epicenter

• Focus

• Fault

Answer explanation

The first motion of an earthquake occurs at the focus, which is the point within the Earth where the earthquake originates. The epicenter is directly above the focus on the surface, but the focus is where the seismic waves begin.

10. What theory explains the formation of Earth's crust and its movement?

• Continental drift

• Plate tectonics

• Magnetic polarity

• Seafloor spreading

Answer explanation

Plate tectonics is the theory that explains the formation and movement of Earth's crust through the interaction of tectonic plates. It encompasses concepts like continental drift and seafloor spreading, making it the correct choice.