29.03.21 G8 Social Studies: Constructive Plate Boundaries

The pieces of Earth's crust are called what?

• Plates

• New crust

• Plate boundary

• Magma

What move Earth's plates?

• Earthquakes and volcanoes
• Under the sea
• Convection currents
• Chains of underwater volcanoes

The movement of the plates is called what?

• Convection currents

• Under the sea

• Earthquakes

• Plate tectonics

The point where two plates meet is called a?

• Plate boundary
• Convection currents
• Because when the magma reaches the surface, it cools and solidifies to form new crust. New crust is therefore constructed
• Plates

Which TWO natural disasters happen at plate boundaries?

• At a constructive plate boundary
• Earthquakes and volcanoes
• Earthquakes
• Chains of underwater volcanoes

At which plate boundary do plates move apart very slowly?

• Because over time, the new crust builds up to form a volcano
• At a constructive plate boundary
• Earthquakes and volcanoes
• Chains of underwater volcanoes

What moves the plates apart very slowly?

• Convection currents
• At a constructive plate boundary
• Chains of underwater volcanoes
• Under the sea

Why are South America and Africa are moving apart at 3cm per year?

• Because the South American and African plates are on a constructive plate boundary
• Chains of underwater volcanoes
• Under the sea
• Because over time, the new crust builds up to form a volcano

What is hot liquid rock below the surface of Earth?

• Convection currents
• Magma
• Earthquakes and volcanoes
• Under the sea

What rises from the mantle as the plates move apart?

• Convection currents
• Under the sea
• Magma
• Chains of underwater volcanoes