Olympiad Test: Beyond Earth - 2 - Class 6 MCQ

The Sun looks big and bright because it is much closer to Earth than other stars. In reality, many stars are bigger, but distance makes them look tiny.

Earth is about 150 million kilometres from the Sun. Scientists call this distance 1 Astronomical Unit (AU).

Venus shines brightly at dawn or dusk, making it visible as the "Morning Star" or "Evening Star," even though it is a planet.

Mars is reddish because of iron-rich dust in its soil, so it’s called the Red Planet.

Earth looks blue from space because 70% of its surface is covered by water.

The outer planets are gas giants. They are much larger and have rings made of dust and rocks.

Venus has a thick atmosphere full of carbon dioxide. This causes a greenhouse effect, trapping heat and making it hotter than Mercury.

Asteroids are rocky objects, mostly found in the asteroid belt between Mars and Jupiter. They are smaller than planets and irregular in shape.

Comets are made of ice, dust, and gas. When they come near the Sun, heat makes ice evaporate, creating a glowing tail.

The Milky Way is our home galaxy. It contains billions of stars, including our Sun and Solar System. From Earth, it looks like a faint band of light in the night sky.