Structure of the Earth：练习题

What is the fundamental force that maintains the stable orbit of the Earth around the Sun and the Moon around the Earth?

Which statement best explains the relationship between the mantle and magma as described in the syllabus?

The Moon is defined as a natural satellite. What governs its orbital path around the Earth, and how does this differ from the Earth's own path?

What is the primary composition and physical state of the Earth's mantle, based on the structure of the Earth?

According to the syllabus, how is the Earth classified in its relationship with the Sun, and what path does it follow?

The Earth's structure includes a solid inner core and a liquid outer core. Describe the composition and physical state of the outer core and briefly explain its significance regarding Earth's magnetic field.

Contrast the primary material found in the Earth's crust with the primary material found in the core.

Describe the two distinct physical states of the Earth's iron core and explain the phenomenon it creates that extends around the planet.

a) Describe the three main layers of the Earth's structure, starting from the outermost layer to the innermost layer. For each layer, briefly state its primary composition and physical state.

b) Explain the role of the Earth's core in generating a significant physical phenomenon that protects our planet.

The core of the planet is a region of extreme conditions and specific chemical composition.
(a) Explain the difference in the physical state between the two components of the Earth's core.
(b) Name the primary element of the core and describe the phenomenon it creates that extends beyond the Earth's surface.