3rd Grade ICSE

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Last edited 37 days ago by Learn LoopHQ.

Chapter: 15. The Solar System

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Question 1 (Answers)

The Moon is the natural satellite of the Earth, meaning it is an object that goes around the Earth in its orbit.

We can tell the Moon does not produce its own light because it is shown reflecting sunlight, indicating that its luminosity comes from an external source, the Sun.

A significant feature visible on the Moon’s surface are the large pits, which are called craters. The Moon’s environment has no air or water, which is why nothing can live or grow there.

Question 2 (Answers)

The picture shows our solar system. Its main components are the Sun, which is the central star, and its family of eight planets, along with their satellites, and also pieces of rocks, dust, and gases that travel around the Sun.

Jupiter is depicted as the largest planet in the image, characterized by its immense size. Mercury, being the planet closest to the Sun and visibly much smaller than the others, represents the smallest planet.

Earth is depicted as a blue and green planet, earning it the name “blue planet” because of its oceans, and it is known as a living planet. Mars is shown with a reddish hue, which is why it is called the “red planet” due to its surface being covered with red dust.

Question 3 (Answers)

The satellites shown orbiting Earth in this image are artificial satellites, meaning they are man-made objects. They differ from natural satellites, like the Moon, which are naturally occurring heavenly bodies orbiting a planet.

Based on the signals emanating from them, a key function these satellites perform is making communication possible, such as through television, telephone, and radio signals.

Besides communication, artificial satellites also help us by providing a lot of information about other planets and by helping us predict the weather.

Question 4 (Answers)

The bright, twinkling objects seen in this night sky are stars. They are made of hot gases and have their own light and heat.

The patterns formed by groups of stars are called constellations. Examples shown or implied could be Orion and the Great Bear (Ursa Major).

A larger structure formed by a group of thousands of stars is called a galaxy. Our solar system belongs to the Milky Way galaxy.

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