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

The Sun is the main source of natural light. The Moon and the Earth do not have their own light. The Moon reflects light from the Sun.

The Moon and the planets are also the part of the solar system.

Shadows are formed when a solid (opaque or translucent) object gets in the way of light.

The Earth has right mixture of air, heat and water which makes life possible on Earth.

The Sun makes the longest shadows at the beginning and end of the day, when the Sun is lowest in the sky.

The Sun appears to rise from the east in the morning. 

Shadows can form anywhere and anytime when an object gets in the way of light. Shadows are formed on the opposite side of a source of light.

The Sun the main source of natural light. It gives us light and heat.

• Saturn has the largest number of known satellites among the planets listed.
• As of the latest astronomical data, Saturn has over 80 confirmed moons.
• The most notable moon of Saturn is Titan, which is larger than the planet Mercury.
• Saturn's extensive ring system is accompanied by numerous small moons, contributing to its high satellite count.
• In comparison, Jupiter, another contender, has fewer known moons than Saturn.

The third planet from the Sun is Earth.
- Earth is the third planet in our solar system, counting from the Sun outward.
- It is located between Venus, the second planet, and Mars, the fourth planet.
- Earth is the only known planet to support life, with a diverse range of ecosystems and a favorable climate for the existence of organisms.
- It has a solid surface and is primarily composed of rock and metal.
- Earth has a diameter of about 12,742 kilometers (7,918 miles) and is approximately 149.6 million kilometers (93 million miles) away from the Sun.
- It takes Earth about 365.25 days to complete one orbit around the Sun, which defines a year.
- Earth also has a natural satellite, the Moon, which orbits around it.
- The planet has a complex system of landforms, including mountains, valleys, plains, and bodies of water such as oceans, lakes, and rivers.
- Earth's atmosphere is composed mainly of nitrogen and oxygen, which are essential for supporting life.
- It is the only planet in the solar system known to have liquid water on its surface.
- Earth's position in the habitable zone, also known as the Goldilocks zone, allows it to maintain a stable climate and suitable conditions for life to thrive.
- The study of Earth and its processes is known as Earth science or geoscience.