I WONDER - What Are Tectonic Plates?

The video explains the Earth's lithosphere, which consists of the crust and part of the upper mantle. It describes how tectonic plates, which are about 100 kilometers thick, move slowly on the Earth's mantle. There are two main types of tectonic plates: oceanic and continental. Oceanic plates are found under the ocean floor and are made of silicon and magnesium, while continental plates lie beneath the land and are composed of silicon and aluminum.

What is the lithosphere composed of?

• The Earth's core and lower mantle

• The Earth's atmosphere and hydrosphere

• The Earth's crust and part of the upper mantle

• The ocean floor and continental crust

How do tectonic plates move?

• They float on the Earth's core

• They move rapidly across the Earth's surface

• They are stationary and do not move

• They move slowly on the melted layer of the mantle

What is the approximate thickness of tectonic plates?

• 10 kilometers

• 200 kilometers

• 50 kilometers

• 100 kilometers

Where are oceanic plates located?

• On the Earth's surface

• Underneath the ocean floor

• Above the continental crust

• In the Earth's core

What elements make up the continental crust?

• Iron and nickel

• Carbon and oxygen

• Silicon and aluminium

• Silicon and magnesium