The Solar System MCQ Practice

The Moon is a natural satellite because it orbits around the Earth. It is not a star because it does not emit its own light and heat. It is not a planet because it does not orbit around the Sun. It is not an asteroid because it is not a small rocky object in space.

The atmosphere acts as a layer that protects the Earth from harmful rays of the Sun. It contains various gases that absorb and scatter the Sun's ultraviolet (UV) radiation, preventing it from reaching the Earth's surface in excessive amounts. The ozone layer, which is part of the atmosphere, plays a crucial role in absorbing most of the Sun's harmful UV radiation. Without the atmosphere, the Earth would be exposed to intense UV radiation, leading to detrimental effects on life forms and the environment.

Mercury is the planet nearest to the Sun in the Solar System.

The correct answer is Venus, Mars, Saturn, Uranus. The planets in the Solar System are arranged in order of their distance from the Sun. Venus is the second planet from the Sun, Mars is the fourth planet, Saturn is the sixth planet, and Uranus is the seventh planet.

The reason the Moon appears bigger than the Sun from Earth is that the Moon is closer to the Earth. Distance plays a crucial role in how objects appear in the sky. Even though the Sun is much larger than the Moon, its distance from Earth makes it appear smaller in comparison. Since the Moon is relatively closer to the Earth, it appears larger in the sky.

The planets in the Solar System do not have their own source of light, so they rely on reflecting light from another object. The Sun is the primary source of light in the Solar System, emitting vast amounts of light and heat. The planets reflect this light from the Sun, allowing us to see them in the night sky.

Mercury has the highest surface temperature among the given options. This is because it is the closest planet to the Sun, and its thin atmosphere cannot retain heat, causing extreme temperature variations. During the day, temperatures can reach up to 800 degrees Fahrenheit (430 degrees Celsius), while at night, temperatures can drop to -290 degrees Fahrenheit (-180 degrees Celsius). This extreme temperature range makes Mercury the hottest planet in our solar system.

The correct answer is "i and iii." Statement i is true because the Moon is indeed the Earth's natural satellite. Statement iii is true because there is no oxygen on the Moon, making it unable to support life.

Venus does not have any natural satellites. While Jupiter, Uranus, and Neptune all have multiple natural satellites, Venus does not have any. This is a unique characteristic of Venus compared to the other listed planets.

How many planets are there in our solar system?

ChatGPT

There are eight recognized planets in our solar system. In order of their distance from the Sun, they are:

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

Pluto was considered the ninth planet until 2006 when it was reclassified as a "dwarf planet" by the International Astronomical Union (IAU).

The statement "Jupiter is the largest planet" is true because Jupiter is the largest planet in our solar system. The statement "the size of the Sun is about 100 times relative to the size of the Earth" is also true as the Sun is approximately 100 times larger than Earth in terms of diameter. Lastly, the statement "the distance of a planet from the Sun will affect how hot or cold it is" is true because the distance from the Sun determines the amount of sunlight and heat a planet receives, thus affecting its temperature. Therefore, the correct answer is i, iii, and iv.

Saturn has the most number of natural satellites compared to the other listed planets. It is known to have 146 moons. Some of Saturn's moons are quite famous, such as Titan and Enceladus. These moons vary in size, composition, and characteristics, making Saturn a fascinating planet with a diverse satellite system.

A meteorite is the correct answer because when a meteoroid (a small piece of rock or metal from space) enters the Earth's atmosphere and survives the intense heat and friction, it is called a meteorite. When a meteorite impacts the Earth's surface, it can create a large crater due to the force and energy released upon impact. Comets, planets, and asteroids can also collide with the Earth, but in this case, a meteorite is specifically mentioned as the cause of the big crater formation.

When an object enters the Earth's atmosphere and burns brightly, it is known as a meteor. Meteors are small celestial bodies that burn up upon entering the Earth's atmosphere, creating a streak of light in the sky commonly referred to as a shooting star. Comets, asteroids, and meteorites are different types of celestial objects, but only meteors exhibit the described behavior of burning brightly in the atmosphere.

The Earth can support life because it has air, water, and a suitable temperature. Air is necessary for organisms to breathe, while water is essential for various biological processes. The large surface area of the Earth provides ample space for diverse ecosystems to exist. Additionally, the Earth's suitable temperature allows for the existence of liquid water, which is crucial for life as we know it. Therefore, options i, ii, and iv are the correct factors explaining why the Earth can support life.