The video explains Earth's structure by comparing it to a pear, with the crust, mantle, and core. It discusses how volcanoes work, using a demonstration with a balloon to show pressure buildup. The video also explains how scientists study lava to understand Earth's interior.

What part of the Earth is compared to the skin of a pear?

• Crust

• Outer Core

• Mantle

• Core

How do scientists learn about the Earth's interior?

• By using telescopes

• By analyzing ocean currents

• By studying volcanic eruptions

• By digging deep into the Earth

What is the term for the hot, melted material inside the Earth?

• Sediment

• Magma

• Ash

• Lava

What happens to the air molecules inside a balloon when heated?

• They disappear

• They move away from each other

• They stay the same

• They move closer together

What is the main cause of pressure build-up inside the Earth leading to volcanic eruptions?

• Earthquakes

• Cold temperatures

• High temperatures

• Low pressure

What role do gases play in volcanic eruptions?

• They prevent eruptions

• They cool down the magma

• They create pressure that leads to eruptions

• They solidify the lava

What is the outer layer of the Earth compared to in the balloon demonstration?

• The balloon's air

• The balloon's string

• The balloon's color

• The balloon's outer layer

What happens when the Earth's crust is under too much pressure?

• It becomes thicker

• It cracks and causes a volcanic eruption

• It contracts

• It expands

What is the difference between magma and lava?

• Magma is solid, lava is liquid

• Magma is found in oceans, lava is found on land

• Magma is cold, lava is hot

• Magma is inside the Earth, lava is outside

Why do scientists study lava?

• To find new minerals

• To understand Earth's interior

• To predict weather patterns

• To measure Earth's age