Plate Tectonics and Boundaries

Match each type of plate boundary with its correct description.

• Boundary where two plates move away from each other

• transform

• Boundary where two plates slide past each other horizontally

• divergent

• Boundary where one plate moves under another

• subduction

• Boundary where two plates move toward each other

• convergent

Tags

NGSS.MS-ESS2-3

Match each geological feature with the type of plate boundary where it most commonly forms.

• Forms at a divergent boundary between two oceanic plates.

• trench

• Forms at a convergent boundary between two continental plates.

• mid-ocean ridge

• Forms at a convergent boundary between an oceanic plate and a continental plate.

• rift valley

• Forms at a divergent boundary between two continental plates.

• mountain

Tags

NGSS.MS-ESS2-3

Which type of crust is more dense?

• oceanic

• continental

• divergent

• pizza

Answer explanation

Oceanic crust is more dense than continental crust due to its composition, primarily basalt, which is heavier than the granite that makes up continental crust. This density difference is why oceanic crust lies lower than continental crust.

The type of boundary that occurs when two plates move toward each other is called a (a)   .

• convergent

• divergent

• transform

• lateral

Answer explanation

The correct answer is 'convergent' because this type of boundary occurs when two tectonic plates move toward each other, often leading to subduction or mountain formation.

Tags

NGSS.MS-ESS2-3

A long chain of undersea mountains

a

sea floor spreading

mid ocean ridge

oceanic plates

Tags

NGSS.MS-ESS2-3

the plates where these plates meet are called plate boundaries

• plate boundaries

• lithosphere

• boundary lines

• tectonic boundaries

Answer explanation

The correct answer is 'lithosphere' because it refers to the rigid outer layer of the Earth, which includes the crust and upper mantle, where tectonic plates meet at their boundaries.

oceanic plates

• when an oceanic plate collides with other plate either continental or oceanic, sebduction of the denser plate occurs

• lithospheric plates

• tectonic plates

• continental plates

Answer explanation

The correct choice explains that when an oceanic plate collides with another plate, subduction occurs, where the denser oceanic plate is forced beneath the other plate, highlighting the dynamic nature of tectonic interactions.

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

answer the 4 questions down below

• boundaries where tectonic plates slide past each other horizontally

• convergent boundaries

• the process of one tectonic plate sliding beneath another

• subduction
• tectonic plates that make up the ocean floor

• continental plates
• tectonic plates that make up the continents

• transform boundaries

• boundaries where tectonic plates collide or come together

• oceanic plates

Tags

NGSS.MS-ESS2-3

Mountains are formed at ______ plate boundaries

• transform

• divergent

• convergent

• None of the above

Answer explanation

Mountains are primarily formed at convergent plate boundaries, where tectonic plates collide, causing the Earth's crust to fold and uplift, leading to mountain formation.

Tags

NGSS.MS-ESS2-2

The theory of ______ states that the Earth is broken up into pieces that move because of convection currents that happen in the asthenosphere

• volcanoes

• sea floor spreading

• continental drift

• Plate tectonics

Answer explanation

The theory of Plate tectonics explains that the Earth's lithosphere is divided into tectonic plates that float on the semi-fluid asthenosphere, driven by convection currents, leading to their movement.

Tags

NGSS.MS-ESS2-3