universe & solar system section 10 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (a)

Answer: (d)

• Planet Earth has been called the “Blue Planet” due to the abundant water on its surface.
• Pluto, once considered the ninth and most distant planet from the sun, is now the largest known dwarf planet in the solar system. It is also one of the largest known members of the Kuiper Belt, a shadowy disk-like zone beyond the orbit of Neptune thought to be populated by hundreds of thousands of rocky, icy bodies each larger than 62 miles (100 kilometres) across, along with 1 trillion or more comets.
• Moon is the natural satellite of Earth.
• The sun is considered a star because it has all the characteristics of one.

Answer: (d)

Answer: (a)

Continental Drift and Palaeomagretism forms Plate Tectonic Theory.

Plate tectonics is the theory that the outer rigid layer of the earth (the lithosphere) is divided into a couple of dozen “plates” that move around across the earth’s surface relative to each other, like slabs of ice on a lake.

Answer: (c)

A solar eclipse occurs when the moon crosses the path between the sun and the earth. The darkest shadow (where the sun is completely covered) is called the umbra.

The umbra is narrow at the distance of the Earth, and a total eclipse is observable only within the narrow strip of land or sea over which the umbra passes. The partial shadow is called the penumbra.