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Test: Solar System and Our Earth - 2 - Class 3 MCQ


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10 Questions MCQ Test - Test: Solar System and Our Earth - 2

Test: Solar System and Our Earth - 2 for Class 3 2024 is part of Class 3 preparation. The Test: Solar System and Our Earth - 2 questions and answers have been prepared according to the Class 3 exam syllabus.The Test: Solar System and Our Earth - 2 MCQs are made for Class 3 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Solar System and Our Earth - 2 below.
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Test: Solar System and Our Earth - 2 - Question 1
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Venus is often referred to as Earth's "twin" because:

Detailed Solution for Test: Solar System and Our Earth - 2 - Question 1
Venus and Earth are often called twins because of their similar sizes and densities, which lead to comparable gravity. However, Venus' atmosphere and surface conditions vastly differ from Earth's, making it an extreme example of the greenhouse effect. An interesting fact is that Venus' day is longer than its year due to its slow rotation!
Test: Solar System and Our Earth - 2 - Question 2
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Which planet is known as the "Morning Star" or "Evening Star"?

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Venus is known as the "Morning Star" or "Evening Star" because of its bright appearance in the sky just before sunrise or just after sunset. Its reflective clouds and proximity to Earth make it one of the brightest objects in the night sky. Interesting fact: Venus rotates in the opposite direction to most planets in the solar system, meaning the Sun rises in the west and sets in the east on Venus.
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Test: Solar System and Our Earth - 2 - Question 3
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The Great Red Spot is a massive storm observed on which planet?

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The Great Red Spot is a gigantic storm on Jupiter, so large that three Earths could fit within it. It has been observed for over 400 years, making it the solar system's longest-known storm. Interesting fact: The storm is a high-pressure region with winds reaching speeds of about 432 km/h (268 mph).
Test: Solar System and Our Earth - 2 - Question 4
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What gas is primarily responsible for the Sun's energy?
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The Sun generates its energy through the process of nuclear fusion, primarily fusing hydrogen atoms into helium. This process releases a tremendous amount of energy, which powers the Sun and provides light and warmth to our solar system. Interesting fact: The Sun converts about 4 million tons of hydrogen into energy every second!
Test: Solar System and Our Earth - 2 - Question 5
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Which planet is known for having a 24-hour day similar to Earth?
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Mars has a day (or sol) that is approximately 24 hours and 39 minutes long, making its daily cycle very similar to Earth's. This similarity is one reason Mars is considered one of the most habitable planets in our solar system after Earth. An interesting fact: Mars' seasonal cycles are also somewhat similar to Earth's, thanks to its similar axial tilt.
Test: Solar System and Our Earth - 2 - Question 6
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Which of the following planets has the most moons?
Detailed Solution for Test: Solar System and Our Earth - 2 - Question 6
Saturn holds the record for the most moons of any planet in our solar system, surpassing Jupiter. With over 80 confirmed moons, Saturn's gravitational influence captures numerous objects, contributing to its extensive moon count. Interesting fact: Saturn's largest moon, Titan, is the only moon in the solar system with a dense atmosphere and liquid lakes and rivers on its surface.
Test: Solar System and Our Earth - 2 - Question 7
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What is unique about Uranus' rotation?
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Uranus is unique in the solar system because it rotates on its side, with an axial tilt of about 98 degrees. This unusual tilt is thought to be the result of a collision with an Earth-sized object long ago, drastically altering its rotation. Interesting fact: This tilt causes extreme seasons that last over 20 years each.
Test: Solar System and Our Earth - 2 - Question 8
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Why does Mars appear red?
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Mars's red colour stems from the presence of an iron oxide mineral called Haematite, which is red when powdered, and this is present in a thin surface covering of soil over the planet.
Test: Solar System and Our Earth - 2 - Question 9
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What distinguishes a comet from an asteroid?
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The primary distinction between a comet and an asteroid is their composition. Comets are made of ice, dust, and organic compounds, which can vaporize when they come near the Sun, forming a visible atmosphere (or coma) and sometimes a tail. Asteroids, on the other hand, are rocky or metallic. Interesting fact: Comets are sometimes called "dirty snowballs" because of their icy composition mixed with rock and dust.
Test: Solar System and Our Earth - 2 - Question 10
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What is the significance of the asteroid belt?
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The asteroid belt is significant because it separates the inner planets (Mercury, Venus, Earth, Mars) from the outer planets (Jupiter, Saturn, Uranus, Neptune). It is composed of numerous rocks and debris left over from the solar system's formation. Interesting fact: The largest object in the asteroid belt is Ceres, which is classified as a dwarf planet because of its size and shape.
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