Convection Currents and Earth's Dynamic Surface

The video demonstrates convection currents using a model with food coloring and a light bulb. It explains how these currents, similar to those in boiling water, drive the movement of Earth's tectonic plates, creating features like ridges and trenches. The uneven heating of the mantle by the core reshapes Earth's surface, and similar processes occur in the atmosphere.

What is the purpose of using food coloring in the demonstration?

• To make the water look colorful

• To represent the Earth's crust

• To visualize the movement of convection currents

• To change the temperature of the water

In the demonstration, what does the light bulb represent?

• The Earth's oceans

• The Earth's atmosphere

• The Earth's core heat

• The Earth's crust

What material does the water in the demonstration represent?

• The Earth's atmosphere

• The Earth's mantle

• The Earth's core

• The Earth's crust

What geological feature is formed at divergent boundaries?

• Earthquakes

• Mountains

• Mid-Atlantic Ridge

• Volcanoes

What happens to the crust where convection currents rise?

• It forms a trench

• It sinks back down

• It remains stationary

• It is pushed in the direction of the current

What causes the Earth's surface to be constantly reshaped?

• The gravitational pull of the moon

• The uneven heating of the mantle by the core

• The rotation of the Earth

• The movement of tectonic plates

How is the concept of convection in the Earth's mantle similar to that in the atmosphere?

• Both are caused by the Earth's rotation

• Both occur only at the Earth's surface

• Both involve the movement of solid materials

• Both involve the rising of warm material and sinking of cool material

What is the result of convection currents diving back toward the core?

• Formation of mountains

• Increase in atmospheric pressure

• Creation of trenches

• Expansion of the Earth's surface