Olympiad Test Level 1: Our Universe - 2 - Class 2 MCQ

The sequence in the increasing order of the size is : A bulb< The Moon < The Earth < The Sun.

Plants make their food in the presence of Sunlight.

The solar system consists of the Sun, in the centre and everything that travels or orbits around, the Sun.

Answer:
The correct answer is option D: Both (a) and (c).
Explanation:
To identify the planet among the given options, we need to understand the characteristics of a planet.
1. The Sun: The Sun is not a planet, it is a star. It is a massive ball of gas that emits light and heat. Therefore, option A is not a planet.
2. The Earth: The Earth is a planet. It is the third planet from the Sun in our solar system. It is a solid, rocky planet with an atmosphere and supports life. Therefore, option B is a planet.
3. The Moon: The Moon is not a planet, it is a natural satellite that orbits around the Earth. It does not have its own source of light and is illuminated by the Sun. Therefore, option C is not a planet.
4. Both (a) and (c): As mentioned above, option A represents the Sun (a star) and option C represents the Moon (a satellite). Since neither the Sun nor the Moon are planets, option D is the correct answer.
In conclusion, the correct answer is option D: Both (a) and (c) because the Sun and the Moon are not planets.

Answer:
A piece of land completely surrounded by water is called an Island.
Explanation:
An island is a landmass that is smaller than a continent and is completely surrounded by water. It can be located in oceans, seas, lakes, or rivers. Islands vary in size, from small ones like islets to larger ones like continents. Here are some key points to understand the concept of an island:
- Definition: An island is a piece of land that is completely surrounded by water.
- Water Surrounding: Islands are usually surrounded by water on all sides.
- Location: Islands can be found in oceans, seas, lakes, or rivers.
- Size: Islands can vary in size, from small islets to large landmasses like continents.
- Examples: Some famous islands include Hawaii, Maldives, Bali, and Manhattan Island.
In conclusion, when a piece of land is completely surrounded by water, it is referred to as an island.

The Earth is a planet.
- The Earth is a celestial body that orbits around the Sun.
- It is part of the solar system, which consists of the Sun, planets, and other objects.
- The Earth is the third planet from the Sun and is located in the habitable zone, also known as the Goldilocks zone, where conditions are suitable for life to exist.
- It has a solid surface and is composed of various layers, including the crust, mantle, and core.
- The Earth has a diverse ecosystem with a variety of plants, animals, and microorganisms.
- It is the only known planet to support life and has a unique combination of factors, such as the presence of water, an atmosphere, and a stable climate.
- The Earth also has a magnetic field that protects it from harmful solar radiation.
- It is constantly changing due to natural processes like plate tectonics, erosion, and weathering.
- The Earth is also home to a wide range of geographical features, including mountains, oceans, rivers, and deserts.
- Humans, along with millions of other species, call Earth their home and rely on its resources for survival.

The Moon travels or orbits around the Earth. It takes about 27 days for the Moon to make one complete travel around Earth.

The Earth moves two ways. It spins and at the same time, it moves around the Sun.

As the Earth spins or rotates, so we have day and night. The side of the Earth that faces the Sun is bathed in light and heat has a day time. The side of the Earth that faces away from the Sun, has a night time.

Both the Moon and the Earth do not emit their own light. They are visible due to the Sun's light, which reflects off their surfaces.

Mercury is the smallest planet and Jupiter is the biggest planet in our solar system.

The Moon does not has its own light whereas others have their own light.

The shape of the Moon appears to change according to how much of it you can see that depends on how much of the bit you can see is facing the Sun.

A plain is a large area of flat land.