ACP Spring Review Layers of the Earth and Rocks

What layer of the Earth is letter A?

• Lithosphere

• Mantle

• Crust

• Core

Answer explanation

• Earth’s crust is the outermost layer.

• It’s thinner under oceans, and thicker under continents.

• It’s mostly made of rocks and minerals.

• The crust is broken into tectonic plates.

• Plates move causing earthquakes, mountain formations and volcanoes.

What layer of the Earth is letter B?

• Crust

• Lithosphere

• Core

• Mantle

Answer explanation

The lithosphere is the solid, outer part of Earth, including the brittle upper portion of the mantle and the crust.

The most well-known feature associated with Earth’s lithosphere is tectonic activity. Tectonic activity describes the interaction of the huge slabs of lithosphere called tectonic plates.

What layer of the Earth is letter C ?

• Core

• Asthenosphere

• Lithosphere

• Mesosphere

Answer explanation

The asthenosphere is part of earth's mantle. It is below the lithosphere and is part of the upper mantle, and behaves as a hot viscous (like a melted plastic) liquid.

It consists of hot, weak material that can be deformed like silly putty. That means it is capable of gradual flow.

What layer of the Earth is letter D?

• Crust

• Inner Core

• Outer Core

• Mantle

Answer explanation

The outer core is made of mostly nickel and iron. It is the only liquid layer of the Earth. It is always at high temperatures ranging from 4,500 degrees Celsius to 6,000 degrees Celsius. The hottest part of the outer core is approximately the same temperature as the sun. The outer core creates Earth's magnetic field, which protects all life on Earth

What layer of the Earth is letter E?

• Crust

• Inner Core

• Outer Core

• Mantle

Answer explanation

The Earth's inner core is a huge metal ball, 2,500km wide. Made mainly of iron, the temperature of the ball is 5,000°C to 6,000°C – that's up to 6,000 times hotter than our atmosphere and scorching enough to make metal melt! The metal at the inner core stays solid because of the incredible pressure surrounding it

What type of plate boundary is shown?

• Divergent

• Convergent

• Transform

• Tectonic Plate

Answer explanation

A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge (underwater mountain range) is an example of divergent plate boundaries.

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Which tectonic plate is marked with an X ?

• African Plate

• Eurasian Plate

• Pacific Plate

• South American Plate

Answer explanation

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The boundary between the Pacific Plate and the Australian plate is a transform boundary. what is likely to occur at this boundary?

• Mountain Formation

• Hurricanes

• Volcanic eruptions

• Earthquakes

Answer explanation

Two plates sliding past each other forms a transform plate boundary.

Earthquakes are common along these faults.

One of the most famous transform plate boundaries occurs at the San Andreas fault

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The boundary between the Pacific Plate and the Australian plate is a transform boundary. what is likely to occur at this boundary?

• Mountain formation

• Hurricanes

• Volcanic eruptions

• Earthquakes

Answer explanation

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Where two tectonic plates converge and move toward each other, which of the following is likely to form as a result?

• Rift Valley

• Mountain range

• rainforest

• arid desert

Answer explanation

1. When two plates come together, it is known as a convergent boundary. The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench

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