People's Education Press High School Geography Compulsory Course 1: Cosmic Quest

Imagine yourself floating in the vast emptiness of space, facing a blue jewel captured by the Fengyun-4 satellite. Though it doesn't glow brightly on its own, it shines due toreflecting sunlightmaking it dazzling. This planet does not exist in isolation—it is a tiny yet precise gear within the vast cosmic machine.

Core Geographic Concepts

Celestial Body: Forms of matter in the universe, such as nebulae, stars (like the Sun), planets (like Earth), and satellites.
Celestial System: Gravitational forces and perpetual motion cause celestial bodies to attract and revolve around each other, forming hierarchical systems like the Earth-Moon system, Solar System, and Milky Way.
Light-year: The distance light travels in one year, approximately 9.46 trillion kilometers—a 'giant ruler' for measuring interstellar space.

Earth's Commonality

Regardless of its distance from the Sun (third planet), size, mass, or orbital characteristics such as near-circularity and coplanarity, Earth is merely acommon planet. It is precisely this unremarkable position and stable environment that gave rise to extraordinary life.

Spatial Observation Logic

By using the 'fist estimation method' to locate the Moon or observing real images from the Fengyun-4 satellite, we can transform abstract celestial coordinates into tangible, everyday geographical phenomena—this embodies the core of geographic practical skills.

QUESTION 1

What kind of cosmic environment is Earth in?

Isolated in empty space, with no associated celestial bodies

Safe and stable: planets follow their own paths, existing within multi-tiered celestial systems

Located at the center of the Milky Way

QUESTION 2

Why does Earth appear bright when viewed from space? What does this primarily indicate?

Earth is a star like the Sun, capable of emitting its own light

Earth reflects sunlight, indicating it lies within the Solar System and is relatively close to the Sun

Glow produced by chemical reactions in Earth’s atmosphere

QUESTION 3

In astronomical observation, which of the following correctly describes the daily pattern of lunar shape (phases)?

The Moon's shape changes daily because the Moon itself grows and shrinks

The Moon's position relative to the stellar background remains unchanged

Changes in the relative positions of the Moon, Earth, and Sun cause lunar phases to shift

QUESTION 4

By analyzing historical records of sunspot numbers, we can determine their average cycle duration to be approximately:

1 year (seasonal cycle)

11 years (regular cycle)

50 years (long-term cycle)

QUESTION 5

Based on Earth's evolutionary history, order the following elements: ① Cyanobacteria ② Invertebrates ③ Ferns ④ Increase in oxygen ⑤ Reptiles

①→④→②→③→⑤

①→②→③→④→⑤

④→①→②→⑤→③